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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.15635">arXiv:2006.15635</a> <span> [<a href="https://arxiv.org/pdf/2006.15635">pdf</a>, <a href="https://arxiv.org/format/2006.15635">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Plasma Physics">physics.plasm-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.hedp.2021.100928">10.1016/j.hedp.2021.100928 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Comparison of ablators for the polar direct drive exploding pusher platform </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Whitley%2C+H+D">Heather D. Whitley</a>, <a href="/search/physics?searchtype=author&query=Kemp%2C+G+E">G. Elijah Kemp</a>, <a href="/search/physics?searchtype=author&query=Yeamans%2C+C">Charles Yeamans</a>, <a href="/search/physics?searchtype=author&query=Walters%2C+Z">Zachary Walters</a>, <a href="/search/physics?searchtype=author&query=Blue%2C+B+E">Brent E. Blue</a>, <a href="/search/physics?searchtype=author&query=Garbett%2C+W">Warren Garbett</a>, <a href="/search/physics?searchtype=author&query=Schneider%2C+M">Marilyn Schneider</a>, <a href="/search/physics?searchtype=author&query=Craxton%2C+R+S">R. Stephen Craxton</a>, <a href="/search/physics?searchtype=author&query=Garcia%2C+E+M">Emma M. Garcia</a>, <a href="/search/physics?searchtype=author&query=McKenty%2C+P+W">Patrick W. McKenty</a>, <a href="/search/physics?searchtype=author&query=Gatu-Johnson%2C+M">Maria Gatu-Johnson</a>, <a href="/search/physics?searchtype=author&query=Caspersen%2C+K">Kyle Caspersen</a>, <a href="/search/physics?searchtype=author&query=Castor%2C+J+I">John I. Castor</a>, <a href="/search/physics?searchtype=author&query=D%C3%A4ne%2C+M">Markus D盲ne</a>, <a href="/search/physics?searchtype=author&query=Ellison%2C+C+L">C. Leland Ellison</a>, <a href="/search/physics?searchtype=author&query=Gaffney%2C+J">James Gaffney</a>, <a href="/search/physics?searchtype=author&query=Graziani%2C+F+R">Frank R. Graziani</a>, <a href="/search/physics?searchtype=author&query=Klepeis%2C+J">John Klepeis</a>, <a href="/search/physics?searchtype=author&query=Kostinski%2C+N">Natalie Kostinski</a>, <a href="/search/physics?searchtype=author&query=Kritcher%2C+A">Andrea Kritcher</a>, <a href="/search/physics?searchtype=author&query=Lahmann%2C+B">Brandon Lahmann</a>, <a href="/search/physics?searchtype=author&query=Lazicki%2C+A+E">Amy E. Lazicki</a>, <a href="/search/physics?searchtype=author&query=Le%2C+H+P">Hai P. Le</a>, <a href="/search/physics?searchtype=author&query=London%2C+R+A">Richard A. London</a>, <a href="/search/physics?searchtype=author&query=Maddox%2C+B">Brian Maddox</a> , et al. (14 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.15635v2-abstract-short" style="display: inline;"> We examine the performance of pure boron, boron carbide, high density carbon, and boron nitride ablators in the polar direct drive exploding pusher (PDXP) platform. The platform uses the polar direct drive configuration at the National Ignition Facility to drive high ion temperatures in a room temperature capsule and has potential applications for plasma physics studies and as a neutron source. Th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.15635v2-abstract-full').style.display = 'inline'; document.getElementById('2006.15635v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.15635v2-abstract-full" style="display: none;"> We examine the performance of pure boron, boron carbide, high density carbon, and boron nitride ablators in the polar direct drive exploding pusher (PDXP) platform. The platform uses the polar direct drive configuration at the National Ignition Facility to drive high ion temperatures in a room temperature capsule and has potential applications for plasma physics studies and as a neutron source. The higher tensile strength of these materials compared to plastic enables a thinner ablator to support higher gas pressures, which could help optimize its performance for plasma physics experiments, while ablators containing boron enable the possiblity of collecting addtional data to constrain models of the platform. Applying recently developed and experimentally validated equation of state models for the boron materials, we examine the performance of these materials as ablators in 2D simulations, with particular focus on changes to the ablator and gas areal density, as well as the predicted symmetry of the inherently 2D implosion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.15635v2-abstract-full').style.display = 'none'; document.getElementById('2006.15635v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LLNL-JRNL-803851 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1510.00409">arXiv:1510.00409</a> <span> [<a href="https://arxiv.org/pdf/1510.00409">pdf</a>, <a href="https://arxiv.org/ps/1510.00409">ps</a>, <a href="https://arxiv.org/format/1510.00409">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="General Physics">physics.gen-ph</span> </div> </div> <p class="title is-5 mathjax"> A linear time quantum algorithm for 3SAT using irreversible quantum operations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1510.00409v6-abstract-short" style="display: inline;"> The Deutsch model of quantum computation is extended to allow for thermodynamically irreversible operations by allowing the system of interest to interact with an outside reservoir. A set of irreversible logical error correction superoperators are constructed which allow the rapid concentration of probability from an exponentially large search space into a small number of logically defined states.