456 citations · 3.3k across the 66 of their papers we have counts for
17 papers · 1 filter
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…
Stark many-body localization on a superconducting quantum processor
Qiujiang Guo, Chen Cheng, Hekang Li +9
Quantum emulators, owing to their large degree of tunability and control, allow the observation of fine aspects of closed quantum many-body systems, as either the regime where ther…
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…
Scrambling Ability of Quantum Neural Networks Architectures
Yadong Wu, Pengfei Zhang, Hui Zhai
In this letter we propose a general principle for how to build up a quantum neural network with high learning efficiency. Our stratagem is based on the equivalence between extracti…
Floquet Engineering of a Dynamical Lattice Gauge Field with Ultracold Atoms
Wei Zheng, Pengfei Zhang
In this paper, we propose that a simple model, in which fermions coupled to a dynamical lattice gauge field, can be engineered via the Floquet approach. The model possess both a in…
Tunneling through an Eternal Traversable Wormhole
Tian-Gang Zhou, Pengfei Zhang
The Maldacena-Qi model describes two copies of the Sachdev-Ye-Kitaev model coupled with an additional coupling, and is dual to the Jackiw-Teitelboim gravity which exhibits an etern…
Disconnecting a Traversable Wormhole: Universal Quench Dynamics in Random Spin Models
Tian-Gang Zhou, Lei Pan, Yu Chen +2
Understanding strongly interacting quantum matter and quantum gravity are both important open issues in theoretical physics, and the holographic duality between quantum field theor…
Periodically and Quasi-periodically Driven Dynamics of Bose-Einstein Condensates
Pengfei Zhang, Yingfei Gu
We study the quantum dynamics of Bose-Einstein condensates when the scattering length is modulated periodically or quasi-periodically in time within the Bogoliubov framework. For t…
Observation of Two-Vertex Four-Dimensional Spin Foam Amplitudes with a 10-qubit Superconducting Quantum Processor
Pengfei Zhang, Zichang Huang, Chao Song +8
Quantum computers are an increasingly hopeful means for understanding large quantum many-body systems bearing high computational complexity. Such systems exhibit complex evolutions…
Universal relations for hybridized - and -wave interactions from spin-orbital coupling
Fang Qin, Pengfei Zhang
In this work, we study the universal relations for one-dimensional spin-orbital-coupled fermions near both - and -wave resonances using effective field theory. Since the spin…
Universal subdiffusion in strongly tilted many-body systems
Pengfei Zhang
The quantum dynamics away from equilibrium is of fundamental interest for interacting many-body systems. In this letter, we study tilted many-body systems using the effective Hamil…
Entanglement Entropy and its Quench Dynamics for Pure States of the Sachdev-Ye-Kitaev model
Pengfei Zhang
Sachdev-Ye-Kitaev (SYK) is a concrete solvable model with non-Fermi liquid behavior and maximal chaos. In this work, we study the entanglement Rényi entropy for the subsystems of t…
Replica wormhole and information retrieval in the SYK model coupled to Majorana chains
Yiming Chen, Xiao-Liang Qi, Pengfei Zhang
Motivated by recent studies of the information paradox in (1+1)-D anti-de Sitter spacetime with a bath described by a (1+1)-D conformal field theory, we study the dynamics of secon…
Large-momentun tail of one-dimensional Fermi gases with spin-orbit coupling
Fang Qin, Pengfei Zhang, Peng-Lu Zhao
We study the contacts, large-momentum tail, radio-frequency spectroscopy, and some other universal relations for an ultracold one-dimensional (1D) two-component Fermi gas with spin…
Many-Body Localization from Dynamical Gauge Fields
Zhiyuan Yao, Chang Liu, Pengfei Zhang +1
A recent experiment [Nature Physics 10, 1 (2019)] has realized a dynamical gauge system with gauge symmetry in a double-well potential. In this work we propose a met…
The Coupled SYK model at Finite Temperature
Xiao-Liang Qi, Pengfei Zhang
Sachdev-Ye-Kitaev (SYK) model, which describes randomly interacting Majorana fermions in 0+1 dimension, is found to be an solvable UV-complete toy model for holographic duality…
Size of bulk fermions in the SYK model
Yuri D. Lensky, Xiao-Liang Qi, Pengfei Zhang
The study of quantum gravity in the form of the holographic duality has uncovered and motivated the detailed investigation of various diagnostics of quantum chaos. One such measure…