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itemscope itemtype="http://schema.org/ListItem" class="breadcrumb-nav__item item-current item-cat"> <a itemprop="item" href="https://www.physics.wisc.edu/news-archives/" class="breadcrumb-nav__link bread-current bread-cat" title=" News Archives" aria-current="page"> <span itemprop="name"> News Archives</span> <meta itemprop="position" content="2"> </a> </li> </ol> </nav> <div id="page" class="content"> <main id="main" class="site-main"> <header> <h1 class="page-title uw-mini-bar">News Archives</h1> </header> <article id="post-12467" class="post-12467 post type-post status-publish format-standard has-post-thumbnail hentry category-astrophysics"> <header class="entry-header"> <h1 class="page-title uw-mini-bar">Welcome, Prof. Melinda Soares-Furtado!</h1> <div class="entry-meta"> <span class="posted-on">Posted on <a href="https://www.physics.wisc.edu/2024/11/01/welcome-prof-melinda-soares-furtado/" rel="bookmark"><time class="entry-date published updated" datetime="2024-11-01T13:33:09-05:00">November 1, 2024</time></a></span> </div> </header> <div class="entry-content"> <figure id="attachment_10409" class="wp-caption alignleft" style="max-width: 227px;" aria-label="Melinda Soares-Furtado"><a href="https://www.physics.wisc.edu/wp-content/uploads/2024/01/Soares-Furtado-2024.png"><img fetchpriority="high" decoding="async" class="size-medium wp-image-10409" src="https://www.physics.wisc.edu/wp-content/uploads/2024/01/Soares-Furtado-2024-227x300.png" alt="profile photo of Melinda Soares-Furtado" width="227" height="300" srcset="https://www.physics.wisc.edu/wp-content/uploads/2024/01/Soares-Furtado-2024-227x300.png 227w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Soares-Furtado-2024-776x1024.png 776w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Soares-Furtado-2024-768x1014.png 768w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Soares-Furtado-2024-1164x1536.png 1164w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Soares-Furtado-2024-1200x1584.png 1200w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Soares-Furtado-2024.png 1220w" sizes="(max-width: 227px) 100vw, 227px" /></a><figcaption class="wp-caption-text">Melinda Soares-Furtado</figcaption></figure> <p class="p1"><span class="s1"><a href="https://www.physics.wisc.edu/directory/soares-furtado-melinda/">Melinda Soares-Furtado</a>, an observational astronomer, joined the UW–Madison faculty this fall on a joint appointment in the astronomy and physics departments. She earned her undergrad degree at UC-Santa Cruz, then her doctorate in astrophysical sciences at Princeton. In 2020, she began a postdoc apppointment in UW–Madison astronomy, where she subsequently was awarded a NASA Hubble Postdoctoral Fellowship. </span></p> <p class="p2"><span class="s2"><i>Please give an overview of your research.</i></span></p> <p class="p1"><span class="s2">I’m interested in stars and the planets that orbit them. So far, here at Madison, my team has detected and characterized two young, nearby planets. I want to know as much as possible about the worlds we discover, and part of that investigation includes knowing as much as possible about the stars the planet orbits. We have lines of research focused on the stellar age, its local environment (is it isolated or moving with a large collection of stars?), and its activity. Is the planet orbiting the star in a docile, stable environment or one that makes it more challenging to retain an atmosphere? How can we use follow-up observations both on the ground and with space-based facilities to get new insights into these worlds? Can instruments like HST and JWST offer a glimpse of the planet’s atmospheric evolution? Given the ever-expanding number of worlds we have discovered over the past three decades, how unusual is our own Solar System? </span></p> <p class="p2"><span class="s2"><i>What are one or two main projects your group will work on first?</i></span></p> <p class="p3"><span class="s2">I have a broad range of research interests, so one or two main projects is sort of hard to narrow down. Right now, I’m most excited about the young worlds we have found in the Solar Neighborhood and the added context we can get with additional observations. I’d like to know the mass of the mini-Neptune-sized planet we recent found and here at UW-Madison, we have access to the institutional resources that will allow us to make this measurement! This planet is compelling, because it is found at the upper edge of a distribution known as the “radius valley”. The mass can help us understand the eventual fate of this young planet orbiting an active M dwarf star. I’m also interested to see what we learn with JWST and HST about an Earth-sized planet we found orbiting a Sun-like star. Will we see signs of atmospheric outgassing? </span></p> <p class="p4"><span class="s2">Putting on my stellar astronomer hat, I’m also really intrigued by what more we can learn about stars and ways in which we can better estimate their ages and evolutionary histories. Again, here at UW-Madison, our institutional access makes it possible to probe some of these mysteries in impactful ways — largely due to our access to WIYN/NEID, which offers high-precision measurements of a star’s shifting spectral lines. </span></p> <p class="p2"><span class="s2"><i>What attracted you to Madison and the University?