【摘 要】
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The quantum phase of hard-core bosons in Creutz ladder with zero flux is studied. For a specific regime of the parameters (tx=tp,ty0, the system is exactly stud
【机 构】
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Department of Physics, Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry o
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The quantum phase of hard-core bosons in Creutz ladder with zero flux is studied. For a specific regime of the parameters (tx=tp,ty0, the system is exactly studied using quantum Monte Carlo (QMC) method without a sign problem. It is found that the system is a Mott insulator for small t p and a quantum phase transition to a superfluid phase is driven by increasing tp. The critical tcp is determined precisely by a scaling analysis. Since it is possible that the Creutz ladder is realized experimentally, the theoretical results are interesting to the cold-atom experiments.
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