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arXiv 1010.4576quant-phcond-mat.stat-mech
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相互作用粒子系统的信息传播

Information propagation for interacting particle systems

Norbert Schuch, Sarah K. Harrison, Tobias J. Osborne, Jens Eisert

摘要:

我们证明了晶格模型中相互作用量子粒子的激发总是以有限的声速传播。我们的论点是简单而普遍的,并表明,通过关注物理相关的观测值,人们通常可以期望一个有限的信息传播速度。这一论证同样适用于任意维度晶格上的量子自旋、玻色-哈伯德模型中的玻色子、费米子、任意子以及它们的一般混合物。它也适用于晶格上的耗散动力学,并推广到量子场的连续统。我们的结果可以看作是强关联模型的Lieb-Robinson界的一个有意义的模拟。

英文摘要:

We show that excitations of interacting quantum particles in lattice models always propagate with a finite speed of sound. Our argument is simple yet general and shows that by focusing on the physically relevant observables one can generally expect a bounded speed of information propagation. The argument applies equally to quantum spins, bosons such as in the Bose-Hubbard model, fermions, anyons, and general mixtures thereof, on arbitrary lattices of any dimension. It also pertains to dissipative dynamics on the lattice, and generalizes to the continuum for quantum fields. Our result can be seen as a meaningful analogue of the Lieb-Robinson bound for strongly correlated models.

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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