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arXiv 2003.00034cond-mat.quant-gascond-mat.stat-mechphysics.atom-phquant-ph
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动力学约束Rydberg自旋系统的振动修饰

Vibrational dressing in Kinetically Constrained Rydberg Spin Systems

Paolo P. Mazza, Richard Schmidt, Igor Lesanovsky

摘要:

具有动力学约束的量子自旋系统已成为探索多体系统集体动力学行为的典范。在这里,我们讨论了一个便利的自旋系统,它的灵感来自最近的进展,在实现里德伯量子模拟器。该平台允许控制和调查促进动力学和自旋自由度与晶格振动的耦合之间的相互作用。发展一个极小模型,我们表明,这将导致形成极化准粒子激发,形成的多体自旋态打扮的声子。我们详细地研究了这些准粒子的性质,如它们的色散关系、有效质量和准粒子重量。里德伯晶格量子模拟器特别适合于研究这种声子装扮的动力学约束动力学,因为它们夸张的长度尺度允许对自旋和声子自由度进行现场分辨监测。

英文摘要:

Quantum spin systems with kinetic constraints have become paradigmatic for exploring collective dynamical behaviour in many-body systems. Here we discuss a facilitated spin system which is inspired by recent progress in the realization of Rydberg quantum simulators. This platform allows to control and investigate the interplay between facilitation dynamics and the coupling of spin degrees of freedom to lattice vibrations. Developing a minimal model, we show that this leads to the formation of polaronic quasiparticle excitations which are formed by many-body spin states dressed by phonons. We investigate in detail the properties of these quasiparticles, such as their dispersion relation, effective mass and the quasiparticle weight. Rydberg lattice quantum simulators are particularly suited for studying this phonon-dressed kinetically constrained dynamics as their exaggerated length scales permit the site-resolved monitoring of spin and phonon degrees of freedom.

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