</i><i></i></span></p> <p class="p3"><span class="s2">I was drawn to the University of Wisconsin–Madison for its exceptional research environment and the wealth of opportunities available for collaboration. The Department of Astronomy is not only broad in its research pursuits — it is also notably collegiate, fostering a collaborative and supportive atmosphere among faculty, students, and staff. Access to cutting-edge facilities such as WIYN/NEID, SALT, and NOEMA was a strong attraction, as these instruments enable a range of high-impact research opportunities, from precise stellar characterization to molecular gas studies. </span></p> <p class="p4"><span class="s2">I was also excited to join the Wisconsin Center for Origins Research (WiCOR) collaboration. The Wisconsin Center for Origins Research (WiCOR) is a multidisciplinary center at UW-Madison designed to unite researchers from diverse scientific departments, including astronomy, chemistry, geoscience, and biology, to study the origins of life in the universe. Recently established with a dedicated research space, WiCOR not only focuses on cutting-edge projects — such as investigating potentially habitable exoplanets with the James Webb Space Telescope—but also emphasizes public outreach and educational initiatives, making it a leader in origins research and science communication.</span></p> <p class="p2"><span class="s2"><i>What is your favorite element and/or elementary particle?</i><i></i></span></p> <p class="p4"><span class="s2">I think everyone in the department knows I have a fondness for lithium! As a PhD student, I worked on the signatures of stars that ingest their planetary companions, finding that lithium excess can sometimes be observed. I predicted which stars which show such an enhancement, and this was verified in large abundance surveys a year later. Lithium is a useful flag for engulfment, because it is readily destroyed in the interiors of forming stars, but never reaches temperatures required for destruction in planets. It therefore can be one to two orders of magnitude higher in these less massive bodies. If a star ingests a planet later in its evolution, that signature is sometimes observable! I like to hunt for such lithium-rich stars and then explore other aspects of their chemistry to better understand the cause of their enrichment. </span></p> <p class="p2"><span class="s2"><i>What hobbies and interests do you have?</i><i></i></span></p> <p class="p4"><span class="s2">I like to garden, read, and spend time with my family. I often hike the Grady Tract Loop not far from my home. I have an app I use to identify plants, fungi, and wildlife. My daughter and I like to use it when we go on walks together. I have a fondness for photography. During my undergraduate years, I worked with my sister as a family photographer in California. These days I mostly photograph plants and landscapes. I also love to dance cumbia, salsa, and bachata. I danced often when I was growing up and even spent some time on a salsa choreography team in San Jose, California. I also collect and read vintage textbooks — most of my favorites are from the 1930s. </span></p> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/astrophysics/" rel="category tag">Astrophysics</a></span> </footer> </article> <article id="post-12465" class="post-12465 post type-post status-publish format-standard has-post-thumbnail hentry category-condensed-matter category-quantum-computing category-quantum-science"> <header class="entry-header"> <h1 class="page-title uw-mini-bar">Welcome, Prof. Britton Plourde!</h1> <div class="entry-meta"> <span class="posted-on">Posted on <a href="https://www.physics.wisc.edu/2024/11/01/welcome-prof-britton-plourde/" rel="bookmark"><time class="entry-date published updated" datetime="2024-11-01T13:29:08-05:00">November 1, 2024</time></a></span> </div> </header> <div class="entry-content"> <figure id="attachment_12452" class="wp-caption alignleft" style="max-width: 300px;" aria-label="Britton Plourde (credit: Isabelle Delfosse, L&amp;S)"><a href="https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118.jpeg"><img decoding="async" class="size-medium wp-image-12452" src="https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118-300x300.jpeg" alt="profile photo of Britton Plourde" width="300" height="300" srcset="https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118-300x300.jpeg 300w, https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118-1024x1024.jpeg 1024w, https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118-150x150.jpeg 150w, https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118-768x768.jpeg 768w, https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118-1536x1536.jpeg 1536w, https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118-1200x1200.jpeg 1200w, https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118-400x400.jpeg 400w, https://www.physics.wisc.edu/wp-content/uploads/2024/10/Britton-Plourde-2024-Isabelle-Delfosse-LS-scaled-e1730206690118.jpeg 1706w" sizes="(max-width: 300px) 100vw, 300px" /></a><figcaption