6 papers
Rare-History Transitions in Temporally Random Integrable Quantum Circuits
Tingfei Li, Jie Gu
We study current fluctuations in a temporally random integrable quantum circuit. Commutativity reduces every drive history exactly to its layer composition, turning annealed fluctu…
Nonisospectral Integrability and Exact Current Fluctuations in the Two-Dimensional SSEP
Tingfei Li
We study annealed current fluctuations in the two-dimensional symmetric simple exclusion process (SSEP) across a circular passive counting boundary. The initial average density is…
Energy Transport in Randomly Coupled Quantum Systems: A Perturbative Approach
Tingfei Li, Runyu Chen
We study energy transport between two quantum systems coupled through a random interaction. The central feature of our approach is to model the coupling as a Gaussian random matrix…
Statistics of Matrix Elements of Operators in a Disorder-Free SYK model
Tingfei Li, Shuanghong Li
Recently, studies have explored the statistics of matrix elements of local operators in the Lieb-Liniger model. It was found that the probability distribution function for off-diag…
Higher-Order Corrections to Scrambling Dynamics in Brownian Spin SYK Models
Tingfei Li, Miao Wang, Jianghui Yu
We investigate operator growth in a Brownian spin Sachdev--Ye--Kitaev (SYK) model with random all-to-all interactions, focusing on the full operator-size distribution. For Hamilton…
Graph-Theoretic Analysis of -Replica Time Evolution in the Brownian Gaussian Unitary Ensemble
Tingfei Li, Jianghui Yu
In this paper, we investigate the -replica time evolution operator for the Brownian Gaussian Unitary Ensemble (BGUE) using a graph-t…