456 citations · 3.3k across the 66 of their papers we have counts for
25 papers · 1 filter
Quantum phases of -orbital bosonic gases in a hexagonal lattice
Pengfei Zhang, Hui Tan, Jianmin Yuan +1
Orbital degree of freedom plays an important role for understanding quantum many-body phenomena. In this work, we study an experimentally related setup with ultracold bosons loaded…
Attenuating Dynamics of Strongly Interacting Fermionic Superfluids in SYK Solvable Models
Tian-Gang Zhou, Pengfei Zhang
Quench dynamics of fermionic superfluids are an active topic both experimentally and theoretically. Using the BCS theory, such non-equilibrium problems can be reduced to nearly ind…
Quantized Topological Response in Trapped Quantum Gases
Pengfei Zhang
In this letter, we propose a quantized topological response in trapped 1D quantum gases. The experimental protocol for the response requires the application of an instant optical p…
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…
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…
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…
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…
Realizing the Hayden-Preskill Protocol with Coupled Dicke Models
Yanting Cheng, Chang liu, Jinkang Guo +3
Hayden and Preskill proposed a thought experiment that Bob can recover the information Alice throws into a black hole if he has a quantum computer entangled with the black hole, an…
Many-Body Echo
Yang-Yang Chen, Pengfei Zhang, Wei Zheng +2
In this letter we propose a protocol to reverse a quantum many-body dynamical process. We name it "many-body echo" because the underlying physics is closely related to the spin ech…
On the Equivalence between Spin and Charge Dynamics of the Fermi Hubbard Model
Hui Zhai, Ning Sun, Jinlong Yu +1
Utilizing the Fermi gas microscope, recently the MIT group has measured the spin transport of the Fermi Hubbard model starting from a spin-density-wave state, and the Princeton gro…
Resonant Driving induced Ferromagnetism in the Fermi Hubbard Model
Ning Sun, Pengfei Zhang, Hui Zhai
In this letter we consider quantum phases and the phase diagram of a Fermi Hubbard model under periodic driving that has been realized in recent cold atom experiments, in particula…
Three-Body Problem of Bosons nearby a d-wave Resonance
Juan Yao, Pengfei Zhang, Ran Qi +1
Motivated by recent experimental progresses, we investigate few-body properties of interacting spinless bosons nearby a d-wave resonance. Using the Skorniakov-Ter-Martirosion (STM)…
Quantum Chaos for the Unitary Fermi Gas from the Generalized Boltzmann Equations
Pengfei Zhang
In this paper, we study the chaotic behavior of the unitary Fermi gas in both high and low temperature limits by calculating the Quantum Lyapunov exponent defined in terms of the o…
Energy absorption spectroscopy of unitary Fermi gases in a uniform potential
Pengfei Zhang, Zhenhua Yu
We propose to use the energy absorption spectroscopy to measure the kinetic coefficients of unitary Fermi gases in a uniform potential. We show that in our scheme, the energy absor…
Universal relations for spin-orbit coupled Fermi gas near an s-wave resonance
Pengfei Zhang, Ning Sun
The synthetic spin-orbit coupled quantum gases is widely studied both experimentally and theoretically in recent years. As previous studies show, this modification of single-body d…
Universal three-body bound states in mixed dimensions beyond the Efimov paradigm
Pengfei Zhang, Zhenhua Yu
The Efimov effect was first predicted for three particles interacting at an -wave resonance in three dimensions. Subsequent study showed that the same effect can be realized by…
Curvature Induced Topological Defects of -wave Superfluid on a Sphere
Ruihua Fan, Pengfei Zhang, Zhe-Yu Shi
We study the ground state of spinless fermions living on a sphere across -wave Feschbach resonances. By construsting a microscopic model of fermions on a general curved surface,…
Sigature of the universal super Efimov Effect: three-body contact in two dimensional Fermi gases
Pengfei Zhang, Zhenhua Yu
A new class of universal "three-body" bound states has been recently predicted theoretically for identical fermions interacting at p-wave resonance in two dimensions. This phenomen…
Measuring Topological Number of a Chern-Insulator from Quench Dynamics
Ce Wang, Pengfei Zhang, Xin Chen +2
In this letter we show how the topological number of a static Hamiltonian can be measured from a dynamical quench process. We focus on a two-band Chern insulator in two-dimension,…
Out-of-Time-Order Correlation at a Quantum Phase Transition
Huitao Shen, Pengfei Zhang, Ruihua Fan +1
In this paper we numerically calculate the out-of-time-order correlation functions in the one-dimensional Bose-Hubbard model. Our study is motivated by the conjecture that a system…
Out-of-Time-Order Correlation for Many-Body Localization
Ruihua Fan, Pengfei Zhang, Huitao Shen +1
In this paper we first compute the out-of-time-order correlators (OTOC) for both a phenomenological model and a random-field XXZ model in the many-body localized phase. We show tha…