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arXiv 1409.7016cond-mat.quant-gas
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强相互作用玻色子在两条腿阶梯上的涡旋相和Meissner相

Vortex and Meissner phases of strongly-interacting bosons on a two-leg ladder

M. Piraud, F. Heidrich-Meisner, I. P. McCulloch, S. Greschner, T. Vekua, U. Schollwoeck

摘要:

本文建立了具有均匀通量的强相互作用玻色-哈伯德模型的相图。我们的工作是由最近的一个实验[阿塔拉等人,Nature Phys.10,588(2014)],其在弱相互作用的互补体系中研究了相同的系统。基于广泛的密度矩阵重整化群模拟和玻色化分析,我们充分探讨了填充,腿间隧穿和通量跨越的参数空间。作为一个主要的结果,我们证明了无隙和带隙迈斯纳和涡旋相的存在,与带隙状态出现在莫特绝缘制度。我们计算实验上可获得的可观测量值,例如手征电流和涡旋模式。

英文摘要:

We establish the phase diagram of the strongly-interacting Bose-Hubbard model defined on a two-leg ladder geometry in the presence of a homogeneous flux. Our work is motivated by a recent experiment [Atala et al., Nature Phys. 10, 588 (2014)], which studied the same system, in the complementary regime of weak interactions. Based on extensive density matrix renormalization group simulations and a bosonization analysis, we fully explore the parameter space spanned by filling, inter-leg tunneling, and flux. As a main result, we demonstrate the existence of gapless and gapped Meissner and vortex phases, with the gapped states emerging in Mott-insulating regimes. We calculate experimentally accessible observables such as chiral currents and vortex patterns.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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