Operator spreading in the memory matrix formalism
Operator spreading in the memory matrix formalism
复制标题
内存矩阵形式中的算子扩展
DOI:
10.1088/1751-8121/ac7091
复制
发表时间:
2022
期刊:
影响因子:
--
通讯作者:
McCulloch E
中科院分区:
文献类型:
--
作者:
McCulloch E
The spread and scrambling of quantum information is a topic of considerable current interest. Numerous studies suggest that quantum information evolves according to hydrodynamical equations of motion, even though it is a starkly different quantity to better-known hydrodynamical variables such as charge and energy. In this work we show that the well-known memory matrix formalism for traditional hydrodynamics can be applied, with relatively little modification, to the question of operator growth in many-body quantum systems. On a conceptual level, this shores up the connection between information scrambling and hydrodynamics. At a practical level, it provides a framework for calculating quantities related to operator growth like the butterfly velocity and front diffusion constant, and for understanding how these quantities are constrained by microscopic symmetries. We apply this formalism to calculate operator-hydrodynamical coefficients perturbatively in a family of Floquet models. Our formalism allows us to identify the processes affecting information transport that arise from the spatiotemporal symmetries of the model.
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影响因子:
12.5
作者:
Khemani, Vedika;Vishwanath, Ashvin;Huse, David A.
通讯作者:
Huse, David A.
影响因子:
3.7
作者:
Gopalakrishnan, Sarang;Huse, David A.;Vasseur, Romain
通讯作者:
Vasseur, Romain
影响因子:
3.7
作者:
Gopalakrishnan, Sarang
通讯作者:
Gopalakrishnan, Sarang
DOI:
10.1103/physrevx.10.031066
发表时间:
2019-12
期刊:
arXiv: Strongly Correlated Electrons
影响因子:
--
作者:
Tianci Zhou;A. Nahum
通讯作者:
Tianci Zhou;A. Nahum
影响因子:
12.5
作者:
Nahum, Adam;Vijay, Sagar;Haah, Jeongwan
通讯作者:
Haah, Jeongwan