Mostafa Khezri

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He works on modeling, optimizing, and designing superconducting devices, with an emphasis on readout and reset operations. </div> <div class="bhoig__cta glue-grid__col--span-10 glue-grid__col--span-9-md glue-grid__col--span-10-lg"> </div> </div> </div> </section> <section class="offset-two-up --research-areas"> <div class="glue-page glue-grid"> <div class="offset-two-up__left-col glue-grid__col glue-grid__col--span-4-sm glue-grid__col--span-12-md glue-grid__col--span-3-lg"> <h3 class="offset-two-up__headline headline-3">Research Areas</h3> </div> <div class="glue-grid__col glue-grid__col--span-4-sm glue-grid__col--span-12-md glue-grid__col--span-9-lg"> <ul class="card-stack--small nested-glue-grid-override"> <li class="glue-grid__col glue-grid__col--span-6-md glue-grid__col--span-4-sm"> <a class="glue-card not-glue glue-card--small" href="/research-areas/hardware-and-architecture/"> <div class="glue-card__inner"> <div class="glue-card__content"> <div class="content-wrapper"> <p 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<ul class="chipset-list" title="Applied filters"></ul> </div> </div> <div class="publications-list --theme- row-card-list" data-hot-swap="google-publications-list" data-gt-id="publications_list" data-gt-component-name=""> <div class="row-card"> <div class="row-card__container"> <div class="row-card__body"> <a class="row-card__heading headline-6 glue-link" href=https://research.google/pubs/stable-quantum-correlated-many-body-states-through-engineered-dissipation/ > Stable quantum-correlated many-body states through engineered dissipation </a> <div class="row-card__subheading"> <div class="row-card__subheading__item extra-small-text"> Xiao Mi </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alexios Michailidis </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Sara Shabani </div> <div class="row-card__subheading__spacer"></div> <div 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</a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Yu Chen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/108435/"> Pedram Roushan </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Vadim Smelyanskiy </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Dmitry Abanin </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Science, 383 (2024), pp. 1332-1337 </div> </div> </div> <div class="row-card__cta headline-6"> <div class="glue-tooltip" data-glue-tooltip-auto-position="false"> <button class="glue-button glue-button--low-emphasis glue-tooltip__trigger" aria-describedby=tooltip-contentengineered-dissipative-reservoirs tabindex=0 > <span class="js-gt-item-id">Preview</span> </button> <span id="tooltip-contentengineered-dissipative-reservoirs" class="glue-tooltip__content" role="tooltip"> <span data-tooltip-type="simple"> Preview abstract </span> <span data-tooltip-type="rich"> <span class="glue-tooltip__body">Engineered dissipative reservoirs have the potential to steer many-body quantum systems toward correlated steady states useful for quantum simulation of high-temperature superconductivity or quantum magnetism. Using up to 49 superconducting qubits, we prepared low-energy states of the transverse-field Ising model through coupling to dissipative auxiliary qubits. In one dimension, we observed long-range quantum correlations and a ground-state fidelity of 0.86 for 18 qubits at the critical point. In two dimensions, we found mutual information that extends beyond nearest neighbors. Lastly, by coupling the system to auxiliaries emulating reservoirs with different chemical potentials, we explored transport in the quantum Heisenberg model. Our results establish engineered dissipation as a scalable alternative to unitary evolution for preparing entangled many-body states on noisy quantum processors.</span> <a class="glue-button glue-button--low-emphasis" href="https://research.google/pubs/stable-quantum-correlated-many-body-states-through-engineered-dissipation/" > <span class="js-gt-item-id">View details</span> </a> </span> </span> </div> </div> </div> </div> <div class="row-card"> <div class="row-card__container"> <div class="row-card__body"> <a class="row-card__heading headline-6 glue-link" href=https://research.google/pubs/model-based-optimization-of-superconducting-qubit-readout/ > Model-based Optimization of Superconducting Qubit Readout </a> <div class="row-card__subheading"> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/andreasbengtsson/"> Andreas Bengtsson </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alex Opremcak </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/mostafakhezri/"> Mostafa Khezri </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/105029/"> Daniel Sank </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alexandre Bourassa </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/kevinsatzinger/"> Kevin Satzinger </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/sabrinahong/"> Sabrina Hong </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/catherineerickson/"> Catherine Erickson </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/brianlester/"> Brian Lester </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/kevincmiao/"> Kevin Miao </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alexander Korotkov </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/105027/"> Julian Kelly </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Jimmy Chen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/paulklimov/"> Paul Klimov </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Physical Review Letters, 132 (2024), pp. 100603 </div> </div> </div> <div class="row-card__cta headline-6"> <div