Superposition states at finite temperature

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dc.contributor.author Huyet, Guillaume
dc.contributor.author Franke-Arnold, Sonja
dc.contributor.author Barnett, Stephen M.
dc.date.accessioned 2017-08-29T09:04:00Z
dc.date.available 2017-08-29T09:04:00Z
dc.date.issued 2001
dc.identifier.citation Huyet, G., Franke-Arnold, S. and Barnett, S. M. (2001) 'Superposition states at finite temperature', Physical Review A, 63(4), 043812 (7pp). doi: 10.1103/PhysRevA.63.043812 en
dc.identifier.volume 63
dc.identifier.issued 4
dc.identifier.issn 1050-2947
dc.identifier.uri http://hdl.handle.net/10468/4562
dc.identifier.doi 10.1103/PhysRevA.63.043812
dc.description.abstract We describe a method to create superposition states from a mixed state of a harmonic oscillator. If the initial state is described by a thermal state, then the resulting superposition state will be a "hot'' superposition state. Such a state can be distinguished from a statistical mixture by its coherence properties. Here we suggest how to demonstrate the coherence of the superposition state by observing interference fringes when the two parts of the wave packet are overlapped. In the case of the mixed superposition state, a partial overlap may not be sufficient to observe the presence of fringes. We introduce therefore the idea of a coherence length for the wave packet and demonstrate its relevance for interferometry of mixed states. We illustrate our ideas with the example of superposition states for the motion of a single trapped ion. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society en
dc.relation.uri https://journals.aps.org/pra/abstract/10.1103/PhysRevA.63.043812
dc.rights © 2001, American Physical Society en
dc.subject Quantum jumps en
dc.subject Thermal noise en
dc.subject Trapped atom en
dc.title Superposition states at finite temperature en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Guillaume Huyet, Physics, University College Cork, Cork, Ireland. +353-21-490-3000. Email: huyet@phys.ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.internal.wokid WOS:000168095300118
dc.description.status Peer reviewed en
dc.identifier.journaltitle Physical Review A en
dc.internal.IRISemailaddress huyet@phys.ucc.ie en
dc.identifier.articleid 43812


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