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.00409v6-abstract-full').style.display = 'inline'; document.getElementById('1510.00409v6-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1510.00409v6-abstract-full" style="display: none;"> The Deutsch model of quantum computation is extended to allow for thermodynamically irreversible operations by allowing the system of interest to interact with an outside reservoir. A set of irreversible logical error correction superoperators are constructed which allow the rapid concentration of probability from an exponentially large search space into a small number of logically defined states. These capabilities are used to construct a linear time solution algorithm for the NP complete problem 3SAT. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.00409v6-abstract-full').style.display = 'none'; document.getElementById('1510.00409v6-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1305.0126">arXiv:1305.0126</a> <span> [<a href="https://arxiv.org/pdf/1305.0126">pdf</a>, <a href="https://arxiv.org/ps/1305.0126">ps</a>, <a href="https://arxiv.org/format/1305.0126">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> </div> <p class="title is-5 mathjax"> Strong Field Ionization as an Inhomogeneous Schroedinger Equation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a>, <a href="/search/physics?searchtype=author&query=Rost%2C+J">Jan-Michael Rost</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1305.0126v1-abstract-short" style="display: inline;"> Strong field ionization is difficult to treat theoretically due to the simultaneous need to treat bound state dynamics accurately and continuum dynamics efficiently. We address this problem by decomposing the time dependent Schroedinger equation (TDSE) into an inhomogeneous form, in which a precomputed bound state acts as a source term for a time dependent tunneling component. The resulting theory… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1305.0126v1-abstract-full').style.display = 'inline'; document.getElementById('1305.0126v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1305.0126v1-abstract-full" style="display: none;"> Strong field ionization is difficult to treat theoretically due to the simultaneous need to treat bound state dynamics accurately and continuum dynamics efficiently. We address this problem by decomposing the time dependent Schroedinger equation (TDSE) into an inhomogeneous form, in which a precomputed bound state acts as a source term for a time dependent tunneling component. The resulting theory is equivalent to the full TDSE when exact propagation is used, and reduces or eliminates a major source of wavefunction error when propagation is approximated. The gauge invariance of the resulting theory is used to clarify an apparent gauge dependence which has long been observed in the context of strong field S-matrix theory. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1305.0126v1-abstract-full').style.display = 'none'; document.getElementById('1305.0126v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 May, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2013. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1208.2558">arXiv:1208.2558</a> <span> [<a href="https://arxiv.org/pdf/1208.2558">pdf</a>, <a href="https://arxiv.org/ps/1208.2558">ps</a>, <a href="https://arxiv.org/format/1208.2558">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevE.90.042710">10.1103/PhysRevE.90.042710 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quantum dynamics of the avian compass </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1208.2558v4-abstract-short" style="display: inline;"> The ability of migratory birds to orient relative to the Earth's magnetic field is believed to involve a coherent superposition of two spin states of a radical electron pair. However, the mechanism by which this coherence can be maintained in the face of strong interactions with the cellular environment has remained unclear. This Letter addresses the problem of decoherence between two electron spi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1208.2558v4-abstract-full').style.display = 'inline'; document.getElementById('1208.2558v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1208.2558v4-abstract-full" style="display: none;"> The ability of migratory birds to orient relative to the Earth's magnetic field is believed to involve a coherent superposition of two spin states of a radical electron pair. However, the mechanism by which this coherence can be maintained in the face of strong interactions with the cellular environment has remained unclear. This Letter addresses the problem of decoherence between two electron spins due to hyperfine interaction with a bath of spin 1/2 nuclei. Dynamics of the radical pair density matrix are derived and shown to yield a simple mechanism for sensing magnetic field orientation. Rates of dephasing and decoherence are calculated ab initio and found to yield millisecond coherence times, consistent with behavioral experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1208.2558v4-abstract-full').style.display = 'none'; document.getElementById('1208.2558v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 August, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. E 90, 042710 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1111.4363">arXiv:1111.4363</a> <span> [<a href="https://arxiv.org/pdf/1111.4363">pdf</a>, <a