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cond-mat.stat-mech2013★ 26 cited
Residual discrete symmetry of the five-state clock model
Seung Ki Baek, Harri Mäkelä, Petter Minnhagen +1
It is well-known that the -state clock model can exhibit a Kosterlitz-Thouless (KT) transition if is equal to or greater than a certain threshold, which has been believed to…
cond-mat.quant-gas2013★ 4 cited
Excitation spectrum of a toroidal spin-1 Bose-Einstein condensate
H. Mäkelä, E. Lundh
We calculate analytically the Bogoliubov excitation spectrum of a toroidal spin-1 Bose-Einstein condensate that is subjected to a homogeneous magnetic field and contains vortices w…