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Title: Number-squeezed and fragmented states of strongly interacting bosons in a double well

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1409868
Grant/Contract Number:
AC52-07NA27344
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 96; Journal Issue: 5; Related Information: CHORUS Timestamp: 2017-11-22 10:04:04; Journal ID: ISSN 2469-9926
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Corbo, Joel C., DuBois, Jonathan L., and Whaley, K. Birgitta. Number-squeezed and fragmented states of strongly interacting bosons in a double well. United States: N. p., 2017. Web. doi:10.1103/PhysRevA.96.053627.
Corbo, Joel C., DuBois, Jonathan L., & Whaley, K. Birgitta. Number-squeezed and fragmented states of strongly interacting bosons in a double well. United States. doi:10.1103/PhysRevA.96.053627.
Corbo, Joel C., DuBois, Jonathan L., and Whaley, K. Birgitta. 2017. "Number-squeezed and fragmented states of strongly interacting bosons in a double well". United States. doi:10.1103/PhysRevA.96.053627.
@article{osti_1409868,
title = {Number-squeezed and fragmented states of strongly interacting bosons in a double well},
author = {Corbo, Joel C. and DuBois, Jonathan L. and Whaley, K. Birgitta},
abstractNote = {},
doi = {10.1103/PhysRevA.96.053627},
journal = {Physical Review A},
number = 5,
volume = 96,
place = {United States},
year = 2017,
month =
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 22, 2018
Publisher's Accepted Manuscript

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  • A time-dependent multiconfigurational self-consistent field theory is presented to describe the many-body dynamics of a gas of identical bosonic atoms confined to an external trapping potential at zero temperature from first principles. A set of generalized evolution equations are developed, through the time-dependent variational principle, which account for the complete and self-consistent coupling between the expansion coefficients of each configuration and the underlying one-body wave functions within a restricted two state Fock space basis that includes the full effects of the condensate's mean field as well as atomic correlation. The resulting dynamical equations are a classical Hamiltonian system and, bymore » construction, form a well-defined initial value problem. They are implemented in an efficient numerical algorithm. An example is presented, highlighting the generality of the theory, in which the ballistic expansion of a fragmented condensate ground state is compared to that of a macroscopic quantum superposition state, taken here to be a highly entangled number state, upon releasing the external trapping potential. Strikingly different many-body matter-wave dynamics emerge in each case, accentuating the role of both atomic correlation and mean-field effects in the two condensate states.« less
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  • A Comment on the Letter by Lorenz S. Cederbaum, Alexej I. Streltsov, and Ofir E. Alon, [Phys. Rev. Lett. 100, 040402 (2008)].
  • Bose gases in rotating optical lattices combine two important topics in quantum physics: superfluid rotation and strong correlations. In this paper, we examine square two-dimensional systems at zero temperature comprised of strongly repulsive bosons with filling factors of up to one atom per lattice site. The entry of vortices into the system is characterized by jumps of 2{pi} in the phase winding of the condensate wave function. A lattice of size LxL can have at most L-1 quantized vortices in the lowest Bloch band. In contrast to homogeneous systems, angular momentum is not a good quantum number since the continuousmore » rotational symmetry is broken by the lattice. Instead, a quasiangular momentum captures the discrete rotational symmetry of the system. Energy level crossings indicative of quantum phase transitions are observed when the quasiangular momentum of the ground state changes.« less