Tuesday, January 22, 2013

1212.4952 (Kenichi Kasamatsu et al.)

Local Gauge Symmetry and its Breaking as Higgs Couplings in Atomic
Quantum Simulation of Dynamical Gauge Fields

Kenichi Kasamatsu, Ikuo Ichinose, Tetsuo Matsui
Recently, the possibility of atomic quantum simulation of dynamical gauge fields was pointed out. In this simulation, a system of cold atoms trapped on each link in an optical lattice is regarded as a simulator of a U(1) lattice gauge model under certain conditions. However to implement local gauge invariance, a fine tunning of interaction parameters among atoms is necessary. We consider a general cold-atom system with this fine tuning being relaxed and investigate the effect of gauge-symmetry breaking. In this study, we reveal the fact that a wide variety of cold atoms put on the links of an optical lattice are still to be a faithful quantum simulator for a lattice U(1) gauge-Higgs model containing a Higgs field sitting on site. Physical meaning of the Higgs phase in various quantum simulators is also discussed.
View original: http://arxiv.org/abs/1212.4952

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