class="wp-caption-text">Britton Plourde (credit: Isabelle Delfosse, L&S)</figcaption></figure> <p>Condensed matter experimentalist <a href="https://www.physics.wisc.edu/directory/plourde-britton-l/">Britton Plourde</a> received his bachelor’s in physics and music performance from the University of Michigan. He then went to grad school at UIUC, earning a PhD in physics and a master’s in music performance. He completed a postdoc at UC-Berkeley, then began as an assistant professor of physics at Syracuse University in 2005, moving up the ranks to full professor there. In Fall 2024, Plourde joined the UW–Madison physics department as a full professor. He is joining the department on a half-time appointment; for the other half, he will be working at Qolab, a quantum computing startup company based in Madison.</p> <p><em> </em><em>Please give an overview of your research.</em></p> <p>I work on superconducting quantum circuits. We make microfabricated superconducting circuits that have what are called Josephson tunnel junctions in them. And one of the biggest things we use these for is making qubits. We study all of the various physics related to how qubits work, what limits their performance, and ways to make them perform better so you could eventually build a practical, large-scale quantum computer. My research is similar to Robert McDermott’s and Roman Kuzmin’s.</p> <p><em>What are the first one or two projects that you will have your group working on or continuing to work on when you arrive in Madison?</em></p> <p>The company I’m working with, Qolab, is focused on building a quantum computer. My academic research lab at the university will be focused on fundamental physics related to operation of qubits, including the individual components of qubits like the Josephson junctions and to different processes that limit the performance of qubits. At the same time, the company is really focused on the technology of fabricating lots of qubits in a uniform, reproducible way and building them into a quantum computer.</p> <p>In my group, a significant focus is going to be on understanding quasiparticles in superconducting qubits and how they impact the behavior of those qubits. Quasiparticles are electronic excitations above the superconducting ground state. The superconducting ground state is important because it doesn’t have any dissipation. But these quasiparticles are dissipative, and they can degrade the performance of a superconducting circuit. There are various things that can generate the quasiparticles, but one of them is radioactivity: background radiation from radioactive contaminants in the lab or from cosmic rays. My group is going to continue spending time on understanding the physics of those processes and coming up with ways to try to mitigate their effects to make qubits that are more immune to quasiparticles.</p> <p>We’re also hoping to study quasiparticle physics in qubits for the completely opposite reason: instead of trying to mitigate the effects of quasiparticles to make better qubits, it’s to amplify the effects of quasiparticles to make better detectors, potentially to detect dark matter particles. Robert and I are co-principal investigators with some particle physics collaborators on two Department of Energy proposals for this work that we recently submitted. This work hasn’t been funded yet, but if it is, it is going to be a new and interesting research direction in both of our groups.</p> <p><em>What attracted you to Madison and the university?</em></p> <p>It’s a great department. I’ve known it for a long time because I collaborated with Robert almost as long as he’s been there. I’ve visited a lot over the years, and I like the area and the city. The university has made an impressive investment in quantum information science, and they’re a real leader in that area and have research strengths across multiple different qubit technologies, both experimentally and with a strong team of theorists working on different aspects of quantum information science and condensed matter. It’s really a powerhouse place, so I’m excited to join. University leadership has also been very supportive of the startup, they’re strongly encouraging of the entrepreneurial direction of faculty, and that’s not the case at a lot of other places.</p> <p><em>What is your favorite element and/or elementary particle?</em></p> <p>My favorite element has to be aluminum. That’s the superconductor we use the most. The same aluminum that you could use to wrap a hot dog at a baseball game to keep it warm, you can instead cool it down to below one degree Kelvin and it becomes a superconductor. And it makes great Josephson junctions for qubits.</p> <p><em>What hobbies and interests do you have?</em></p> <p>Well, I’m still a musician, I’m a flutist. I don’t really make money on it anymore, but I was a professional musician for a while. For the last three years of grad school, I had a job in a professional orchestra. I do still play occasionally, and I’ll have to see how much time I have when we get to Madison. My wife is a professional musician. She’s an oboist and she’ll be working part time in the School of Music developing a new monthly recital series.