A two-way approach to out-of-time-order correlators
A two-way approach to out-of-time-order correlators
复制标题
一种处理乱序相关器的双向方法
DOI:
10.1007/jhep03(2022)133
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发表时间:
2021
影响因子:
5.4
通讯作者:
Pengfei Zhang
中科院分区:
文献类型:
--
作者:
Yingfei Gu;A. Kitaev;Pengfei Zhang
Out-of-time-order correlators (OTOCs) are a standard measure of quantum chaos. Of the four operators involved, one pair may be regarded as a source and the other as a probe. A usual approach, applicable to large-N systems such as the SYK model, is to replace the actual source with some mean-field perturbation and solve for the probe correlation function on the double Keldysh contour. We show how to obtain the OTOC by combining two such solutions for perturbations propagating forward and backward in time. These dynamical perturbations, or scrambling modes, are considered on the thermofield double background and decomposed into a coherent and an incoherent part. For the large-q SYK, we obtain the OTOC in a closed form. We also prove a previously conjectured relation between the Lyapunov exponent and high-frequency behavior of the spectral function.
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影响因子:
5.4
作者:
Yiming Chen;X. Qi;Pengfei Zhang
通讯作者:
Yiming Chen;X. Qi;Pengfei Zhang
DOI:
--
发表时间:
2018-06
期刊:
arXiv: High Energy Physics - Theory
影响因子:
--
作者:
Phil Saad;S. Shenker;D. Stanford
通讯作者:
Phil Saad;S. Shenker;D. Stanford
影响因子:
5.4
作者:
Stanford, Douglas;Yang, Zhenbin;Yao, Shunyu
通讯作者:
Yao, Shunyu
影响因子:
5.4
作者:
Lensky, Yuri D.;Qi, Xiao-Liang;Zhang, Pengfei
通讯作者:
Zhang, Pengfei
影响因子:
3.7
作者:
Eberlein, Andreas;Kasper, Valentin;Steinberg, Julia
通讯作者:
Steinberg, Julia