Critically Slow Operator Dynamics in Constrained Many-Body Systems.
Critically Slow Operator Dynamics in Constrained Many-Body Systems.
复制标题
受限多体系统中的操作员动态极其缓慢。
DOI:
10.1103/physrevlett.127.235301
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发表时间:
2021
影响因子:
8.6
通讯作者:
M. Knap
中科院分区:
文献类型:
--
作者:
J. Feldmeier;M. Knap
The far-from-equilibrium dynamics of generic interacting quantum systems is characterized by a handful of universal guiding principles, among them the ballistic spreading of initially local operators. Here, we show that in certain constrained many-body systems the structure of conservation laws can cause a drastic modification of this universal behavior. As an example, we study operator growth characterized by out-of-time-order correlations (OTOCs) in a dipole-conserving fracton chain. We identify a critical point with sub-ballistically moving OTOC front, that separates a ballistic from a dynamically frozen phase. This critical point is tied to an underlying localization transition and we use its associated scaling properties to derive an effective description of the moving operator front via a biased random walk with long waiting times. We support our arguments numerically using classically simulable automaton circuits.
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影响因子:
3.7
作者:
Gopalakrishnan, Sarang
通讯作者:
Gopalakrishnan, Sarang
影响因子:
6.7
作者:
Gopalakrishnan, Sarang;Zakirov, Bahti
通讯作者:
Zakirov, Bahti
影响因子:
12.5
作者:
Nahum, Adam;Vijay, Sagar;Haah, Jeongwan
通讯作者:
Haah, Jeongwan
DOI:
10.48550/arxiv.1803.00089
发表时间:
2018
期刊:
arXiv e-prints
影响因子:
--
作者:
Jonay Cheryne
通讯作者:
Jonay Cheryne