</p> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/condensed-matter/" rel="category tag">Condensed matter</a>, <a href="https://www.physics.wisc.edu/category/quantum-computing/" rel="category tag">Quantum Computing</a>, <a href="https://www.physics.wisc.edu/category/quantum-science/" rel="category tag">Quantum Science</a></span> </footer> </article> <article id="post-12429" class="post-12429 post type-post status-publish format-standard has-post-thumbnail hentry category-in-the-news"> <header> <h1 class="page-title uw-mini-bar">How Do Merging Supermassive Black Holes Pass the Final Parsec?</h1> <div></div> </header> <div class="entry-content"> <p>The giant holes in galaxies’ centers shouldn’t be able to merge, yet merge they do. Scientists suggest that an unusual form of dark matter may be the solution. <p>The post <a href="https://www.quantamagazine.org/how-do-merging-supermassive-black-holes-pass-the-final-parsec-20241023/" target="_blank">How Do Merging Supermassive Black Holes Pass the Final Parsec?</a> first appeared on <a href="https://www.quantamagazine.org" target="_blank">Quanta Magazine</a></p></p> Read the full article at: <a href="https://www.quantamagazine.org/how-do-merging-supermassive-black-holes-pass-the-final-parsec-20241023/" target="_blank"> https://www.quantamagazine.org/how-do-merging-supermassive-black-holes-pass-the-final-parsec-20241023/ </a> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/in-the-news/" rel="category tag">In the News</a></span> </footer> </article> <article id="post-12426" class="post-12426 post type-post status-publish format-standard has-post-thumbnail hentry category-in-the-news"> <header> <h1 class="page-title uw-mini-bar">Bose featured in Physics World panel on latest in Higgs research in honor of CERN’s 70th anniversary</h1> <div></div> </header> <div class="entry-content"> Read the full article at: <a href="https://physicsworld.com/a/how-a-next-generation-particle-collider-could-unravel-the-mysteries-of-the-higgs-boson/" target="_blank"> https://physicsworld.com/a/how-a-next-generation-particle-collider-could-unravel-the-mysteries-of-the-higgs-boson/ </a> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/in-the-news/" rel="category tag">In the News</a></span> </footer> </article> <article id="post-12399" class="post-12399 post type-post status-publish format-standard has-post-thumbnail hentry category-artificial-intelligence category-astrophysics category-machine-learning tag-collaboration tag-data-science tag-grants tag-northwestern tag-nsf tag-simons-foundation"> <header class="entry-header"> <h1 class="page-title uw-mini-bar">UW–Madison joins new NSF-Simons AI Institute for the Sky</h1> <div class="entry-meta"> <span class="posted-on">Posted on <a href="https://www.physics.wisc.edu/2024/10/18/uw-madison-joins-new-nsf-simons-ai-institute-for-the-sky/" rel="bookmark"><time class="entry-date published updated" datetime="2024-10-18T13:00:19-05:00">October 18, 2024</time></a></span> </div> </header> <div class="entry-content"> <p><em>This post is modified from the <a href="https://news.northwestern.edu/stories/2024/september/northwestern-to-lead-20-million-national-ai-research-institute-in-astronomy">original news story from Northwestern University</a></em></p> <p>A large multi-institutional collaboration— led by Northwestern University and including UW–Madison physics professors Keith Bechtol, Kyle Cranmer, and Moritz Münchmeyer — has received a $20 million grant to develop and apply new artificial intelligence (AI) tools to astrophysics research and deep space exploration.</p> <p>Jointly funded by the National Science Foundation (NSF) and the Simons Foundation, the highly competitive grant will establish the <a href="http://www.skai-institute.org/" target="_blank" rel="noopener noreferrer">NSF-Simons AI Institute for the Sky</a> (SkAI, pronounced “sky”). SkAI is one of two National AI Research Institutes in Astronomy <a href="https://new.nsf.gov/news/nsf-simons-foundation-launch-2-ai-institutes-help" target="_blank" rel="noopener noreferrer">announced today</a>. Northwestern astrophysicist <a href="https://physics.northwestern.edu/people/faculty/core-faculty/vicky-kalogera.html">Vicky Kalogera</a> is principal investigator of the grant and will serve as the director of SkAI. Northwestern AI expert <a href="https://www.mccormick.northwestern.edu/research-faculty/directory/profiles/katsaggelos-aggelos.html">Aggelos Katsaggelos</a> is a co-principal investigator of the grant.</p> <p>The new institute will unite multidisciplinary researchers to develop innovative, trustworthy AI tools for astronomy, which will be used to pursue breakthrough discoveries by analyzing large astronomy datasets, transform physics-based simulations and more. With unprecedentedly large sky surveys poised to launch, including from the Vera C. Rubin Observatory in Chile, astronomers will require smarter, more efficient tools to accelerate the mining and interpretation of increasingly large datasets. SkAI will fulfill a crucial role in developing and refining these tools.