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Title: Emergence of a new pair-coherent phase in many-body quenches of repulsive bosons

Abstract

We investigate the dynamical mode population statistics and associated first- and second-order coherence of an interacting bosonic two-mode model when the pair-exchange coupling is quenched from negative to positive values. It is shown that for moderately rapid second-order transitions, a new pair-coherent phase emerges on the positive coupling side in an excited state, which is not fragmented as the ground-state single-particle density matrix would prescribe it to be.

Authors:
; ;  [1]
  1. Seoul National University, Department of Physics and Astronomy, Center for Theoretical Physics, 151-747 Seoul (Korea, Republic of)
Publication Date:
OSTI Identifier:
22038569
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; BOSONS; DENSITY MATRIX; EXCITED STATES; GROUND STATES; INTERACTING BOSON MODEL; MANY-BODY PROBLEM

Citation Formats

Fischer, Uwe R., Lee, Kang-Soo, and Xiong Bo. Emergence of a new pair-coherent phase in many-body quenches of repulsive bosons. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.011604.
Fischer, Uwe R., Lee, Kang-Soo, & Xiong Bo. Emergence of a new pair-coherent phase in many-body quenches of repulsive bosons. United States. doi:10.1103/PHYSREVA.84.011604.
Fischer, Uwe R., Lee, Kang-Soo, and Xiong Bo. Fri . "Emergence of a new pair-coherent phase in many-body quenches of repulsive bosons". United States. doi:10.1103/PHYSREVA.84.011604.
@article{osti_22038569,
title = {Emergence of a new pair-coherent phase in many-body quenches of repulsive bosons},
author = {Fischer, Uwe R. and Lee, Kang-Soo and Xiong Bo},
abstractNote = {We investigate the dynamical mode population statistics and associated first- and second-order coherence of an interacting bosonic two-mode model when the pair-exchange coupling is quenched from negative to positive values. It is shown that for moderately rapid second-order transitions, a new pair-coherent phase emerges on the positive coupling side in an excited state, which is not fragmented as the ground-state single-particle density matrix would prescribe it to be.},
doi = {10.1103/PHYSREVA.84.011604},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}