Spectral structure and many-body dynamics of ultracold bosons in a double-well

Abstract: We examine the spectral structure and many-body dynamics of two and three repulsively interacting bosons trapped in a one-dimensional double-well, for variable barrier height, inter-particle interaction strength, and initial conditions. By exact diagonalization of the many-particle Hamiltonian, we specifically explore the dynamical behavior of the particles launched either at the single-particle ground state or saddle-point energy, in a time-independent potential. We complement these results by a characterization of the cross-over from diabatic to quasi-adiabatic evolution under finite-time switching of the potential barrier, via the associated time evolution of a single particle’s von Neumann entropy. This is achieved with the help of the multiconfigurational time-dependent Hartree method for indistinguishable particles (MCTDH-X)—which also allows us to extrapolate our results for increasing particle numbers

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch
Notes
Entropy. - 22, 4 (2020) , 382, ISSN: 1099-4300

Keyword
Bose-Einstein-Kondensation

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2020
Creator
Schäfer, Frank
Bastarrachea-Magnani, Miguel A.
Lode, Axel U. J.
Forges de Parny, Laurent de
Buchleitner, Andreas

DOI
10.3390/e22040382
URN
urn:nbn:de:bsz:25-freidok-1554117
Rights
Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
25.03.2025, 1:45 PM CET

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Associated

Time of origin

  • 2020

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