</p> <p style="text-align: center"><a class="uw-button uw-button-red" href="https://news.northwestern.edu/stories/2024/september/northwestern-to-lead-20-million-national-ai-research-institute-in-astronomy">Read the full NU press release</a></p> <p style="text-align: center"><a class="uw-button uw-button-red" href="https://skai-institute.org/">Learn more about SkAI</a></p> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/artificial-intelligence/" rel="category tag">Artificial Intelligence</a>, <a href="https://www.physics.wisc.edu/category/astrophysics/" rel="category tag">Astrophysics</a>, <a href="https://www.physics.wisc.edu/category/machine-learning/" rel="category tag">machine learning</a></span><span class="tags-links">Tagged <a href="https://www.physics.wisc.edu/tag/collaboration/" rel="tag">collaboration</a>, <a href="https://www.physics.wisc.edu/tag/data-science/" rel="tag">data science</a>, <a href="https://www.physics.wisc.edu/tag/grants/" rel="tag">grants</a>, <a href="https://www.physics.wisc.edu/tag/northwestern/" rel="tag">Northwestern</a>, <a href="https://www.physics.wisc.edu/tag/nsf/" rel="tag">NSF</a>, <a href="https://www.physics.wisc.edu/tag/simons-foundation/" rel="tag">Simons Foundation</a></span> </footer> </article> <article id="post-12386" class="post-12386 post type-post status-publish format-standard has-post-thumbnail hentry category-astrophysics category-particle-physics category-research category-wipac"> <header> <h1 class="page-title uw-mini-bar">HAWC detection of an ultra-high-energy gamma-ray bubble around a microquasar</h1> <div></div> </header> <div class="entry-content"> <p>This story is adapted from the HAWC Collaboration press release. Microquasars—compact regions surrounding a black hole with a mass several times that of its companion star—have long been recognized as powerful particle accelerators within our galaxy. The enormous jets spewing out of microquasars are thought to play an important role in the production of galactic cosmic rays, although [...]</p> Read the full article at: <a href="https://wipac.wisc.edu/hawc-detection-of-an-ultra-high-energy-gamma-ray-bubble-around-a-microquasar/" target="_blank"> https://wipac.wisc.edu/hawc-detection-of-an-ultra-high-energy-gamma-ray-bubble-around-a-microquasar/ </a> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/astrophysics/" rel="category tag">Astrophysics</a>, <a href="https://www.physics.wisc.edu/category/particle-physics/" rel="category tag">particle physics</a>, <a href="https://www.physics.wisc.edu/category/research/" rel="category tag">Research</a>, <a href="https://www.physics.wisc.edu/category/wipac/" rel="category tag">WIPAC</a></span> </footer> </article> <article id="post-12374" class="post-12374 post type-post status-publish format-standard has-post-thumbnail hentry category-condensed-matter category-faculty category-quantum-computing category-quantum-science tag-condensed-matter-theory tag-quantum-theory tag-qubits"> <header class="entry-header"> <h1 class="page-title uw-mini-bar">Welcome, Professor Ben Woods!</h1> <div class="entry-meta"> <span class="posted-on">Posted on <a href="https://www.physics.wisc.edu/2024/10/17/welcome-professor-ben-woods/" rel="bookmark"><time class="entry-date published updated" datetime="2024-10-17T14:01:09-05:00">October 17, 2024</time></a></span> </div> </header> <div class="entry-content"> <figure id="attachment_10424" class="wp-caption alignleft" style="max-width: 284px;" aria-label="Ben Woods"><a href="https://www.physics.wisc.edu/wp-content/uploads/2024/01/Ben-Woods-2024-e1705428456951.jpeg"><img decoding="async" class="size-medium wp-image-10424" src="https://www.physics.wisc.edu/wp-content/uploads/2024/01/Ben-Woods-2024-e1705428456951-284x300.jpeg" alt="profile photo of Ben Woods" width="284" height="300" srcset="https://www.physics.wisc.edu/wp-content/uploads/2024/01/Ben-Woods-2024-e1705428456951-284x300.jpeg 284w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Ben-Woods-2024-e1705428456951-971x1024.jpeg 971w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Ben-Woods-2024-e1705428456951-768x810.jpeg 768w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Ben-Woods-2024-e1705428456951-1456x1536.jpeg 1456w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Ben-Woods-2024-e1705428456951-1200x1266.jpeg 1200w, https://www.physics.wisc.edu/wp-content/uploads/2024/01/Ben-Woods-2024-e1705428456951.jpeg 1815w" sizes="(max-width: 284px) 100vw, 284px" /></a><figcaption class="wp-caption-text">Ben Woods</figcaption></figure> <p>Condensed matter theorist Ben Woods joined the department as an assistant professor this fall. Originally from a small town in North Dakota, Woods studied physics at the University of North Dakota and earned a PhD in physics from West Virginia University. He first came to UW–Madison for a postdoc with Mark Friesen in 2021, and now moves into his faculty role.</p> <p><em>Please give an overview of your research.