Bose-Einstein Condensates in Rotating Lattices
Rajiv Bhat (1), L. D. Carr (2), M. J. Holland (1) ((1) JILA, National, Institute of Standards, Technology, Department of Physics, University, of Colorado-Boulder, (2) Colorado School of Mines)
TL;DR
This paper investigates strongly interacting bosons in a rotating 2D square lattice using a modified Bose-Hubbard model, revealing quantum phase transitions between states of different symmetries at specific rotation rates.
Contribution
It introduces a modified Bose-Hubbard Hamiltonian to analyze quantum phase transitions in rotating lattice systems, highlighting symmetry changes in the ground state.
Findings
Quantum phase transitions occur at discrete rotation rates.
Four possible ground-state symmetries are identified.
Transitions involve symmetry changes in the system.
Abstract
Strongly interacting bosons in 2D in a rotating square lattice are investigated via a modified Bose-Hubbard Hamiltonian. Such a system corresponds to a rotating lattice potential imprinted on a trapped Bose-Einstein condensate. Second-order quantum phase transitions between states of different symmetries are observed at discrete rotation rates. For the square lattice we study, there are four possible ground-state symmetries.
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