118 citations · 402 across the 15 of their papers we have counts for
15 papers
Heisenberg-limited metrology with perturbing interactions
Chao Yin, Andrew Lucas
We show that it is possible to perform Heisenberg-limited metrology on GHZ-like states, in the presence of generic spatially local, possibly strong interactions during the measurem…
Polynomial-time classical sampling of high-temperature quantum Gibbs states
Chao Yin, Andrew Lucas
The computational complexity of simulating quantum many-body systems generally scales exponentially with the number of particles. This enormous computational cost prohibits first p…
Speed limits and locality in many-body quantum dynamics
Chi-Fang Chen, Andrew Lucas, Chao Yin
We review the mathematical speed limits on quantum information processing in many-body systems. After the proof of the Lieb-Robinson Theorem in 1972, the past two decades have seen…
Mixed-State Entanglement Measures in Topological Order
Chao Yin, Shang Liu
Quantum entanglement is a particularly useful characterization of topological orders which lack conventional order parameters. In this work, we study the entanglement in topologica…
Universal entanglement and correlation measure in two-dimensional conformal field theories
Chao Yin, Zhenhuan Liu
We calculate the amount of entanglement shared by two intervals in the ground state of a (1+1)-dimensional conformal field theory (CFT), quantified by an entanglement measure $\mat…
Information scrambling of the dilute Bose gas at low temperature
Chao Yin, Yu Chen
We calculate the quantum Lyapunov exponent and butterfly velocity in the dilute Bose gas at temperature deep in the Bose-Einstein condensation phase. The generalize…
Prethermalization and the local robustness of gapped systems
Chao Yin, Andrew Lucas
We prove that prethermalization is a generic property of gapped local many-body quantum systems, subjected to small perturbations, in any spatial dimension. More precisely, let $H_…
Locality and error correction in quantum dynamics with measurement
Aaron J. Friedman, Chao Yin, Yifan Hong +1
The speed of light sets a strict upper bound on the speed of information transfer in both classical and quantum systems. In nonrelativistic quantum systems, the Lieb-Robinson T…
Finite speed of quantum information in models of interacting bosons at finite density
Chao Yin, Andrew Lucas
We prove that quantum information propagates with a finite velocity in any model of interacting bosons whose (possibly time-dependent) Hamiltonian contains spatially local single-b…
Deep reinforcement learning for quantum Hamiltonian engineering
Pai Peng, Xiaoyang Huang, Chao Yin +3
Engineering desired Hamiltonian in quantum many-body systems is essential for applications such as quantum simulation, computation and sensing. Conventional quantum Hamiltonian eng…
Quantum operator growth bounds for kicked tops and semiclassical spin chains
Chao Yin, Andrew Lucas
We present a framework for understanding the dynamics of operator size, and bounding the growth of out-of-time-ordered correlators, in models of large- spins. Focusing on the dy…
Prethermal quasiconserved observables in Floquet quantum systems
Chao Yin, Pai Peng, Xiaoyang Huang +2
Prethermalization, by introducing emergent quasiconserved observables, plays a crucial role in protecting Floquet many-body phases over exponentially long time, while the ultimate…
Bound on quantum scrambling with all-to-all interactions
Chao Yin, Andrew Lucas
We prove bounds on operator growth and infinite temperature out-of-time-ordered correlators in many-body systems with spin- degrees of freedom which interact via t…
Observation of Floquet prethermalization in dipolar spin chains
Pai Peng, Chao Yin, Xiaoyang Huang +2
Periodically driven Floquet quantum systems provide a promising platform to investigate novel physics out of equilibrium. Unfortunately, the drive generically heats up the system t…
Wannier basis method for KAM effect in quantum mechanics
Chao Yin, Yu Chen, Biao Wu
The effect of Kolmogorov-Arnold-Moser (KAM) theorem in quantum systems is manifested in dividing eigenstates into regular and irregular states. We propose an effective method based…