212 citations · 1.5k across the 55 of their papers we have counts for
8 papers · 1 filter
Probability transport on the Fock space of a disordered quantum spin chain
Isabel Creed, David E. Logan, Sthitadhi Roy
Within the broad theme of understanding the dynamics of disordered quantum many-body systems, one of the simplest questions one can ask is: given an initial state, how does it evol…
Hilbert-space correlations beyond multifractality and bipartite entanglement in many-body localised systems
Sthitadhi Roy
Eigenstates of many-body localised (MBL) systems are characterised by area-law bipartite entanglement along with multifractal statistics of their amplitudes on Hilbert space. At th…
Constrained Dynamics and Directed Percolation
Aydin Deger, Achilleas Lazarides, Sthitadhi Roy
In a recent work [A. Deger et al., Phys. Rev. Lett. 129, 160601 (2022)] we have shown that kinetic constraints can completely arrest many-body chaos in the dynamics of a classical,…
Real-time correlators in chaotic quantum many-body systems
Adam Nahum, Sthitadhi Roy, Sagar Vijay +1
We study real-time local correlators in chaotic quantum many-body systems. These correlators show universal structure at l…
Scaling of Fock-space propagator and multifractality across the many-body localization transition
Jagannath Sutradhar, Soumi Ghosh, Sthitadhi Roy +3
We implement a recursive Green function method to extract the Fock space (FS) propagator and associated self-energy across the many-body localization (MBL) transition, for one-dime…
Arresting classical many-body chaos by kinetic constraints
Aydin Deger, Sthitadhi Roy, Achilleas Lazarides
We investigate the effect of kinetic constraints on classical many-body chaos in a translationally-invariant Heisenberg spin chain using a classical counterpart of the out-of-time-…
Resonant energy scales and local observables in the many-body localised phase
Samuel J. Garratt, Sthitadhi Roy
We formulate a theory for resonances in the many-body localised (MBL) phase of disordered quantum spin chains in terms of local observables. A key result is to show that there are…
Anomalous multifractality in quantum chains with strongly correlated disorder
Alexander Duthie, Sthitadhi Roy, David E. Logan
We demonstrate numerically that a robust and unusual multifractal regime can emerge in a one-dimensional quantum chain with maximally correlated disorder, above a threshold disorde…