154 citations · 1.5k across the 34 of their papers we have counts for
35 papers
Speculative Sampling in Interactive Video Generation
Yubo Huang, Yuxuan Zhang, Jiaming Liu +2
Interactive video generation commonly relies on small bidirectional chunks to reduce response latency. Yet our preliminary experiments show that larger chunks improve video quality…
Artificial Intelligence for Science in Quantum, Atomistic, and Continuum Systems
Xuan Zhang, Limei Wang, Jacob Helwig +60
Advances in artificial intelligence (AI) are fueling a new paradigm of discoveries in natural sciences. Today, AI has started to advance natural sciences by improving, accelerating…
A Score-Based Model for Learning Neural Wavefunctions
Xuan Zhang, Shenglong Xu, Shuiwang Ji
Quantum Monte Carlo coupled with neural network wavefunctions has shown success in computing ground states of quantum many-body systems. Existing optimization approaches compute th…
Noise Induced Universal Diffusive Transport in Fermionic Chains
Christopher M. Langlett, Shenglong Xu
We develop a microscopic transport theory in a randomly driven fermionic model with and without linear potential. The operator dynamics arise from the competition between noisy and…
Charge transport, information scrambling and quantum operator-coherence in a many-body system with U(1) symmetry
Lakshya Agarwal, Subhayan Sahu, Shenglong Xu
In this work, we derive an exact hydrodynamical description for the coupled, charge and operator dynamics, in a quantum many-body system with U(1) symmetry. Using an emergent symme…
Extracting Quantum Many-Body Scarred Eigenstates with Matrix Product States
Shun-Yao Zhang, Dong Yuan, Thomas Iadecola +2
Quantum many-body scarred systems host nonthermal excited eigenstates immersed in a sea of thermal ones. In cases where exact expressions for these special eigenstates are not know…
Quantum Many-Body Scars from Einstein-Podolsky-Rosen States in Bilayer Systems
Julia Wildeboer, Christopher M. Langlett, Zhi-Cheng Yang +3
Quantum many-body scar states are special eigenstates of nonintegrable models with distinctive entanglement features that give rise to infinitely long-lived coherent dynamics under…
Orbital-Active Dirac Materials from the Symmetry Principle
Shenglong Xu, Congjun Wu
Dirac materials, starting with graphene, have drawn tremendous research interest in the past decade. Instead of focusing on the orbital as in graphene, we move a step further…
Hydrodynamic theory of scrambling in chaotic long-range interacting systems
Tianci Zhou, Andrew Y. Guo, Shenglong Xu +2
The Fisher-Kolmogorov-Petrovsky-Piskunov (FKPP) equation provides a mean-field theory of out-of-time-ordered commutators in locally interacting quantum chaotic systems at high ener…
Lattice Convolutional Networks for Learning Ground States of Quantum Many-Body Systems
Cong Fu, Xuan Zhang, Huixin Zhang +3
Deep learning methods have been shown to be effective in representing ground-state wave functions of quantum many-body systems. Existing methods use convolutional neural networks (…
Long-Range Bell States from Local Measurements and Many-Body Teleportation without Time-Reversal
Lakshya Agarwal, Christopher M. Langlett, Shenglong Xu
In this work, we study quantum many-body teleportation, where a single qubit is teleported through a strongly-interacting quantum system, as a result of a scrambling unitary and lo…
Nonsymmorphic bosonization in one-dimensional generalized Kitaev spin-1/2 models
Wang Yang, Chao Xu, Shenglong Xu +2
In this work, we perform a detailed study on the consequences of nonsymmorphic symmetries in the Luttinger phase of the one-dimensional spin-1/2 Kitaev-Heisenberg-Gamma model with…
Scrambling Dynamics and Out-of-Time Ordered Correlators in Quantum Many-Body Systems: a Tutorial
Shenglong Xu, Brian Swingle
This tutorial article introduces the physics of quantum information scrambling in quantum many-body systems. The goals are to understand how to precisely quantify the spreading of…
Spin Accumulation and Longitudinal Spin Diffusion of Magnets
Wayne M. Saslow, Chen Sun, Shenglong Xu
We extend to the longitudinal component of the magnetization the spintronics idea that a magnet near equilibrium can be described by two magnetic variables. One is the usual magnet…
Emergent Symmetry in Brownian SYK Models and Charge Dependent Scrambling
Lakshya Agarwal, Shenglong Xu
In this work, we introduce a symmetry-based approach to study the scrambling and operator dynamics of Brownian SYK models at large finite and in the infinite limit. We comp…
Rainbow Scars: From Area to Volume Law
Christopher M. Langlett, Zhi-Cheng Yang, Julia Wildeboer +3
Quantum many-body scars (QMBS) constitute a new quantum dynamical regime in which rare "scarred" eigenstates mediate weak ergodicity breaking. One open question is to understand th…
Hilbert Space Fragmentation and Exact Scars of Generalized Fredkin Spin Chains
Christopher M. Langlett, Shenglong Xu
In this work, based on the Fredkin spin chain, we introduce a family of spin- many-body Hamiltonians with a three-site interaction featuring a fragmented Hilbert space with co…
A Sparse Model of Quantum Holography
Shenglong Xu, Leonard Susskind, Yuan Su +1
We study a sparse version of the Sachdev-Ye-Kitaev (SYK) model defined on random hypergraphs constructed either by a random pruning procedure or by randomly sampling regular hyperg…
The Speed of Quantum Information Spreading in Chaotic Systems
Josiah Couch, Stefan Eccles, Phuc Nguyen +2
We present a general theory of quantum information propagation in chaotic quantum many-body systems. The generic expectation in such systems is that quantum information does not pr…
Quantum Many-Body Scars and Space-Time Crystalline Order from Magnon Condensation
Thomas Iadecola, Michael Schecter, Shenglong Xu
We study the eigenstate properties of a nonintegrable spin chain that was recently realized experimentally in a Rydberg-atom quantum simulator. In the experiment, long-lived cohere…
Butterfly effect in interacting Aubry-Andre model: thermalization, slow scrambling, and many-body localization
Shenglong Xu, Xiao Li, Yi-Ting Hsu +2
The many-body localization transition in quasiperiodic systems has been extensively studied in recent ultracold atom experiments. At intermediate quasiperiodic potential strength,…
Scrambling dynamics across a thermalization-localization quantum phase transition
Subhayan Sahu, Shenglong Xu, Brian Swingle
We study quantum information scrambling, specifically the growth of Heisenberg operators, in large disordered spin chains using matrix product operator dynamics to scan across the…
Locality, Quantum Fluctuations, and Scrambling
Shenglong Xu, Brian Swingle
Thermalization of chaotic quantum many-body systems under unitary time evolution is related to the growth in complexity of initially simple Heisenberg operators. Operator growth is…
Accessing scrambling using matrix product operators
Shenglong Xu, Brian Swingle
Scrambling, a process in which quantum information spreads over a complex quantum system becoming inaccessible to simple probes, happens in generic chaotic quantum many-body system…