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Quantum signatures of charge flipping vortices in the Bose-Hubbard trimer
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-6708-1560
2016 (English)In: PHYSICAL REVIEW E, ISSN 2470-0045, Vol. 94, no 5, article id 052215Article in journal (Refereed) Published
Abstract [en]

In this work we study quantum signatures of charge flipping vortices, found in the classical discrete nonlinear Schrodinger trimer, by use of the Bose-Hubbard model. We are able to identify such signatures in the quantum energy eigenstates, for instance when comparing the site amplitudes of the classical charge flipping vortices with the probability distribution over different particle configurations. It is also discussed how to construct quantum states that correspond to the classical charge flipping vortices and which effects can lead to deviations between the classical and quantum dynamics. We also examine properties of certain coherent states: classical-like quantum states that can be used to derive the classical model. Several quantum signatures are identified when studying the dynamics of these coherent states, for example, when comparing the average number of particles on a site with the classical site amplitude, when comparing the quantum and classical currents and topological charge, and when studying the evolution of the quantum probability amplitudes. The flipping of the quantum currents are found to be an especially robust feature of these states.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2016. Vol. 94, no 5, article id 052215
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:liu:diva-133265DOI: 10.1103/PhysRevE.94.052215ISI: 000388277300006PubMedID: 27967094OAI: oai:DiVA.org:liu-133265DiVA, id: diva2:1057481
Available from: 2016-12-18 Created: 2016-12-15 Last updated: 2017-01-08

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