Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-07-06
Physics
Condensed Matter
Quantum Gases
published version
Scientific paper
10.1103/PhysRevA.83.013620
We use entanglement to investigate the transition from vortex liquid phase to vortex lattice phase in weakly interacting rotating Bose-Einstein condensate (BEC). Ground state entanglement spectrum is analyzed to distinguish these two different phases. For the torus geometry, the low-lying part of ground state entanglement spectrum, as well as the behavior of its lowest level change clearly when the transition occurs. For the sphere geometry, the disappearance of entanglement gap in the conformal limit (CL) can indicate this transition. We also show that the decrease of entanglement between particles can be regarded as a signal of the transition.
Fan Heng
Guo Hong-Li
Liu Zhao
Vedral Vlatko
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