55 citations · 207 across the 7 of their papers we have counts for
7 papers
Scrambling Transition in Free Fermion Systems Induced by a Single Impurity
Qucheng Gao, Tianci Zhou, Pengfei Zhang +1
In quantum many-body systems, interactions play a crucial role in the emergence of information scrambling. When particles interact throughout the system, the entanglement between t…
Information Scrambling in Free Fermion Systems with a Sole Interaction
Qucheng Gao, Pengfei Zhang, Xiao Chen
It is well established that the presence of single impurity can have a substantial impact on the transport properties of quantum many-body systems at low temperature. In this work,…
Quantum error as an emergent magnetic field
Shao-Kai Jian, Chunxiao Liu, Xiao Chen +2
We investigate the effect of quantum errors on a monitored Brownian Sachdev-Ye-Kitaev (SYK) model featuring a measurement-induced phase transition that can be understood as a symme…
Universal Entanglement Transitions of Free Fermions with Long-range Non-unitary Dynamics
Pengfei Zhang, Chunxiao Liu, Shao-Kai Jian +1
Non-unitary evolution can give rise to novel steady states classified by their entanglement properties. In this work, we aim to understand its interplay with long-range hopping tha…
Emergent Replica Conformal Symmetry in Non-Hermitian SYK Chains
Pengfei Zhang, Shao-Kai Jian, Chunxiao Liu +1
Recently, the steady states of non-unitary free fermion dynamics are found to exhibit novel critical phases with power-law squared correlations and a logarithmic subsystem entangle…
Non-unitary dynamics of Sachdev-Ye-Kitaev chain
Chunxiao Liu, Pengfei Zhang, Xiao Chen
We construct a series of one-dimensional non-unitary dynamics consisting of both unitary and imaginary evolutions based on the Sachdev-Ye-Kitaev model. Starting from a short-range…
Subsystem Rényi Entropy of Thermal Ensembles for SYK-like models
Pengfei Zhang, Chunxiao Liu, Xiao Chen
The Sachdev-Ye-Kitaev model is an -modes fermionic model with infinite range random interactions. In this work, we study the thermal Rényi entropy for a subsystem of the SYK mod…