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Bose-Einstein condensates in rotating lattices
Rajiv Bhat1, M J Holland, L D Carr
1JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA.
Physical Review Letters
|April 12, 2006
Summary
Strongly interacting bosons in a rotating 2D square lattice exhibit quantum phase transitions. These transitions occur at specific rotation rates, revealing distinct ground-state symmetries in Bose-Einstein condensates.
Area of Science:
- Condensed Matter Physics
- Quantum Mechanics
- Atomic Physics
Background:
- Investigating strongly interacting bosons in rotating lattice potentials is crucial for understanding quantum many-body systems.
- Trapped Bose-Einstein condensates provide a versatile platform for simulating such systems.
Purpose of the Study:
- To investigate quantum phase transitions in strongly interacting bosons within a two-dimensional rotating square lattice.
- To identify the symmetries of the ground states and their dependence on rotation rates.
Main Methods:
- Utilizing a modified Bose-Hubbard Hamiltonian to model the system.
- Simulating a trapped Bose-Einstein condensate with an imprinted rotating lattice potential.
Main Results:
- Observed second-order quantum phase transitions at discrete rotation rates.
- Identified four distinct ground-state symmetries for the square lattice configuration.
Conclusions:
- The study demonstrates the existence of symmetry-breaking quantum phase transitions in rotating 2D bosonic systems.
- The findings offer insights into the rich phase diagrams of interacting quantum matter under rotation.
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