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arXiv 1402.0852cond-mat.softcond-mat.stat-mech
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单分散团簇晶体:经典和量子动力学

Monodisperse cluster crystals: classical and quantum dynamics

Rogelio Diaz-Mendez, Fabio Mezzacapo, Fabio Cinti, Wolfgang Lechner, Guido Pupillo

摘要:

我们研究了在两个空间维度上通过软核势相互作用的单分散粒子气体的相和动力学,这对于软物质胶体系统和量子原子气体是有意义的。使用精确的理论方法,我们证明了平衡低温经典相同时打破连续平移对称性和动态时空均匀性,其缺乏通常与平衡玻璃化现象。这导致了一种奇异的自组装簇晶体,它具有共存的类液体长时间动力学特性,这对应于超固体行为的经典模拟。我们证明了量子涨落和玻色子统计对团簇玻璃晶体的影响是独立和竞争的:零点运动往往会破坏晶体秩序,这可以通过玻色子统计来恢复。

英文摘要:

We study the phases and dynamics of a gas of monodisperse particles interacting via soft-core potentials in two spatial dimensions, which is of interest for soft-matter colloidal systems and quantum atomic gases. Using exact theoretical methods, we demonstrate that the equilibrium low-temperature classical phase simultaneously breaks continuous translational symmetry and dynamic space-time homogeneity, whose absence is usually associated with out-of-equilibrium glassy phenomena. This results in an exotic self-assembled cluster crystal with coexisting liquid-like long-time dynamical properties, which corresponds to a classical analog of supersolid behavior. We demonstrate that the effects of quantum fluctuations and bosonic statistics on cluster-glassy crystals are separate and competing: zero-point motion tends to destabilize crystalline order, which can be restored by bosonic statistics.

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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