From dual-unitary to quantum Bernoulli circuits: Role of the entangling power in constructing a quantum ergodic hierarchy

S Aravinda, SA Rather, A Lakshminarayan - Physical Review Research, 2021 - APS
Deterministic classical dynamical systems have an ergodic hierarchy, from ergodic through
mixing, to Bernoulli systems that are “as random as a coin toss.” Dual-unitary circuits have …

Scrambling in strongly chaotic weakly coupled bipartite systems: Universality beyond the Ehrenfest timescale

R Prakash, A Lakshminarayan - Physical Review B, 2020 - APS
Out-of-time-order correlators (OTOCs), vigorously being explored as a measure of quantum
chaos and information scrambling, is studied here in the natural and simplest multiparticle …

Dual unitaries as maximizers of the distance to local product gates

S Brahmachari, RN Rajmohan, SA Rather… - Physical Review A, 2024 - APS
The problem of finding the resource-free, closest local unitary, to any bipartite unitary gate U
is addressed. Previously discussed as a measure of nonlocality, the distance KD (U) to the …

Maximum coherence in the optimal basis

ML Hu, SQ Shen, H Fan - Physical Review A, 2017 - APS
The resource theoretic measure of quantum coherence is basis dependent, and the amount
of coherence contained in a state is different in different bases. We obtained analytical …

Coherifying quantum channels

K Korzekwa, S Czachórski, Z Puchała… - New Journal of …, 2018 - iopscience.iop.org
Is it always possible to explain random stochastic transitions between states of a finite-
dimensional system as arising from the deterministic quantum evolution of the system? If not …

Quantum coherence controls the nature of equilibration and thermalization in coupled chaotic systems

JJ Pulikkottil, A Lakshminarayan, SCL Srivastava… - Physical Review E, 2023 - APS
A bipartite system whose subsystems are fully quantum chaotic and coupled by a
perturbative interaction with a tunable strength is a paradigmatic model for investigating how …

Maximal coherence in a generic basis

Y Yao, GH Dong, L Ge, M Li, CP Sun - Physical Review A, 2016 - APS
Since quantum coherence is an undoubted characteristic trait of quantum physics, the
quantification and application of quantum coherence has been one of the long-standing …

Eigenstate entanglement between quantum chaotic subsystems: Universal transitions and power laws in the entanglement spectrum

S Tomsovic, A Lakshminarayan, SCL Srivastava… - Physical Review E, 2018 - APS
We derive universal entanglement entropy and Schmidt eigenvalue behaviors for the
eigenstates of two quantum chaotic systems coupled with a weak interaction. The …

Entanglement measures of bipartite quantum gates and their thermalization under arbitrary interaction strength

B Jonnadula, P Mandayam, K Życzkowski… - Physical Review …, 2020 - APS
Entanglement properties of bipartite unitary operators are studied via their local invariants,
namely the entangling power ep and a complementary quantity, the gate typicality gt. We …

Entanglement in a dephasing model and many-body localization

M Žnidarič - Physical Review B, 2018 - APS
We study entanglement dynamics in a diagonal dephasing model in which the strength of
interaction decays exponentially with distance—the so-called l-bit model of many-body …