Fast and robust quantum control based on Pauli blocking

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dc.contributor.authorDowdall, Tom
dc.contributor.authorBenseny, Albert
dc.contributor.authorBusch, Thomas
dc.contributor.authorRuschhaupt, Andreas
dc.contributor.funderIrish Research Council
dc.contributor.funderOkinawa Institute of Science and Technology Graduate University
dc.date.accessioned2018-06-15T11:47:06Z
dc.date.available2018-06-15T11:47:06Z
dc.date.issued2017
dc.description.abstractCoherent quantum control over many-particle quantum systems requires high-fidelity dynamics. One way of achieving this is to use adiabatic schemeswhere the system follows an instantaneous eigenstate of the Hamiltonian over time scales that do not allow transitions to other states. This, however, makes control dynamics very slow. Here we introduce another concept that takes advantage of preventing unwanted transitions in fermionic systems by using Pauli blocking: excitations from a protected ground state to higher-lying states are avoided by adding a layer of buffer fermions, such that the protected fermions cannot make a transition to higher-lying excited states because these are already occupied. This allows us to speed up adiabatic evolutions of the system. We do a thorough investigation of the technique, and demonstrate its power by applying it to high-fidelity transport, trap expansion, and splitting in ultracold-atom systems in anharmonic traps. Close analysis of these processes also leads to insights into the structure of the orthogonality catastrophe phenomenon.en
dc.description.sponsorshipIrish Research Council (GOIPG/2015/3195)en
dc.description.statusPeer reviewed
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid43601
dc.identifier.citationDowdall, T., Benseny, A., Busch, T. and Ruschhaupt, A. (2017) 'Fast and robust quantum control based on Pauli blocking', Physical Review A, 96(4), 043601 (8pp). doi: 10.1103/PhysRevA.96.043601en
dc.identifier.doi10.1103/PhysRevA.96.043601
dc.identifier.endpage8
dc.identifier.issn2469-9926
dc.identifier.issued4
dc.identifier.journaltitlePhysical Review Aen
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/6312
dc.identifier.volume96
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.043601
dc.rights© 2017, the Authors. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the Authors. and the published article's title, journal citation, and DOI.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectFermi gasesen
dc.subjectEmissionen
dc.titleFast and robust quantum control based on Pauli blockingen
dc.typeArticle (peer-reviewed)en
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