class="glue-tooltip" data-glue-tooltip-auto-position="false"> <button class="glue-button glue-button--low-emphasis glue-tooltip__trigger" aria-describedby=tooltip-contentmeasurement-is-one-of-the-essentia tabindex=0 > <span class="js-gt-item-id">Preview</span> </button> <span id="tooltip-contentmeasurement-is-one-of-the-essentia" class="glue-tooltip__content" role="tooltip"> <span data-tooltip-type="simple"> Preview abstract </span> <span data-tooltip-type="rich"> <span class="glue-tooltip__body">Measurement is one of the essential components of quantum algorithms, and for superconducting qubits it is often the most error prone. Here, we demonstrate a model-based readout optimization achieving low measurement errors while avoiding detrimental side-effects. For simultaneous and mid-circuit measurements across 17 qubits we observe 1.5% error per qubit with a duration of 500 ns end-to-end and minimal excess reset error from residual resonator photons. We also suppress measurement-induced state transitions and achieve a qubit leakage rate limited by natural heating.This technique can scale to hundreds of qubits, and be used to enhance performance of error-correcting codes as well as near-term applications</span> <a class="glue-button glue-button--low-emphasis" href="https://research.google/pubs/model-based-optimization-of-superconducting-qubit-readout/" > <span class="js-gt-item-id">View details</span> </a> </span> </span> </div> </div> </div> </div> <div class="row-card"> <div class="row-card__container"> <div class="row-card__body"> <a class="row-card__heading headline-6 glue-link" href=https://research.google/pubs/dynamics-of-magnetization-at-infinite-temperature-in-a-heisenberg-spin-chain/ > Dynamics of magnetization at infinite temperature in a Heisenberg spin chain </a> <div class="row-card__subheading"> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/eliottrosenberg/"> Eliott Rosenberg </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Trond Andersen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Rhine Samajdar </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Andre Petukhov </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Jesse Hoke </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Dmitry Abanin </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/andreasbengtsson/"> Andreas Bengtsson </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> ILYA Drozdov </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/catherineerickson/"> Catherine Erickson </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/paulklimov/"> Paul Klimov </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Xiao Mi </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alexis Morvan </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/matthewneeley/"> Matthew Neeley </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Charles Neill </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Rajeev Acharya </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Richard Ross Allen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Kyle Anderson </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Markus Ansmann </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Frank Arute </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Kunal Arya </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/abeasfaw/"> Abe Asfaw </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Juan Atalaya </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/107147/"> Joe Bardin </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/108568/"> Alex Bilmes </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Gina Bortoli </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alexandre Bourassa </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/108058/"> Jenna Bovaird </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Leon Brill </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Michael Broughton </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Bob Buckley </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/106602/"> David Buell </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Tim Burger </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/106859/"> Brian Burkett </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Nicholas Bushnell </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Juan Campero </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Hung-Shen Chang </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Jimmy Chen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Benjamin Chiaro </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Desmond Chik </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Josh Cogan </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Roberto Collins </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Paul Conner </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> William Courtney </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alex Crook </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Ben Curtin </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/107411/"> Dripto Debroy </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/107479/"> Alexander Del Toro Barba </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/107120/"> Sean Demura </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Agustin Di Paolo </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Andrew Dunsworth </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Clint Earle </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Lara Faoro </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Edward Farhi </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Reza Fatemi </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Vinicius