href="https://arxiv.org/ps/1111.4363">ps</a>, <a href="https://arxiv.org/format/1111.4363">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> An efficient parallel method for relaxing to the minimum action wavefunction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1111.4363v1-abstract-short" style="display: inline;"> Efficient and accurate numerical propagation of the time dependent Schroedinger equation is a problem with applications across a wide range of physics. This paper develops an efficient, trivially parallelizeable method for relaxing a trial wavefunction toward a variationally optimum propagated wavefunction which minimizes the propagation error relative to a platonic wavefunction which obeys the ti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.4363v1-abstract-full').style.display = 'inline'; document.getElementById('1111.4363v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1111.4363v1-abstract-full" style="display: none;"> Efficient and accurate numerical propagation of the time dependent Schroedinger equation is a problem with applications across a wide range of physics. This paper develops an efficient, trivially parallelizeable method for relaxing a trial wavefunction toward a variationally optimum propagated wavefunction which minimizes the propagation error relative to a platonic wavefunction which obeys the time dependent Schroedinger equation exactly. This method is shown to be well suited for incorporation with multigrid methods, yielding rapid convergence to a minimum action solution even for Hamiltonians which are not positive definite. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.4363v1-abstract-full').style.display = 'none'; document.getElementById('1111.4363v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2011. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1108.5297">arXiv:1108.5297</a> <span> [<a href="https://arxiv.org/pdf/1108.5297">pdf</a>, <a href="https://arxiv.org/ps/1108.5297">ps</a>, <a href="https://arxiv.org/format/1108.5297">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Biological Physics">physics.bio-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Quantum Coherent Dynamics at Ambient Temperature in Photosynthetic Molecules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1108.5297v1-abstract-short" style="display: inline;"> Photosynthetic antenna complexes are responsible for absorbing energy from sunlight and transmitting it to remote locations where it can be stored. Recent experiments have found that this process involves long-lived quantum coherence between pigment molecules, called chromophores, which make up these complexes. Expected to decay within 100 fs at room temperature, these coherences were instead foun… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.5297v1-abstract-full').style.display = 'inline'; document.getElementById('1108.5297v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1108.5297v1-abstract-full" style="display: none;"> Photosynthetic antenna complexes are responsible for absorbing energy from sunlight and transmitting it to remote locations where it can be stored. Recent experiments have found that this process involves long-lived quantum coherence between pigment molecules, called chromophores, which make up these complexes. Expected to decay within 100 fs at room temperature, these coherences were instead found to persist for picosecond time scales, despite having no apparent isolation from the thermal environment of the cell. This paper derives a quantum master equation which describes the coherent evolution of a system in strong contact with a thermal environment. Conditions necessary for long coherence lifetimes are identified, and the role of coherence in efficient energy transport is illuminated. Static spectra and exciton transfer rates for the PE545 complex of the cryptophyte algae CS24 are calculated and shown to have good agreement with experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.5297v1-abstract-full').style.display = 'none'; document.getElementById('1108.5297v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 August, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2011. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1007.3381">arXiv:1007.3381</a> <span> [<a href="https://arxiv.org/pdf/1007.3381">pdf</a>, <a href="https://arxiv.org/ps/1007.3381">ps</a>, <a href="https://arxiv.org/format/1007.3381">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mathematical Physics">math-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.cpc.2010.12.030">10.1016/j.cpc.2010.12.030 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Efficient wavefunction propagation by minimizing accumulated action </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1007.3381v3-abstract-short" style="display: inline;"> This paper presents a new technique to calculate the evolution of a quantum wavefunction in a chosen spatial basis by minimizing the accumulated action. Introduction of a finite temporal basis reduces the problem to a set of linear equations, while an appropriate choice of temporal basis set offers improved convergence relative to methods based on matrix exponentiation for a class of physically re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1007.3381v3-abstract-full').style.display = 'inline'; document.getElementById('1007.3381v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1007.3381v3-abstract-full" style="display: none;"> This paper presents a new technique to calculate the evolution of a quantum wavefunction