50 citations · 288 across the 19 of their papers we have counts for
20 papers
Temperature and integrability-breaking correspondence via adiabatic transformations
Hyeongjin Kim, Souvik Bandyopadhyay, Anatoli Polkovnikov
We reveal a correspondence between temperature and integrability-breaking in classical and quantum many-body systems through the lens of geometry and adiabatic transformations. Dec…
Probing quantum many-body dynamics using subsystem Loschmidt echos
Simon Karch, Souvik Bandyopadhyay, Zheng-Hang Sun +9
The Loschmidt echo - the probability of a quantum many-body system to return to its initial state following a dynamical evolution - generally contains key information about a quant…
Slow relaxation of quasi-periodically driven integrable quantum many-body systems
Souradeep Ghosh, Sourav Bhattacharjee, Souvik Bandyopadhyay
We study the emergence and stability of a prethermal phase in an integrable many-body system subjected to a Fibonacci drive. Despite not being periodic, Fibonacci drives have been…
Sharp detection of the onset of Floquet heating using eigenstate sensitivity
Sourav Bhattacharjee, Souvik Bandyopadhyay, Anatoli Polkovnikov
Chaotic Floquet systems at sufficiently low driving frequencies are known to heat up to an infinite temperature ensemble in the thermodynamic limit. However at high driving frequen…
Signatures of quantum phases in a dissipative system
Rohan Joshi, Saikat Mondal, Souvik Bandyopadhyay +2
Lindbladian formalism, as tuned to dissipative and open systems, has been all-pervasive to interpret non-equilibrium steady states of quantum many-body systems. We study the fate o…
Late-time critical behavior of local string-like observables under quantum quenches
Souvik Bandyopadhyay, Anatoli Polkovnikov, Amit Dutta
In recent times it has been observed that signatures of equilibrium quantum criticality surprisingly show up in many-body systems which are manifestly far from equilibrium. We expl…
Partons as unique ground states of quantum Hall parent Hamiltonians: The case of Fibonacci anyons
M. Tanhayi Ahari, S. Bandyopadhyay, Z. Nussinov +2
We present microscopic, multiple Landau level, (frustration-free and positive semi-definite) parent Hamiltonians whose ground states, realizing different quantum Hall fluids, are p…
Push-sum Distributed Dual Averaging for Convex Optimization in Multi-agent Systems with Communication Delays
Cong Wang, Shengyuan Xu, Deming Yuan +2
The distributed convex optimization problem over the multi-agent system is considered in this paper, and it is assumed that each agent possesses its own cost function and communica…
Detecting topological phase transitions through entanglement between disconnected partitions in a Kitaev chain with long-range interactions
Saikat Mondal, Souvik Bandyopadhyay, Sourav Bhattacharjee +1
We explore the behaviour of the disconnected entanglement entropy (DEE) across the topological phases of a long range interacting Kitaev chain where the long range interactions dec…
Quasi-localization dynamics in a Fibonacci quantum rotor
Sourav Bhattacharjee, Souvik Bandyopadhyay, Amit Dutta
We analyze the dynamics of a quantum kicked rotor (QKR) driven with a binary Fibonacci sequence of two distinct drive amplitudes. While the dynamics at low drive frequencies is fou…
Driven quantum many-body systems and out-of-equilibrium topology
Souvik Bandyopadhyay, Sourav Bhattacharjee, Diptiman Sen
In this review we present some of the work done in India in the area of driven and out-of-equilibrium systems with topological phases. After presenting some well-known examples of…
Bilayer Haldane system: Topological characterization and adiabatic passages connecting Chern phases
Sourav Bhattacharjee, Souvik Bandyopadhyay, Diptiman Sen +1
We present a complete topological characterization of a bilayer composite of two Chern insulators (specifically, Haldane models) and explicitly establish the bulk-boundary correspo…
Observing Dynamical Quantum Phase Transitions through Quasilocal String Operators
Souvik Bandyopadhyay, Anatoli Polkovnikov, Amit Dutta
We analyze signatures of the dynamical quantum phase transitions in physical observables. In particular, we show that both the expectation value and various out of time order corre…
Dissipative preparation of many-body Floquet Chern insulators
Souvik Bandyopadhyay, Amit Dutta
Considering coupling to a micro-structured bath as a relaxation mechanism in a periodically driven dissipative Haldane model, we establish that the system may be tuned to a strobos…
Unitary preparation of many body Chern insulators: Adiabatic bulk boundary correspondence
Souvik Bandyopadhyay, Amit Dutta
We approach the long-standing problem of preparing an out-of-equilibrium many-body Chern insulator (CI) and associated bulk-boundary correspondence unitarily. Herein, this is addre…
Growth of mutual information in a quenched one-dimensional open quantum many body system
Somnath Maity, Souvik Bandyopadhyay, Sourav Bhattacharjee +1
We study the temporal evolution of the mutual information (MI) in a one-dimensional Kitaev chain, coupled to a fermionic Markovian bath, subsequent to a global quench of the chemic…
Dynamical generation of Majorana edge correlations in a ramped Kitaev chain coupled to nonthermal dissipative channels
Souvik Bandyopadhyay, Sourav Bhattacharjee, Amit Dutta
We quantitatively study the out-of-equilibrium edge-Majorana correlation in a linearly ramped one-dimensional Kitaev chain of finite length in a dissipative environment. The chemic…
Dynamical preparation of a topological state and out of equilibrium bulk boundary correspondence in a SSH chain under periodic driving
Souvik Bandyopadhyay, Amit Dutta
Exploiting the possibility of temporal variation of the winding number, we have prepared a SSH chain in its {\it stroboscopic} topological state, starting from the trivial one, by…
Temporal variation in the winding number due to dynamical symmetry breaking and associated transport in a driven SSH chain
Souvik Bandyopadhyay, Utso Bhattacharya, Amit Dutta
Considering a BDI symmetric one-dimensional SSH model, we explore the fate of the bulk topological invariant, namely, the winding number under a generic time dependent perturbation…
Exploring the possibilities of dynamical quantum phase transitions in the presence of a Markovian bath
Souvik Bandyopadhyay, Sudarshana Laha, Utso Bhattacharya +1
We explore the possibility of dynamical quantum phase transitions (DQPTs) occurring during the temporal evolution of a quenched transverse field Ising chain coupled to a particle l…