</em></p> <p>I primarily work in two main areas of condensed matter theory and quantum information science. The first area is the theory of semiconductor quantum dots, with applications towards building and operating quantum computers based on spin qubits. Quantum dots can be thought of as artificial atoms in which electrons are trapped and manipulated within a semiconductor, such as silicon, by metallic gates that sit on top of the semiconductor. An electron in the quantum dot forms the basis for a type of qubit called a spin qubit, where the quantum information is stored in the spin of the electron. I investigate how we can build higher quality spin qubits. One aspect of this is analyzing and designing single and two qubit gates such that their efficiency and noise resiliency can be improved. Another aspect is studying the materials and design of quantum dot devices to optimize certain properties, such as how the qubits respond to an external magnetic field. I am also interested in quantum dot arrays as a platform for quantum simulation. Here the idea is to engineer the interactions between the quantum dots to emulate a quantum system of interest.</p> <p>The other area I work in is semiconductor-superconductor heterostructures. Here, you’re trying to combine desirable properties of both types of materials to create interesting devices that would otherwise be impossible. I study semiconductor-superconductor heterostructures that can give rise to exotic particles known as Majorana zero modes, which form the basis for topological qubits. These qubits are immune to certain error sources that more conventional types of qubits are not. I am trying to understand the effects of disorder on these heterostructures and develop new schemes in which Majorana zero modes can be realized.</p> <p><em>What are one or two of the main projects your group will work on first?</em></p> <p>One initial project will focus on designing a new qubit architecture for quantum dot spin qubits. In the most conventional type of spin qubit, you have a single electron spin that is manipulated by jiggling it with an electric field back and forth within a single quantum dot. It turns out, however, that these qubits can be manipulated more efficiently if you can hop electrons between multiple quantum dots. Specifically, I’ve devised new schemes involving three dots in a triangular geometry in which single-qubit gates can be performed quite efficiently. These ideas work in principle, but now it’s a matter of quantitatively studying how noise resilient the scheme is and how finely tuned the system parameters need to be for things to go as planned.</p> <p>A second initial project is more towards quantum simulation using quantum dot arrays. The project will focus on studying magnetism in quantum dot arrays. In other words, asking how the spins of the quantum dot electrons organize due to their mutual interaction. One interesting wrinkle in these quantum dot arrays based on silicon is that there is a valley degree of freedom in addition to the usual spin degree of freedom. The project involves understanding the effects on the magnetic ordering due to this additional valley degree of freedom. Specifically, I am interested in how fluctuations in the valley degree of freedom from one dot to the next can impact magnetic ordering.</p> <p><em>What attracted you to Madison and the university?</em></p> <p>There were two main reasons. First, my wife had gotten a residency as an anesthesiologist at the UW hospital. So that was an obvious motivation. Second, one of my grad school advisors knew Mark Eriksson and Mark Friesen and thought it’d be a natural fit for me to work with them as a postdoc. Since moving here, my family has enjoyed Madison, and I really like the physics department. The people are very friendly and collaborative. I am incredibly happy to be able to stay in Madison and at the UW physics department.</p> <p><em>What is your favorite element and/ or elementary particle?</em></p> <p>It has to be silicon, right? It’s the material I think about every day. And the world economy is largely based on stuff made with silicon. So that’s pretty cool?</p> <p><em>What hobbies and interests do you have?</em></p> <p>I like to play guitar, read, watch sports, and spend time with my family and friends. I have two kids, three years and six months old, who I like to spend most of my free time on.</p> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/condensed-matter/" rel="category tag">Condensed matter</a>, <a href="https://www.physics.wisc.edu/category/faculty/" rel="category tag">Faculty</a>, <a href="https://www.physics.wisc.edu/category/quantum-computing/" rel="category tag">Quantum Computing</a>, <a href="https://www.physics.wisc.edu/category/quantum-science/" rel="category tag">Quantum Science</a></span><span class="tags-links">Tagged <a href="https://www.physics.wisc.edu/tag/condensed-matter-theory/" rel="tag">condensed matter theory</a>, <a href="https://www.physics.wisc.edu/tag/quantum-theory/" rel="tag">quantum theory</a>, <a href="https://www.physics.wisc.edu/tag/qubits/" rel="tag">qubits</a></span> </footer> </article> <article id="post-12370" class="post-12370 post type-post status-publish format-standard has-post-thumbnail hentry category-in-the-news"> <header> <h1 class="page-title uw-mini-bar">Halzen featured in APS story on neutrino detector experiments</h1> <div></div> </header> <div class="entry-content"> Read the full article at: <a href="https://www.aps.org/apsnews/2024/10/underground-discovery-particle-physics" target="_blank"> https://www.aps.org/apsnews/2024/10/underground-discovery-particle-physics </a> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/in-the-news/" rel="category