in a chosen spatial basis by minimizing the accumulated action. Introduction of a finite temporal basis reduces the problem to a set of linear equations, while an appropriate choice of temporal basis set offers improved convergence relative to methods based on matrix exponentiation for a class of physically relevant problems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1007.3381v3-abstract-full').style.display = 'none'; document.getElementById('1007.3381v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 August, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 July, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Computer Physics Communications Volume 182, Issue 4, April 2011, Pages 935-939 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0908.0896">arXiv:0908.0896</a> <span> [<a href="https://arxiv.org/pdf/0908.0896">pdf</a>, <a href="https://arxiv.org/ps/0908.0896">ps</a>, <a href="https://arxiv.org/format/0908.0896">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.chemphys.2009.09.022">10.1016/j.chemphys.2009.09.022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Vibrational interference of Raman and high-harmonic generation pathways </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a>, <a href="/search/physics?searchtype=author&query=Tonzani%2C+S">Stefano Tonzani</a>, <a href="/search/physics?searchtype=author&query=Greene%2C+C+H">Chris H. Greene</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0908.0896v1-abstract-short" style="display: inline;"> Experiments have shown that the internal vibrational state of a molecule can affect the intensity of high harmonic light generated from that molecule. This paper presents a model which explains this modulation in terms of interference between different vibrational states occurring during the high harmonic process. In addition, a semiclassical model of the continuum electron propagation is develo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0908.0896v1-abstract-full').style.display = 'inline'; document.getElementById('0908.0896v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0908.0896v1-abstract-full" style="display: none;"> Experiments have shown that the internal vibrational state of a molecule can affect the intensity of high harmonic light generated from that molecule. This paper presents a model which explains this modulation in terms of interference between different vibrational states occurring during the high harmonic process. In addition, a semiclassical model of the continuum electron propagation is developed which connects with rigorous treatments of the electron-ion scattering. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0908.0896v1-abstract-full').style.display = 'none'; document.getElementById('0908.0896v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 August, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2009. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0804.1958">arXiv:0804.1958</a> <span> [<a href="https://arxiv.org/pdf/0804.1958">pdf</a>, <a href="https://arxiv.org/ps/0804.1958">ps</a>, <a href="https://arxiv.org/format/0804.1958">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/jp8031226">10.1021/jp8031226 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Limits of the Plane Wave Approximation in the Measurement of Molecular Properties </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a>, <a href="/search/physics?searchtype=author&query=Tonzani%2C+S">Stefano Tonzani</a>, <a href="/search/physics?searchtype=author&query=Greene%2C+C+H">Chris H. Greene</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0804.1958v1-abstract-short" style="display: inline;"> Rescattering electrons offer great potential as probes of molecular properties on ultrafast timescales. The most famous example is molecular tomography, in which high harmonic spectra of oriented molecules are mapped to ``tomographic images'' of the relevant molecular orbitals. The accuracy of such reconstructions may be greatly affected by the distortion of scattering wavefunctions from their a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0804.1958v1-abstract-full').style.display = 'inline'; document.getElementById('0804.1958v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0804.1958v1-abstract-full" style="display: none;"> Rescattering electrons offer great potential as probes of molecular properties on ultrafast timescales. The most famous example is molecular tomography, in which high harmonic spectra of oriented molecules are mapped to ``tomographic images'' of the relevant molecular orbitals. The accuracy of such reconstructions may be greatly affected by the distortion of scattering wavefunctions from their asymptotic forms due to interactions with the parent ion. We investigate the validity of the commonly used plane wave approximation in molecular tomography, showing how such distortions affect the resulting orbital reconstructions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0804.1958v1-abstract-full').style.display = 'none'; document.getElementById('0804.1958v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 April, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2008. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0701113">arXiv:physics/0701113</a> <span> [<a href="https://arxiv.org/pdf/physics/0701113">pdf</a>, <a href="https://arxiv.org/ps/physics/0701113">ps</a>, <a href="https://arxiv.org/format/physics/0701113">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/0953-4075/40/18/F01">10.1088/0953-4075/40/18/F01 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High Harmonic Generation in SF$_{6}$: Raman-excited Vibrational Quantum Beats </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a>, <a href="/search/physics?searchtype=author&query=Tonzani%2C+S">Stefano Tonzani</a>, <a href="/search/physics?searchtype=author&query=Greene%2C+C+H">Chris H. Greene</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="physics/0701113v1-abstract-short" style="display: inline;"> In a recent experiment (N. Wagner et al., PNAS v103, p13279) on SF$_{6}$, a high-harmonic generating laser pulse is preceded by a pump pulse which stimulates Raman-active modes in the molecule. Varying the time delay between the two pulses modulates high harmonic intensity, with frequencies equal to the vibration frequencies of the Raman-active modes. We propose an explanation of this modulation… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0701113v1-abstract-full').style.display = 'inline'; document.getElementById('physics/0701113v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0701113v1-abstract-full" style="display: none;"> In a recent experiment (N. Wagner et al., PNAS v103, p13279) on SF$_{6}$, a high-harmonic generating laser pulse is preceded by a pump pulse which stimulates Raman-active modes in the molecule. Varying the time delay between the two pulses modulates high harmonic intensity, with frequencies equal to the vibration frequencies of the Raman-active modes. We propose an explanation of this modulation as a quantum interference between competing pathways that occur via adjacent vibrational states of the molecule. The Raman and high harmonic processes act as beamsplitters, producing vibrational quantum beats among the Raman-active vibrational modes that are excited by the first pulse. We introduce a rigorous treatment of the electron-ion recombination process and the effect of the ionic Coulomb field in the electron propagation outside the molecule, improving over the widely-used three-step model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0701113v1-abstract-full').style.display = 'none'; document.getElementById('physics/0701113v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 January, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2007. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">submitted to PRL</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/physics/0510187">arXiv:physics/0510187</a> <span> [<a href="https://arxiv.org/pdf/physics/0510187">pdf</a>, <a href="https://arxiv.org/ps/physics/0510187">ps</a>, <a href="https://arxiv.org/format/physics/0510187">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevA.74.043204">10.1103/PhysRevA.74.043204 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Interaction of intense vuv radiation with large xenon clusters </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Walters%2C+Z+B">Zachary B. Walters</a>, <a href="/search/physics?searchtype=author&query=Santra%2C+R">Robin Santra</a>, <a href="/search/physics?searchtype=author&query=Greene%2C+C+H">Chris H. Greene</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="physics/0510187v3-abstract-short" style="display: inline;"> The interaction of atomic clusters with short, intense pulses of laser light to form extremely hot, dense plasmas has attracted extensive experimental and theoretical interest. The high density of atoms within the cluster greatly enhances the atom--laser interaction, while the finite size of the cluster prevents energy from escaping the interaction region. Recent technological advances have allo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0510187v3-abstract-full').style.display = 'inline'; document.getElementById('physics/0510187v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="physics/0510187v3-abstract-full" style="display: none;"> The interaction of atomic clusters with short, intense pulses of laser light to form extremely hot, dense plasmas has attracted extensive experimental and theoretical interest. The high density of atoms within the cluster greatly enhances the atom--laser interaction, while the finite size of the cluster prevents energy from escaping the interaction region. Recent technological advances have allowed experiments to probe the laser--cluster interaction at very high photon energies, with interactions much stronger than suggested by theories for lower photon energies. We present a model of the laser--cluster interaction which uses non-perturbative R-matrix techniques to calculate inverse bremsstrahlung and photoionization cross sections for Herman-Skillman atomic potentials. We describe the evolution of the cluster under the influence of the processes of inverse bremsstrahlung heating, photoionization, collisional ionization and recombination, and expansion of the cluster. We compare charge state distribution, charge state ejection energies, and total energy absorbed with the Hamburg experiment of Wabnitz {\em et al.} [Nature {\bf 420}, 482 (2002)] and ejected electron spectra with Laarmann {\em et al.} [Phys. Rev. Lett. {\bf 95}, 063402 (2005)]. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('physics/0510187v3-abstract-full').style.display = 'none'; document.getElementById('physics/0510187v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 April, 2006; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 October, 2005; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2005. </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a 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