Hide metadata

dc.date.accessioned2020-05-11T19:51:40Z
dc.date.available2020-05-11T19:51:40Z
dc.date.created2019-06-18T13:36:21Z
dc.date.issued2019
dc.identifier.citationSørdal, Vegard Børve Bergli, Joakim . Quantum particle in a split box: Excitations to the ground state. Physical Review A (PRA). 2019, 99(2), 1-6
dc.identifier.urihttp://hdl.handle.net/10852/75458
dc.description.abstractWe discuss two different approaches for splitting the wave function of a single-particle box (SPB) into two equal parts. Adiabatic insertion of a barrier in the center of a SPB in order to make two compartments which each have probability 1/2 of finding the particle in it is one of the key steps for a Szilard engine. However, any asymmetry between the volume of the compartments due to an off-center insertion of the barrier results in a particle that is fully localized in the larger compartment, in the adiabatic limit. We show that rather than exactly splitting the eigenfunctions in half by a symmetric barrier, one can use a nonadiabatic insertion of an asymmetric barrier to induce excitations to only the first excited state of the full box. As the barrier strength goes to infinity the excited state of the full box becomes the ground state of one of the new boxes. Thus, we can achieve close to exact splitting of the probability between the two compartments using the more realistic nonadiabatic, not perfectly centered barrier, rather than the idealized adiabatic and central barrier normally assumed.
dc.languageEN
dc.publisherAmerican Physical Society
dc.titleQuantum particle in a split box: Excitations to the ground state
dc.typeJournal article
dc.creator.authorSørdal, Vegard Børve
dc.creator.authorBergli, Joakim
cristin.unitcode185,15,4,10
cristin.unitnameKondenserte fasers fysikk
cristin.ispublishedtrue
cristin.qualitycode2
dc.identifier.cristin1705718
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical Review A (PRA)&rft.volume=99&rft.spage=1&rft.date=2019
dc.identifier.jtitlePhysical Review A (PRA)
dc.identifier.volume99
dc.identifier.issue2
dc.identifier.doihttps://doi.org/10.1103/PhysRevA.99.022121
dc.identifier.urnURN:NBN:no-78627
dc.type.documentTidsskriftartikkel
dc.type.peerreviewedPeer reviewed
dc.source.issn2469-9926
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/75458/2/splitBoxPhysRevA.99.022121.pdf
dc.type.versionPublishedVersion
cristin.articleid022121


Files in this item

Appears in the following Collection

Hide metadata