tag">In the News</a></span> </footer> </article> <article id="post-12309" class="post-12309 post type-post status-publish format-standard has-post-thumbnail hentry category-astrophysics category-awards-and-honors tag-aps tag-bethe-prize"> <header class="entry-header"> <h1 class="page-title uw-mini-bar">Baha Balantekin wins 2025 APS Bethe Prize</h1> <div class="entry-meta"> <span class="posted-on">Posted on <a href="https://www.physics.wisc.edu/2024/10/15/baha-balantekin-wins-2025-aps-bethe-prize/" rel="bookmark"><time class="entry-date published updated" datetime="2024-10-15T11:45:41-05:00">October 15, 2024</time></a></span> </div> </header> <div class="entry-content"> <figure id="attachment_6863" class="wp-caption alignleft" style="max-width: 300px;" aria-label="Baha Balantekin"><a href="https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678.jpg"><img loading="lazy" decoding="async" class="size-medium wp-image-6863" src="https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678-300x300.jpg" alt="Profile photo of Baha Balantekin" width="300" height="300" srcset="https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678-300x300.jpg 300w, https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678-1024x1024.jpg 1024w, https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678-150x150.jpg 150w, https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678-768x768.jpg 768w, https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678-1200x1200.jpg 1200w, https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678-400x400.jpg 400w, https://www.physics.wisc.edu/wp-content/uploads/2022/05/20220506_Banquet_009-scaled-e1652203155678.jpg 1401w" sizes="auto, (max-width: 300px) 100vw, 300px" /></a><figcaption class="wp-caption-text">Baha Balantekin</figcaption></figure> <p>Congrats to <a href="https://www.physics.wisc.edu/directory/balantekin-a-b/">Prof. Baha Balantekin</a> on winning the American Physical Society’s 2025 Hans A. Bethe prize!</p> <p>The <a href="https://www.aps.org/funding-recognition/prize/hans-bethe">Bethe prize</a> is awarded to recognize outstanding work in theory, experiment or observation in the areas of astrophysics, nuclear physics, nuclear astrophysics, or closely related fields. Balantekin won “for seminal contributions to neutrino physics and astrophysics — especially the neutrino flavor transformation problem — both for solar neutrinos and the nonlinear supernova environment.”</p> <p>Balantekin works at the intersection of particle physics, nuclear physics, and astrophysics. For much of his career, he has studied theoretical aspects of neutrino transport originating in the Sun, supernovae, or neutron star mergers.</p> <p>“The concepts (I brought to the field) were marrying neutrino physics with many-body physics,” Balantekin says. “Of course, incorporating many-body aspects is common in condensed matter and nuclear physics, but it’s not as common in environments studied in astrophysics.”</p> <p>Several fundamental astrophysical processes produce neutrinos as byproducts, and scientists have been studying neutrino origins and patterns for decades. Detecting the Sun’s neutrinos can reveal insights into its nuclear reactions, for example, and detecting neutrinos from core collapse supernovae can reveal insights into the early universe.</p> <p>Balantekin’s early research was on the theory of neutrino transport from the Sun. He has also been studying core collapse supernovae, the result of a star running out of nuclear fuel. During collapse, a very hot star cools very quickly, emitting neutrinos on the order of 10^58.</p> <p>“A number of that magnitude means you can no longer ignore the neutrino-neutrino interactions,” Balantekin says. “And then it becomes a very interesting many-body problem, where you have two-body interactions between neutrinos, and the propagation, and then it becomes a very complex problem.”</p> <figure id="attachment_12310" class="wp-caption alignright" style="max-width: 300px;" aria-label="Balantekin and department collaborators in 1995. Balantekin is seated, right. Seated next to him is former PhD student Alan DeWeerd. Standing row, L-R: Franco Ruggeri, John Beacom, Jonathan Fetter, late physics professor Kirk McVoy, and William Friedman."><a href="https://www.physics.wisc.edu/wp-content/uploads/2024/10/group1995.jpeg"><img loading="lazy" decoding="async" class="size-medium wp-image-12310" src="https://www.physics.wisc.edu/wp-content/uploads/2024/10/group1995-300x182.jpeg" alt="black and white group photo from 1995. There are 7 men featured" width="300" height="182" srcset="https://www.physics.wisc.edu/wp-content/uploads/2024/10/group1995-300x182.jpeg 300w, https://www.physics.wisc.edu/wp-content/uploads/2024/10/group1995.jpeg 514w" sizes="auto, (max-width: 300px) 100vw, 300px" /></a><figcaption class="wp-caption-text">Balantekin and department collaborators in 1995. Balantekin is seated, right. Seated next to him is former PhD student Alan DeWeerd. Standing row, L-R: Franco Ruggeri, John Beacom, Jonathan Fetter, late physics professor Kirk McVoy, and William Friedman.