5 papers
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…
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…
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…
Logarithmic entanglement lightcone from eigenstate correlations in the many-body localised phase
Ratul Thakur, Bikram Pain, Sthitadhi Roy
We investigate the operator entanglement of the time-evolution operator through the framework of eigenstate correlations. Focusing on strongly disordered quantum many-body systems…
Entanglement dynamics and eigenstate correlations in strongly disordered quantum many-body systems
Bikram Pain, Sthitadhi Roy
The many-body localised phase of quantum systems is an unusual dynamical phase wherein the system fails to thermalise and yet, entanglement grows unboundedly albeit very slowly in…