92 citations · 504 across the 12 of their papers we have counts for
37 papers
Quantum Entanglement in the Sachdev-Ye-Kitaev Model and its Generalizations
Pengfei Zhang
Entanglement is one of the most important concepts in quantum physics. We review recent progress in understanding the quantum entanglement in many-body systems using large- solv…
Boundary Condition Independence of Non-Hermitian Hamiltonian Dynamics
Liang Mao, Tianshu Deng, Pengfei Zhang
Non-Hermitian skin effect, namely that the eigenvalues and eigenstates of a non-Hermitian tight-binding Hamiltonian have significant differences under open or periodic boundary con…
Page Curve from Non-Markovianity
Kaixiang Su, Pengfei Zhang, Hui Zhai
In this letter, we use the exactly solvable Sachdev-Ye-Kitaev model to address the issue of entropy dynamics when an interacting quantum system is coupled to a non-Markovian enviro…
Expressivity of Quantum Neural Networks
Yadong Wu, Juan Yao, Pengfei Zhang +1
In this work, we address the question whether a sufficiently deep quantum neural network can approximate a target function as accurate as possible. We start with simple but typical…
An obstacle to sub-AdS holography for SYK-like models
Pengfei Zhang, Yingfei Gu, Alexei Kitaev
We argue that "stringy" effects in a putative gravity-dual picture for SYK-like models are related to the branching time, a kinetic coefficient defined in terms of the retarded ker…
More on Complex Sachdev-Ye-Kitaev Eternal Wormholes
Pengfei Zhang
In this work, we study a generalization of the coupled Sachdev-Ye-Kitaev (SYK) model with charge conservations. The model contains two copies of the complex SYK model at dif…