2 citations · 5 across the 12 of their papers we have counts for
12 papers
Dynamics of local quantum information in random unitary circuits
Ratul Thakur, Sthitadhi Roy
The physics of information scrambling in quantum many-body systems is intimately related to thermalisation and emergence of chaos. However, its standard characterisation through bi…
Quantum Chaos and Diffusive Transport from Geometric Randomness
Bibek Saha, Abhishek Dhar, Sthitadhi Roy
The physics of quantum chaos and diffusive transport is typically studied in settings with microscopic disorder or many-body interactions. In this Letter, we demonstrate that these…
Locality of deep thermalisation through the lens of entanglement teleportation
Saptarshi Mandal, Alan Sherry, Sthitadhi Roy
Deep thermalisation characterises the emergence of universal quantum state ensembles on subsystems due to projective measurements on their complement. We study the notion of locali…
Robust Correlation-Induced Localization Under Time-Reversal Symmetry Breaking
Bikram Pain, Sthitadhi Roy, Jens H. Bardarson +1
We study Anderson localization in a one-dimensional disordered system with long-range correlated hopping decaying as with complex hopping amplitudes that break time-rever…
The damage spreading transition: a hierarchy of renormalization group fixed points
Adam Nahum, Sthitadhi Roy
Deterministic classical cellular automata can be in two phases, depending on how irreversible the dynamical rules are. In the strongly irreversible phase, trajectories with differe…
Krylov-space anatomy and spread complexity of a disordered quantum spin chain
Bikram Pain, David E. Logan, Sthitadhi Roy
We investigate the anatomy and complexity of quantum states in Krylov space, in the ergodic and many-body localised (MBL) phases of a disordered, interacting spin chain. The Krylov…
Arrested Relaxation in a Disorder-Free Coulomb Spin Liquid
Souvik Kundu, Arnab Seth, Sthitadhi Roy +2
We investigate Coulomb spin liquids in classical spin-3/2 ice and show that the enlarged on-site Hilbert space gives rise to a qualitatively new class of such phases. Beyond the co…
Anderson localisation in spatially structured random graphs
Bibek Saha, Sthitadhi Roy
We study Anderson localisation on high-dimensional graphs with spatial structure induced by long-ranged but distance-dependent hopping. To this end, we introduce a class of models…
Information phases of partial projected ensembles generated from random quantum states and scrambling dynamics
Alan Sherry, Saptarshi Mandal, Sthitadhi Roy
The projected ensemble -- an ensemble of pure states on a subsystem conditioned on projective measurement outcomes on its complement -- provides a finer probe of ergodicity and inf…
Partial projected ensembles and spatiotemporal structure of information scrambling
Saptarshi Mandal, Pieter W. Claeys, Sthitadhi Roy
Thermalisation and information scrambling in out-of-equilibrium quantum many-body systems are deeply intertwined: local subsystems dynamically approach thermal density matrices whi…
Imprints of information scrambling on eigenstates of a quantum chaotic system
Bikram Pain, Ratul Thakur, Sthitadhi Roy
How are the spatial and temporal patterns of information scrambling in locally interacting quantum many-body systems imprinted on the eigenstates of the system's time-evolution ope…
Do mixed states exhibit deep thermalisation?
Alan Sherry, Sthitadhi Roy
Deep thermalisation -- where ensembles of pure states on a local subsystem, conditioned on measurement outcomes on its complement, approach universal maximum-entropy ensembles -- r…