261 citations · 601 across the 22 of their papers we have counts for
22 papers
Floquet engineering of competing antiferromagnetism and -wave superconductivity on the square lattice
Zhaoyu Han, Subir Sachdev
We propose a driven Lieb--Hubbard quantum simulator whose prethermal dynamics realize a square-lattice spin-1/2 fermion model with independently tunable repulsive on-site and attra…
Quantum spin liquid from electron-phonon coupling
Xun Cai, Zhaoyu Han, Zi-Xiang Li +2
A quantum spin liquid (QSL) is an exotic insulating phase with emergent gauge fields and fractionalized excitations. However, the unambiguous demonstration of the existence of a QS…
Models of interacting bosons with exact ground states: a unified approach
Zhaoyu Han, Steven A. Kivelson
We define an infinite class of ``frustration-free'' interacting lattice quantum Hamiltonians for bosons, constructed such that their exact ground states have a density distribution…
Emergent Gauge Fields in Band Insulators
Zhaoyu Han, Steven Kivelson
By explicit microscopic construction involving a mapping to a quantum vertex model subject to the `ice rule,' we show that an electronically `trivial' band insulator with suitable…
Pair-density-wave phase of strongly interacting electrons on the triangular lattice: A variational Monte Carlo study
Jiucai Wang, Wen Sun, Hao-Xin Wang +3
A robust theory of the mechanism of pair density wave (PDW) superconductivity (i.e. where Cooper pairs have nonzero center of mass momentum) remains elusive. Here we explore the tr…
Anomalous Landau level gaps near magnetic transitions in monolayer WSe
Benjamin A. Foutty, Vladimir Calvera, Zhaoyu Han +7
First-order phase transitions produce abrupt changes to the character of both ground and excited electronic states. Here we conduct electronic compressibility measurements to map t…
"Quantum Geometric Nesting" and Solvable Model Flat-Band Systems
Zhaoyu Han, Jonah Herzog-Arbeitman, B. Andrei Bernevig +1
We introduce the concept of "quantum geometric nesting'' (QGN) to characterize the idealized ordering tendencies of certain flat-band systems implicit in the geometric structure of…
"Quantum bipolaron" superconductivity from quadratic electron-phonon coupling
Zhaoyu Han, Steven A. Kivelson, Pavel A. Volkov
When the electron-phonon coupling is quadratic in the phonon coordinates, electrons can pair to form bipolarons due to phonon zero-point fluctuations, a purely quantum effect. We s…
Semi-classical theory of bipolaronic superconductivity in a bond-modulated electron-phonon model
Kyung-Su Kim, Zhaoyu Han, John Sous
We analyze the transition temperature of bipolaronic superconductivity in a bond Su-Schrieffer-Heeger (bond-SSH) model -- also known as a bond Peierls model -- where the elec…
Two-fluid theory of composite bosons and fermions and the quantum Hall proximity effect
Zhaoyu Han, Kyung-Su Kim, Steven A. Kivelson +1
We propose a two-fluid description of fractional quantum Hall systems, in which one component is a condensate of composite bosons and the other a Fermi liquid formed by composite f…
Resonating Valence Bond States in an Electron-Phonon System
Zhaoyu Han, Steven A. Kivelson
We study a simple electron-phonon model on square and triangular versions of the Lieb-lattice using an asymptotically exact strong coupling analysis. At zero temperature and electr…
The one-dimensional Holstein model revisited
Sijia Zhao, Zhaoyu Han, Ilya Esterlis +1
We analyze the global ground-state (quantum) phase diagram of the one-dimensional Holstein model at half-filling as a function of the strength of the electron-phonon coupling (repr…
Fractional Hall Conductivity and Spin-c Structure in Solvable Lattice Hamiltonians
Zhaoyu Han, Jing-Yuan Chen
The Kapustin-Fidkowski no-go theorem forbids symmetric topological orders with non-trivial Hall conductivity in (2+1)d from admitting commuting projector Hamiltonians, where…
Pair density wave and reentrant superconducting tendencies originating from valley polarization
Zhaoyu Han, Steven A. Kivelson
We investigate superconducting pairing tendencies of a two-dimensional electron fluid with both valley and spin degrees of freedom, both without and in the presence of an in-plane…
Correlated Hofstadter Spectrum and Flavor Phase Diagram in Magic Angle Graphene
Jiachen Yu, Benjamin A. Foutty, Zhaoyu Han +8
In magic angle twisted bilayer graphene (MATBG), the moiré superlattice potential gives rise to narrow electronic bands1 which support a multitude of many-body quantum phases. Furt…
Solvable Lattice Hamiltonians with Fractional Hall Conductivity
Zhaoyu Han, Jing-Yuan Chen
We construct a class of lattice Hamiltonians that exhibit fractional Hall conductivity. These Hamiltonians, while not being exactly solvable, can be controllably solved in their lo…
Pair-Density-Wave in the Strong Coupling Limit of the Holstein-Hubbard model
Kevin S. Huang, Zhaoyu Han, Steven A. Kivelson +1
A pair-density-wave (PDW) is a novel superconducting state with an oscillating order parameter. A microscopic mechanism that can give rise to it has been long sought but has not ye…
Strong Coupling Limit of the Holstein-Hubbard Model
Zhaoyu Han, Steven A. Kivelson, Hong Yao
We analyze the quantum phase diagram of the Holstein-Hubbard model using an asymptotically exact strong-coupling expansion. We find all sorts of interesting phases including a pair…
Charge Density Waves in a Quantum Plasma
Zhaoyu Han, Shiwei Zhang, Xi Dai
We analyze the instability of an unpolarized uniform quantum plasma consisting of two oppositely charged fermionic components with varying mass ratios, against charge and spin dens…
Scalable Quantum Tomography with Fidelity Estimation
Jun Wang, Zhao-Yu Han, Song-Bo Wang +4
We propose a quantum tomography scheme for pure qudit systems which adopts random base measurements and generative learning methods, along with a built-in fidelity estimation appro…
Unsupervised Generative Modeling Using Matrix Product States
Zhao-Yu Han, Jun Wang, Heng Fan +2
Generative modeling, which learns joint probability distribution from data and generates samples according to it, is an important task in machine learning and artificial intelligen…
Investigating disordered many-body system with entanglement in momentum space
Bing-Tian Ye, Zhao-Yu Han, Liang-Zhu Mu +1
We study the entanglement in momentum space of the ground state of a disordered one-dimensional fermion lattice model with attractive interaction. We observe two components in the…