Low-Temperature Properties of the Fermionic Mixtures with Mass Imbalance in Optical Lattice
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概要
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We study the attractive Hubbard model with mass imbalance to clarify the low-temperature properties of fermionic mixtures in an optical lattice. By combining dynamical mean-field theory with continuous-time quantum Monte Carlo simulation, we discuss the competition between the superfluid and density wave states at half filling. By calculating the energy and order parameter for each state, we clarify that the coexisting (supersolid) state, where the density wave and superfluid states are degenerate, is realized in the system. We then determine the phase diagram at finite temperatures.
- 2012-06-15
著者
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Koga Akihisa
Department Of Applied Physics Osaka University
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Takemori Nayuta
Department of Physics, Tokyo Institute of Technology, Megro, Tokyo 152-8551, Japan
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Koga Akihisa
Department of Physics, Tokyo Institute of Technology, Megro, Tokyo 152-8551, Japan
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