29 citations · 91 across the 15 of their papers we have counts for
16 papers
Optimal Disorder Strength for Approximate Unitary -Designs in Spin Chains
Tian-Gang Zhou, Yi-Neng Zhou, Thierry Giamarchi +1
Quantum simulators with disordered spin Hamiltonians offer a natural route to Haar-like unitary ensembles, but face a competition. Disorder enhances randomness, yet strong disorder…
Three Hamiltonians are Sufficient for Unitary -Design in Temporal Ensemble
Yi-Neng Zhou, Tian-Gang Zhou, Julian Sonner
Unitary -designs are central to quantum information and quantum many-body physics, as they provide efficient proxies for Haar-random dynamics. We study how chaotic Hamiltonian e…
Universal Predictors for Mixing Time more than Liouvillian Gap
Yi-Neng Zhou
We analyze the mixing time of open quantum systems governed by the Lindblad master equation, showing that it is determined not only by the Liouvillian gap, but also by the trace-no…
Realizing Unitary -designs with a Single Quench
Yi-Neng Zhou, Robin Löwenberg, Julian Sonner
We present a single-quench protocol that generates unitary -designs with minimal control. A system first evolves under a random Hamiltonian ; at a switch time $t_s \geq t_{…
Measuring Rényi entropy with an Echo Protocol
Yi-Neng Zhou, Robin Löwenberg, Julian Sonner
We present efficient and practical protocols to measure the second Rényi entropy, whose exponential is known as the purity. Our approach is based on expressing the purity in terms…
Generalized Loschmidt echo and information scrambling in open systems
Yi-Neng Zhou, Chang Liu
Quantum information scrambling, typically explored in closed quantum systems, describes the spread of initially localized information throughout a system and can be quantified by m…
Validity of the Lieb-Schultz-Mattis Theorem in Long-Range Interacting Systems
Yi-Neng Zhou, Xingyu Li
The Lieb-Schultz-Mattis (LSM) theorem asserts that microscopic details of the system can impose non-trivial constraints on the system's low-energy properties. While traditionally a…
Distinguishing Quantum Phases through Cusps in Full Counting Statistics
Chang-Yan Wang, Tian-Gang Zhou, Yi-Neng Zhou +1
Measuring physical observables requires averaging experimental outcomes over numerous identical measurements. The complete distribution function of possible outcomes or its Fourier…
Numerical investigations of the extensive entanglement Hamiltonian in quantum spin ladders
Chengshu Li, Xingyu Li, Yi-Neng Zhou
Entanglement constitutes one of the key concepts in quantum mechanics and serves as an indispensable tool in the understanding of quantum many-body systems. In this work, we perfor…
Reviving the Lieb-Schultz-Mattis Theorem in Open Quantum Systems
Yi-Neng Zhou, Xingyu Li, Hui Zhai +2
In closed systems, the celebrated Lieb-Schultz-Mattis (LSM) theorem states that a one-dimensional locally interacting half-integer spin chain with translation and spin rotation sym…
Universal Properties of the Spectral Form Factor in Open Quantum Systems
Yi-Neng Zhou, Tian-Gang Zhou, Pengfei Zhang
The spectral form factor (SFF) can probe the eigenvalue statistic at different energy scales as its time variable varies. In closed quantum chaotic systems, the SFF exhibits a univ…
Full Counting Statistics across the Entanglement Phase Transition of Non-Hermitian Hamiltonians with Charge Conservations
Tian-Gang Zhou, Yi-Neng Zhou, Pengfei Zhang
Performing quantum measurements produces not only the expectation value of a physical observable but also the probability distribution of all possible outcomes . The…
Generalized Lindblad Master Equation for Measurement-Induced Phase Transition
Yi-Neng Zhou
The measurement-induced phase transition (MIPT) occurs when the system is evolving under unitary evolution together with local measurements followed by post-selection. We propose a…
Space-Time Duality between Quantum Chaos and Non-Hermitian Boundary Effect
Tian-Gang Zhou, Yi-Neng Zhou, Pengfei Zhang +1
Quantum chaos in hermitian systems concerns the sensitivity of long-time dynamical evolution to initial conditions. The skin effect discovered recently in non-hermitian systems rev…
Renyi Entropy Dynamics and Lindblad Spectrum for Open Quantum System
Yi-Neng Zhou, Liang Mao, Hui Zhai
In this letter we point out that the Lindblad spectrum of a quantum many-body system displays a segment structure and exhibits two different energy scales in the strong dissipation…
Towards quantum simulation of Sachdev-Ye-Kitaev model
Ye Cao, Yi-Neng Zhou, Ting-Ting Shi +1
We study a simplified version of the Sachdev-Ye-Kitaev (SYK) model with real interactions by exact diagonalization. Instead of satisfying a continuous Gaussian distribution, the in…