Ferreira </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/108076/"> Leslie Flores </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Ebrahim Forati </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/105043/"> Austin Fowler </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Brooks Foxen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Gonzalo Garcia </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Élie Genois </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> William Giang </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/craigmichaelgidney/"> Craig Gidney </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Dar Gilboa </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/marissagiustina/"> Marissa Giustina </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Raja Gosula </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alejo Grajales Dau </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/107228/"> Jonathan Gross </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Steve Habegger </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Michael Hamilton </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Monica Hansen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/106603/"> Matt Harrigan </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Sean Harrington </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Paula Heu </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Gordon Hill </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Markus Hoffmann </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/sabrinahong/"> Sabrina Hong </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Trent Huang </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Ashley Huff </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Bill Huggins </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/107187/"> Lev Ioffe </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Sergei Isakov </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Justin Iveland </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/evanjeffrey/"> Evan Jeffrey </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/105870/"> Zhang Jiang </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Cody Jones </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Pavol Juhas </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/dvirkafri/"> Dvir Kafri </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/107482/"> Tanuj Khattar </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/mostafakhezri/"> Mostafa Khezri </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Marika Kieferova </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/106860/"> Seon Kim </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alexei Kitaev </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Andrey Klots </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Alexander Korotkov </div> <div class="row-card__subheading__spacer"></div> <div 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class="row-card__subheading__item extra-small-text"> Vadim Smelyanskiy </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Vedika Khemani </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Sarang Gopalakrishnan </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Tomaž Prosen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/108435/"> Pedram Roushan </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Science, 384 (2024), pp. 48-53 </div> </div> </div> <div class="row-card__cta headline-6"> <div class="glue-tooltip" data-glue-tooltip-auto-position="false"> <button class="glue-button glue-button--low-emphasis glue-tooltip__trigger" aria-describedby=tooltip-contentunderstanding-universal-aspects-of tabindex=0 > <span class="js-gt-item-id">Preview</span> </button> <span id="tooltip-contentunderstanding-universal-aspects-of" class="glue-tooltip__content" role="tooltip"> <span data-tooltip-type="simple"> Preview abstract </span> <span data-tooltip-type="rich"> <span class="glue-tooltip__body">Understanding universal aspects of quantum dynamics is an unresolved problem in statistical mechanics. In particular, the spin dynamics of the one-dimensional Heisenberg model were conjectured as to belong to the Kardar-Parisi-Zhang (KPZ) universality class based on the scaling of the infinite-temperature spin-spin correlation function. In a chain of 46 superconducting qubits, we studied the probability distribution of the magnetization transferred across the chain’s center, P(M). The first two moments of P(M) show superdiffusive behavior, a hallmark of KPZ universality. However, the third and fourth moments ruled out the KPZ conjecture and allow for evaluating other theories. Our results highlight the importance of studying higher moments in determining dynamic universality classes and provide insights into universal behavior in quantum systems.