Quantum scars of bosons with correlated hopping
Quantum scars of bosons with correlated hopping
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具有相关跳跃的玻色子的量子疤痕
DOI：
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发表时间：
2019
影响因子：
5.5
通讯作者：
Z. Papi'c
中科院分区：
文献类型：
--
作者：
Ana Hudomal;Ivana Vasi'c;N. Regnault;Z. Papi'c
最近在里德堡原子阵列上的实验发现了异常缓慢的热化和持续的密度振荡的证据，这被解释为量子疤痕现象的多体模拟。周期动力学和非典型的伤痕本征态起源于一个“硬”的动力学约束：相邻的里德堡原子不能同时被激发。在这里，我们提出了一种在一维玻色格子模型中实现量子多体疤痕的方法，该模型具有密度辅助跳跃形式的“软”约束。我们讨论了该模型与标准玻色-哈伯德模型的关系，以及利用超冷原子可能的实验实现。我们发现，该模型表现出与里德堡原子链相似的唯象，包括高能密度下的弱纠缠本征态和大量具有不同代数结构的精确零能态的存在。最近在里德堡原子阵列上的实验中观察到了量子多体疤痕，这是一种特殊的现象，系统在时间演化过程中发生热化，同时保持恢复到初始状态。利用依赖于密度跳跃的玻色子链，从理论上研究了三个哈密顿量的光谱性质，为多体量子疤痕现象提供了新的见解。
Recent experiments on Rydberg atom arrays have found evidence of anomalously slow thermalization and persistent density oscillations, which have been interpreted as a many-body analog of the phenomenon of quantum scars. Periodic dynamics and atypical scarred eigenstates originate from a “hard” kinetic constraint: the neighboring Rydberg atoms cannot be simultaneously excited. Here we propose a realization of quantum many-body scars in a 1D bosonic lattice model with a “soft” constraint in the form of density-assisted hopping. We discuss the relation of this model to the standard Bose-Hubbard model and possible experimental realizations using ultracold atoms. We find that this model exhibits similar phenomenology to the Rydberg atom chain, including weakly entangled eigenstates at high energy densities and the presence of a large number of exact zero energy states, with distinct algebraic structure. Quantum many-body scarring, a peculiar phenomenon whereby a system thermalizes whilst it keeps returning to its initial state during the time evolution, has recently been observed in experiments on arrays of Rydberg atoms. The authors theoretically investigate the spectral properties of three Hamiltonians using a chain of bosons with density-dependent hopping, providing new insight in the phenomenon of many-body quantum scarring.
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影响因子：
8.6
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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影响因子：
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作者：
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作者：
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通讯作者：
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