Subroto Mukerjee
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View article: Quantum chaos in PT symmetric quantum systems
Quantum chaos in PT symmetric quantum systems Open
In this study, we explore the interplay between \mathcal{PT} -symmetry and quantum chaos in a non-Hermitian dynamical system. We consider an extension of the standard diagnostics of quantum chaos, namely the complex level spacing ratio…
View article: Many-body critical phase in a quasiperiodic chain and dynamical Widom lines in Fock-space properties
Many-body critical phase in a quasiperiodic chain and dynamical Widom lines in Fock-space properties Open
We study a quasiperiodic model in one dimension, namely the extended Aubry-André-Harper (EAAH) chain, that realizes a critical phase comprising entirely single-particle critical states in the non-interacting limit. In the presence of short…
View article: Intraparticle entanglement in noisy quantum channels: degradation and revival through amplitude damping
Intraparticle entanglement in noisy quantum channels: degradation and revival through amplitude damping Open
Quantum correlations between two or more different degrees of freedom of the same particle are sometimes referred to as intraparticle entanglement. In this work, we study these intraparticle correlations between two different degrees of fr…
View article: Many-body critical phase in a quasiperiodic chain and dynamical Widom lines in Fock space properties
Many-body critical phase in a quasiperiodic chain and dynamical Widom lines in Fock space properties Open
We study a quasiperiodic model in one dimension, namely the extended Aubry-André-Harper (EAAH) chain, that realizes a critical phase comprising entirely single-particle critical states in the non-interacting limit. In the presence of short…
View article: Universality in quantum critical flow of charge and heat in ultra-clean graphene
Universality in quantum critical flow of charge and heat in ultra-clean graphene Open
Close to the Dirac point, graphene is expected to exist in quantum critical Dirac fluid state, where the flow of both charge and heat can be described with a dc electrical conductivity $σ_\mathrm{Q}$, and thermodynamic variables such as th…
View article: Persistent currents in mesoscopic spin-orbit coupled rings due to an applied Zeeman field
Persistent currents in mesoscopic spin-orbit coupled rings due to an applied Zeeman field Open
Persistent currents (PCs) in mesoscopic rings have been a subject of intense investigation since their proposal by Büttiker, Landauer, and Imry in 1983 Phys. Lett. A 96, 365 (1983)0375-960110.1016/0375-9601(83)90011-7.. In this paper, we …
View article: Persistent currents in mesoscopic spin-orbit coupled rings due to an applied Zeeman field
Persistent currents in mesoscopic spin-orbit coupled rings due to an applied Zeeman field Open
Persistent currents (PCs) in mesoscopic rings have been a subject of intense investigation since their proposal by Büttiker, Landauer, and Imry in 1983. In this paper, we explore the behavior of PC in spin-orbit coupled rings under the inf…
View article: Thermopower probing emergent local moments in magic-angle twisted bilayer graphene
Thermopower probing emergent local moments in magic-angle twisted bilayer graphene Open
Recent experiments on magic-angle twisted bilayer graphene (MATBLG) indicate an unusual coexistence of heavy 1-6 and light 7-10 fermions. Yet, these experiments lack direct evidence of the existence of local moments arising from the flatba…
View article: Thermopower probing emergent local moments in magic-angle twisted bilayer graphene
Thermopower probing emergent local moments in magic-angle twisted bilayer graphene Open
Recent experiments on magic-angle twisted bilayer graphene (MATBLG) have revealed the formation of flatbands, suggesting that correlation effects are likely to dominate in this system. Yet, a global transport measurement showing distinct s…
View article: Quantum chaos in PT symmetric quantum systems
Quantum chaos in PT symmetric quantum systems Open
In this study, we explore the interplay between $\mathcal{PT}$-symmetry and quantum chaos in a non-Hermitian dynamical system. We consider an extension of the standard diagnostics of quantum chaos, namely the complex level spacing ratio an…
View article: Scaling of Fock space propagator in quasiperiodic many-body localizing systems
Scaling of Fock space propagator in quasiperiodic many-body localizing systems Open
Recently many body localized systems have been treated as a hopping problem on a Fock space lattice with correlated disorder, where the many-body eigenstates exhibit multi-fractal character. The many-body propagator in Fock space has been …
View article: Emergent hydrodynamics in a non-reciprocal classical isotropic magnet
Emergent hydrodynamics in a non-reciprocal classical isotropic magnet Open
The Hamiltonian nature of the precessional dynamics of the classical Heisenberg model leads to reciprocal interactions amongst the spins. Heisenberg spins are reciprocal in nature. In this work, we study the dynamics of a nonequilibrium cl…
View article: Vortical currents and reciprocal relations for transport coefficients in the electron hydrodynamic regime