</span> <a class="glue-button glue-button--low-emphasis" href="https://research.google/pubs/dynamics-of-magnetization-at-infinite-temperature-in-a-heisenberg-spin-chain/" > <span class="js-gt-item-id">View details</span> </a> </span> </span> </div> </div> </div> </div> <div class="row-card"> <div class="row-card__container"> <div class="row-card__body"> <a class="row-card__heading headline-6 glue-link" href=https://research.google/pubs/measurement-induced-entanglement-and-teleportation-on-a-noisy-quantum-processor/ > Measurement-induced entanglement and teleportation on a noisy quantum processor </a> <div class="row-card__subheading"> <div class="row-card__subheading__item extra-small-text"> Jesse Hoke </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> 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<div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/eriklucero/"> Erik Lucero </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Anthony Megrant </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/105027/"> Julian Kelly </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Yu Chen </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Vadim Smelyanskiy </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Xiao Mi </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Vedika Khemani </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> <a class="row-card__small-link" href="/people/108435/"> Pedram Roushan </a> </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Nature, 622 (2023), 481–486 </div> </div> </div> <div class="row-card__cta headline-6"> <div class="glue-tooltip" data-glue-tooltip-auto-position="false"> <button class="glue-button glue-button--low-emphasis glue-tooltip__trigger" aria-describedby=tooltip-contentmeasurement-has-a-special-role-in tabindex=0 > <span class="js-gt-item-id">Preview</span> </button> <span id="tooltip-contentmeasurement-has-a-special-role-in" class="glue-tooltip__content" role="tooltip"> <span data-tooltip-type="simple"> Preview abstract </span> <span data-tooltip-type="rich"> <span class="glue-tooltip__body">Measurement has a special role in quantum theory: by collapsing the wavefunction, it can enable phenomena such as teleportation and thereby alter the ‘arrow of time’ that constrains unitary evolution. When integrated in many-body dynamics, measurements can lead to emergent patterns of quantum information in space–time that go beyond the established paradigms for characterizing phases, either in or out of equilibrium. For present-day noisy intermediate-scale quantum (NISQ) processors, the experimental realization of such physics can be problematic because of hardware limitations and the stochastic nature of quantum measurement. Here we address these experimental challenges and study measurement-induced quantum information phases on up to 70 superconducting qubits. By leveraging the interchangeability of space and time, we use a duality mapping to avoid mid-circuit measurement and access different manifestations of the underlying phases, from entanglement scaling to measurement-induced teleportation. We obtain finite-sized signatures of a phase transition with a decoding protocol that correlates the experimental measurement with classical simulation data. The phases display remarkably different sensitivity to noise, and we use this disparity to turn an inherent hardware limitation into a useful diagnostic. Our work demonstrates an approach to realizing measurement-induced physics at scales that are at the limits of current NISQ processors.</span> <a class="glue-button glue-button--low-emphasis" href="https://research.google/pubs/measurement-induced-entanglement-and-teleportation-on-a-noisy-quantum-processor/" > <span class="js-gt-item-id">View details</span> </a> </span> </span> </div> </div> </div> </div> <div class="row-card"> <div class="row-card__container"> <div class="row-card__body"> <a class="row-card__heading headline-6 glue-link" href=https://research.google/pubs/purification-based-quantum-error-mitigation-of-pair-correlated-electron-simulations/ > Purification-Based Quantum Error Mitigation of Pair-Correlated Electron Simulations </a> <div class="row-card__subheading"> <div class="row-card__subheading__item extra-small-text"> Thomas E O'Brien </div> <div class="row-card__subheading__spacer"></div> <div class="row-card__subheading__item extra-small-text"> Gian-Luca R. 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Prior to fault-tolerant quantum computing, robust error mitigation strategies are necessary to continue this growth. Here, we study physical simulation within the seniority-zero electron pairing subspace, which affords both a computational stepping stone to a fully correlated model, and an opportunity to validate recently introduced ``purification-based'' error-mitigation strategies. We compare the performance of error mitigation based on doubling quantum resources in time (echo verification) or in space (virtual distillation), on up to 20 qubits of a superconducting qubit quantum processor. We observe a reduction of error by one to two orders of magnitude below less sophisticated techniques (e.g. post-selection); the gain from error mitigation is seen to increase with the system size. Employing these error mitigation strategies enables the implementation of the largest variational algorithm for a correlated chemistry system to-date. Extrapolating performance from these results allows us to estimate minimum requirements for a beyond-classical simulation of electronic structure. We find that, despite the impressive gains from purification-based error mitigation, significant hardware improvements will be required for classically intractable variational chemistry simulations.</span> <a class="glue-button glue-button--low-emphasis" href="https://research.google/pubs/purification-based-quantum-error-mitigation-of-pair-correlated-electron-simulations/" > <span class="js-gt-item-id">View details</span> </a> </span> </span> </div> </div> </div> </div> </div> <div class="filtered-list-base__pagination" data-hot-swap="pagination"> </div> </div> </div> </section> <section class="google_scholar_search">  <a href="#" class="js-google-scholar-search-link glue-button glue-button--low-emphasis glue-button--icon" title="See more related publications on Google Scholar" target="_blank"> <svg role="presentation" aria-hidden="true" class="glue-icon glue-icon--24px "> <use href="/gr/static/assets/icons/glue-icons.svg#open-in-new"></use> </svg> Search on Google Scholar </a> 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