Maximum Entropy Principle in Deep Thermalization and in Hilbert-Space Ergodicity

DK Mark, F Surace, A Elben, AL Shaw, J Choi… - Physical Review X, 2024 - APS
We report universal statistical properties displayed by ensembles of pure states that
naturally emerge in quantum many-body systems. Specifically, two classes of state …

Probing postmeasurement entanglement without postselection

SJ Garratt, E Altman - PRX Quantum, 2024 - APS
We study the problem of observing quantum collective phenomena emerging from large
numbers of measurements. These phenomena are difficult to observe in conventional …

Unified theory of local quantum many-body dynamics: Eigenoperator thermalization theorems

B Buča - Physical Review X, 2023 - APS
Explaining quantum many-body dynamics is a long-held goal of physics. A rigorous operator
algebraic theory of dynamics in locally interacting systems in any dimension is provided …

Hilbert-space ergodicity in driven quantum systems: Obstructions and designs

S Pilatowsky-Cameo, I Marvian, S Choi, WW Ho - Physical Review X, 2024 - APS
Despite its long history, a canonical formulation of quantum ergodicity that applies to general
classes of quantum dynamics, including driven systems, has not been fully established …

Quantum Information Spreading in Generalized Dual-Unitary Circuits

A Foligno, P Kos, B Bertini - Physical Review Letters, 2024 - APS
We study the spreading of quantum information in a recently introduced family of brickwork
quantum circuits that generalizes the dual-unitary class. These circuits are unitary in time …

Solvable model of deep thermalization with distinct design times

M Ippoliti, WW Ho - Quantum, 2022 - quantum-journal.org
We study the emergence over time of a universal, uniform distribution of quantum states
supported on a finite subsystem, induced by projectively measuring the rest of the system …

Complete Hilbert-space ergodicity in quantum dynamics of generalized Fibonacci drives

S Pilatowsky-Cameo, CB Dag, WW Ho, S Choi - Physical Review Letters, 2023 - APS
Ergodicity of quantum dynamics is often defined through statistical properties of energy
eigenstates, as exemplified by Berry's conjecture in single-particle quantum chaos and the …

Hierarchical generalization of dual unitarity

XH Yu, Z Wang, P Kos - Quantum, 2024 - quantum-journal.org
Quantum dynamics with local interactions in lattice models display rich physics, but is
notoriously hard to study. Dual-unitary circuits allow for exact answers to interesting physical …

From dual unitarity to generic quantum operator spreading

MA Rampp, R Moessner, PW Claeys - Physical Review Letters, 2023 - APS
Dual-unitary circuits are paradigmatic examples of exactly solvable yet chaotic quantum
many-body systems, but solvability naturally goes along with a degree of nongeneric …

Exact thermal eigenstates of nonintegrable spin chains at infinite temperature

Y Chiba, Y Yoneta - Physical Review Letters, 2024 - APS
The eigenstate thermalization hypothesis (ETH) plays a major role in explaining
thermalization of isolated quantum many-body systems. However, there has been no proof …