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cond-mat.stat-mech2001
Hidden topological order in Bose-Einstein Condensates
Fei Zhou
We show the existence of a new hidden topological order in (F=1) Bose-Einstein condensates (BEC) with antiferromagnetic interactions. Occurrence of this order is due to t…
cond-mat.stat-mech2001
Spin-1/2 Collective Excitations in BEC of Interacting Spin-1 Atoms
Fei Zhou
We construct spin-1/2 collective excitations in BEC of interacting spin-1 atoms. These excitations exist in states with a maximal global degeneracy. The stability and energy of the…