Vortical currents and reciprocal relations for transport coefficients in the electron hydrodynamic regime Open
We investigate the hydrodynamic regime in metals with momentum-conserving electron-electron scattering. The conservation of momentum results in well-defined dynamics whose effects we investigate via the relevant continuity equations. We fi…
View article: Energy magnetization and transport in systems with a non-zero Berry curvature in a magnetic field
Energy magnetization and transport in systems with a non-zero Berry curvature in a magnetic field Open
We demonstrate that the well-known expression for the charge magnetization of a sample with a non-zero Berry curvature can be obtained by demanding that the Einstein relation holds for the electric transport current. We extend this formali…
View article: Generation of intraparticle quantum correlations in amplitude damping channel and its robustness
Generation of intraparticle quantum correlations in amplitude damping channel and its robustness Open
Quantum correlations between two or more different degrees of freedom of the same particle is sometimes referred to as intraparticle entanglement. In this work, we study these intra-particle correlations between two different degrees of fr…
View article: Quantum phases of dipolar bosons in a multilayer optical lattice
Quantum phases of dipolar bosons in a multilayer optical lattice Open
We consider a minimal model to investigate the quantum phases of hardcore, polarized dipolar atoms confined in multilayer optical lattices. The model is a variant of the extended Bose-Hubbard model, which incorporates intralayer repulsion …
View article: Report on scipost_202204_00041v2
Report on scipost_202204_00041v2 Open
We demonstrate that the well-known expression for the charge magnetization of a sample with a non-zero Berry curvature can be obtained by demanding that the Einstein relation holds for the electric transport current.We extend this formalis…
View article: Dephasing and Decorrelation of Spins in a Disordered Environment
Dephasing and Decorrelation of Spins in a Disordered Environment Open
Dephasing of spins is a major roadblock to scaling up the size of quantum computing systems. We explore the possibility of utilizing highly disordered environments which are in the Many-Body Localized phase to arrest this dephasing. We emb…
View article: Scaling of the Fock-space propagator and multifractality across the many-body localization transition
Scaling of the Fock-space propagator and multifractality across the many-body localization transition Open
We implement a recursive Green's function method to extract the Fock space (FS) propagator and associated self-energy across the many-body localization (MBL) transition, for one-dimensional interacting fermions in a random on-site potentia…
View article: Report on scipost_202204_00041v1
Report on scipost_202204_00041v1 Open
We demonstrate that the well-known expression for the charge magnetization of a sample with a non-zero Berry curvature can be obtained by demanding that the Einstein relation holds for the electric transport current.We extend this formalis…
View article: Report on scipost_202204_00041v1
Report on scipost_202204_00041v1 Open
We demonstrate that the well-known expression for the charge magnetization of a sample with a non-zero Berry curvature can be obtained by demanding that the Einstein relation holds for the electric transport current.We extend this formalis…
View article: Energy magnetization and transport in systems with a non-zero Berry curvature in a magnetic field
Energy magnetization and transport in systems with a non-zero Berry curvature in a magnetic field Open
We demonstrate that the well-known expression for the charge magnetization of a sample with a non-zero Berry curvature can be obtained by demanding that the Einstein relation holds for the electric transport current. We extend this formali…
View article: Quantized conductance with nonzero shot noise as a signature of Andreev edge state
Quantized conductance with nonzero shot noise as a signature of Andreev edge state Open
Electrical conductance measurements have a limited scope in identifying Andreev edge states (AESs), which form the basis for realizing various topological excitations in quantum Hall (QH)-superconductor (SC) junctions. To unambiguously det…
View article: Quantum phases of dipolar bosons in multilayer optical lattice
Quantum phases of dipolar bosons in multilayer optical lattice Open
We consider a minimal model to investigate the quantum phases of hardcore, polarized dipolar atoms confined in multilayer optical lattices. The model is a variant of the extended Bose-Hubbard model, which incorporates intralayer repulsion …
View article: Renormalization group study of systems with quadratic band touching
Renormalization group study of systems with quadratic band touching Open
The perturbative effects of interactions in two two-dimensional systems with a single quadratic band touching point have been studied at a transition point. The effects of interactions have been studied using the renormalization group (RG)…