26 citations · 117 across the 16 of their papers we have counts for
16 papers
Identifying mobility edge from finite temperature spectral form factor
Basudha Roy, Anandamohan Ghosh, Adway Kumar Das
The spectral form factor (SFF) is a measure of energy correlations and has been widely used to identify the transition from the ergodic to the localized phase in interacting many-b…
Signatures of Nonergodicity in Sparse Random Matrices
Sagnik Seth, Adway Kumar Das, Anandamohan Ghosh
The prevalence of sparsity in the Fock space graph of interacting many-body systems motivates an investigation into the spectral statistics of sparse random matrices with on-site d…
Ground state and persistent oscillations in the quantum East model
Adway Kumar Das, Achilleas Lazarides
For the 1D quantum East model with open boundaries, we show that in the limit , the ground state is accurately captured by a simple spin-coherent product state. We f…
Anomalous energy correlations and spectral form factor in the nonergodic phase of the -ensemble
Basudha Roy, Adway Kumar Das, Anandamohan Ghosh +1
The -ensemble is a prototypical model of a single particle system on a one-dimensional disordered lattice with inhomogeneous nearest neighbor hopping. Corresponding nonergodic p…
Spectral statistics, non-equilibrium dynamics and thermalization in random matrices with global -symmetry
Adway Kumar Das
symmetry is ubiquitous in quantum mechanics where it drives various phase transitions and emergent physics. The role of symmetry in the thermalization…
Proposal for many-body quantum chaos detection with single-site measurements
Isaías Vallejo-Fabila, Adway Kumar Das, Sayan Choudhury +1
We demonstrate that the long-time dynamics of an observable associated with a single lattice site is sufficient to determine whether a many-body quantum system exhibits level stati…
Spectral form factor and energy correlations in banded random matrices
Adway Kumar Das, Anandamohan Ghosh, Lea F. Santos
Banded random matrices were introduced as a more realistic alternative to full random matrices for describing the spectral statistics of heavy nuclei. Initially considered by Wigne…
Emergent multifractality in power-law decaying eigenstates
Adway Kumar Das, Anandamohan Ghosh, Ivan M. Khaymovich
Eigenstate multifractality is of significant interest with potential applications in various fields of quantum physics. Most of the previous studies concentrated on fine-tuned quan…
Reducing dynamical fluctuations and enforcing self-averaging by opening many-body quantum systems
Isaias Vallejo-Fabila, Adway Kumar-Das, David A. Zarate-Herrada +3
We investigate how the dynamical fluctuations of many-body quantum systems out of equilibrium can be mitigated when they are opened to a dephasing environment. We consider the surv…
Proposal for many-body quantum chaos detection
Adway Kumar Das, Cameron Cianci, Delmar G. A. Cabral +8
In this work, the term ``quantum chaos'' refers to spectral correlations similar to those found in the random matrix theory. Quantum chaos can be diagnosed through the analysis of…
Robust non-ergodicity of ground state in the ensemble
Adway Kumar Das, Anandamohan Ghosh, Ivan M. Khaymovich
In various chaotic quantum many-body systems, the ground states show non-trivial athermal behavior despite the bulk states exhibiting thermalization. Such athermal states play a cr…
Absence of Mobility Edge in Short-range Uncorrelated Disordered Model: Coexistence of Localized and Extended States
Adway Kumar Das, Anandamohan Ghosh, Ivan M. Khaymovich
Unlike the well-known Mott's argument that extended and localized states should not coexist at the same energy in a generic random potential, we provide an example of a nearest-nei…
Transport in deformed centrosymmetric networks
Adway Kumar Das, Anandamohan Ghosh
Centrosymmetry often mediates Perfect State Transfer (PST) in various complex systems ranging from quantum wires to photosynthetic networks. We introduce the Deformed Centrosymmetr…
Chaos due to symmetry-breaking in deformed Poisson ensemble
Adway Kumar Das, Anandamohan Ghosh
The competition between strength and correlation of coupling terms in a Hamiltonian defines numerous phenomenological models exhibiting spectral properties interpolating between th…
Non-ergodic extended states in -ensemble
Adway Kumar Das, Anandamohan Ghosh
Matrix models showing chaotic-integrable transition in the spectral statistics are important for understanding Many Body Localization (MBL) in physical systems. One such example is…
Dynamical Signatures of Chaos to Integrability Crossover in Generalized Random Matrix Ensembles
Adway Kumar Das, Anandamohan Ghosh
We introduce a two-parameter ensemble of generalized real symmetric random matrices called the -Rosenzweig-Porter ensemble (\brpe), parameterized by , a fictitiou…