</figcaption></figure> <p>To describe this problem, has more recently begun using techniques from quantum information science to study entanglement of neutrinos with each other and to look at the signatures of such interactions and how they <a href="https://www.physics.wisc.edu/2024/06/06/entangled-neutrinos-may-lead-to-heavier-element-formation/">might contribute to heavy element formation</a>.</p> <p>The Bethe Prize was awarded solely to Balantekin, but he says he would not have won it without his collaborators over the years.</p> <p>“You don’t do work in a vacuum,” Balantekin says. “I’ve worked with a lot of very talented young people. I would like to acknowledge first not only my graduate students at Wisconsin, but also the Fellows who came from the <a href="https://n3as.berkeley.edu/collaboration/">N3AS Physics Frontier Center</a> we have. And the people I collaborate with around the world. We also have colleagues here in the department like Sue Coppersmith and Mark Saffman who contributed many ideas.”</p> <p>The Bethe prize consists of $10,000 and a certificate citing the contributions made by the recipient. It is presented annually.</p> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/astrophysics/" rel="category tag">Astrophysics</a>, <a href="https://www.physics.wisc.edu/category/awards-and-honors/" rel="category tag">Awards and Honors</a></span><span class="tags-links">Tagged <a href="https://www.physics.wisc.edu/tag/aps/" rel="tag">APS</a>, <a href="https://www.physics.wisc.edu/tag/bethe-prize/" rel="tag">Bethe Prize</a></span> </footer> </article> <article id="post-12262" class="post-12262 post type-post status-publish format-standard has-post-thumbnail hentry category-awards-and-honors category-quantum-science tag-aps tag-aps-fellow tag-quantum-information-science tag-wqi"> <header class="entry-header"> <h1 class="page-title uw-mini-bar">Britton Plourde elected Fellow of the American Physical Society</h1> <div class="entry-meta"> <span class="posted-on">Posted on <a href="https://www.physics.wisc.edu/2024/10/04/britton-plourde-elected-fellow-of-the-american-physical-society/" rel="bookmark"><time class="entry-date published updated" datetime="2024-10-04T16:03:42-05:00">October 4, 2024</time></a></span> </div> </header> <div class="entry-content"> <div class="entry-content"> <figure id="attachment_11820" class="wp-caption alignleft" style="max-width: 300px;" aria-label="Britton Plourde (credit: Syracuse University)"><a href="https://www.physics.wisc.edu/wp-content/uploads/2024/08/plourde-britton-pic2-2024-credit-Syracuse-University.jpg"><img loading="lazy" decoding="async" class="size-medium wp-image-11820" src="https://www.physics.wisc.edu/wp-content/uploads/2024/08/plourde-britton-pic2-2024-credit-Syracuse-University-300x300.jpg" alt="profile photo of Britton Plourde" width="300" height="300" srcset="https://www.physics.wisc.edu/wp-content/uploads/2024/08/plourde-britton-pic2-2024-credit-Syracuse-University-300x300.jpg 300w, https://www.physics.wisc.edu/wp-content/uploads/2024/08/plourde-britton-pic2-2024-credit-Syracuse-University-150x150.jpg 150w, https://www.physics.wisc.edu/wp-content/uploads/2024/08/plourde-britton-pic2-2024-credit-Syracuse-University-400x400.jpg 400w, https://www.physics.wisc.edu/wp-content/uploads/2024/08/plourde-britton-pic2-2024-credit-Syracuse-University.jpg 500w" sizes="auto, (max-width: 300px) 100vw, 300px" /></a><figcaption class="wp-caption-text">Britton Plourde (credit: Syracuse University)</figcaption></figure> <p>Congratulations to <a href="https://www.physics.wisc.edu/directory/plourde-britton-l/">Prof. Britton Plourde</a> for being elected a Fellow of the American Physical Society!</p> <div class="[&_p]:text-[16px] leading-[1.2] mt-2 italic tracking-[0.64]"> <p class="font-default text-base max-w-[80ch] mb-[1em] last:mb-0">Plourde was elected “For important contributions to the physics and operation of superconducting qubits, including the development of techniques for scalable qubit control and readout, and investigations of decoherence from vortices and nonequilibrium quasiparticles.” He was nominated by the Division of Quantum Information Fellowship.</p> </div> <p>APS Fellowship is a distinct honor signifying recognition by one’s professional peers for outstanding contributions to physics. Each year, no more than one half of one percent of the Society’s membership is recognized by this honor.</p> <div class="entry-content"> <p>See the full list of 2024 honorees at the <a href="https://www.aps.org/funding-recognition/aps-fellowship">APS Fellows archive</a>.</p> </div> </div> </div> <footer class="entry-footer"> <span class="cat-links">Posted in <a href="https://www.physics.wisc.edu/category/awards-and-honors/" rel="category tag">Awards and Honors</a>, <a href="https://www.physics.wisc.edu/category/quantum-science/" rel="category tag">Quantum Science</a></span><span class="tags-links">Tagged <a href="https://www.physics.wisc.edu/tag/aps/" rel="tag">APS</a>, <a href="https://www.physics.wisc.edu/tag/aps-fellow/" rel="tag">APS Fellow</a>, <a href="https://www.physics.wisc.edu/tag/quantum-information-science/" rel="tag">Quantum Information Science</a>, <a href="https://www.physics.wisc.edu/tag/wqi/" rel="tag">WQI</a></span> </footer> </article> <nav 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