7 citations · 14 across the 16 of their papers we have counts for
18 papers
Cooperative Domain-Wall Dynamics in a Two-Dimensional Quasiclassical Holstein Model
Arunangshu Bora, Sankha Subhra Bakshi, Ho Jang +1
We investigate charge-density-wave (CDW) coarsening in a two-dimensional quasiclassical Holstein model following thermal quenches into the ordered phase. Although the staggered CDW…
Exact Equivariance from Ordinary Neural Networks for Lattice Many-Body Dynamics
Ho Jang, Sankha Subhra Bakshi, Gia-Wei Chern
Large-scale simulations of correlated electron systems require repeated evaluations of the electronic forces and transition energies driving collective dynamics. Machine-learning s…
Spatial instability of a homogeneous superconductor after an interaction quench
Medha Roy Choudhury, Sankha Subhra Bakshi, Pinaki Majumdar +1
We investigate the quantum dynamics of a conventional superconductor, described by the attrac- tive Hubbard model, driven far from equilibrium by quenching the Hubbard attraction.…
Nonequilibrium Broken-Symmetry States from Retained Observables
Sankha Subhra Bakshi, Gia-Wei Chern
In equilibrium, broken-symmetry states are selected by the competition between energy and entropy. Out of equilibrium, slowly relaxing observables retain information about the prep…
The Interplay of Thermal Melting and Pump Driven Melting of Charge Order: A Two-Temperature Study of the Holstein Model
Debraj Bose, Sankha Subhra Bakshi, Pinaki Majumdar
Charge order driven by electron-phonon coupling is well understood at equilibrium but pump-probe experiments raise a new question: how does this order melt and recover after strong…
Exotic Spin Excitation Continuum in a Weakly Coupled Quantum Chainsaw Antiferromagnet
Asiri Thennakoon, Prena Chaudhary, Sankha Subhra Bakshi +9
Collective motions in strongly interacting magnets involve many spins and are often described in terms of integer-spin excitations. However, in certain cases, the collective motion…
Schwinger-Boson Mean-Field Study of the Anisotropic Kagome Antiferromagnet
Sankha Subhra Bakshi, Brandon B. Le, Seung-Hun Lee +1
We investigate the effect of spatial exchange anisotropy on the spin- kagome antiferromagnet using Schwinger-boson mean-field theory. The anisotropy is introduced by strengthe…
Machine Learning Modeling of Charge-Density-Wave Recovery After Laser Melting
Sankha Subhra Bakshi, Yunhao Fan, Gia-Wei Chern
We investigate the nonequilibrium dynamics of a laser-pumped two-dimensional spinless Holstein model within a semiclassical framework, focusing on the melting and recovery of long-…
Emergent Spatial Textures from Interaction Quenches in the Hubbard Model
Sankha Subhra Bakshi, Gia-Wei Chern
Interaction quenches in strongly correlated electron systems provide a powerful route to probe nonequilibrium many-body dynamics. For the Hubbard model, nonequilibrium dynamical me…
Pseudospin Formulation of Quench Dynamics in the Semiclassical Holstein Model
Lingyu Yang, Ho Jang, Sankha Subhra Bakshi +2
We present a pseudospin formulation for the post-quench dynamics of charge-density-wave (CDW) order in the half-filled spinless Holstein model on a square lattice, assuming spatial…
Nonequilibrium DC Current Generation in a Driven Dissipative Haldane Model
Konrad Koenigsmann, Sankha Subhra Bakshi, Peter Schauss +1
The interplay of topology with nonequilibrium driving and dissipation in open quantum systems has recently attracted significant interest in condensed matter physics. In this work,…
Photo-Induced Enhancement of Critical Temperature in a Phase Competing Spin-Fermion System
Sankha Subhra Bakshi
Ultrafast optical excitation is known to destabilize long-range order in correlated systems, yet experiments have also reported the emergence of metastable phases, in some cases wi…
Dynamics in the nonequilibrium energy landscape of a frustrated Mott insulator
Sankha Subhra Bakshi, Tanmoy Mondal, Pinaki Majumdar
In a Mott insulator, a laser pulse with frequency tuned to the gap scale can create a holon-doublon plasma, suppressing the magnetic moment and destroying magnetic ord…
Enormous enhancement of resistivity in nanostructured electron-phonon systems
Debraj Bose, Sankha Subhra Bakshi, Pinaki Majumdar
Recent experiments on nanoclusters of silver (Ag) embedded in a gold (Au) matrix reveal a huge increase in both the zero temperature resistivity and the coefficient of the `` li…
Distinct charge and spin recovery dynamics in a photo-excited Mott insulator
Sankha Subhra Bakshi, Pinaki Majumdar
Pump-probe response of the spin-orbit coupled Mott insulator SrIrO reveals a rapid creation of low energy optical weight and suppression of three dimensional magnetic order…
Nonequilibrium dynamics of suppression, revival, and loss of charge order in a laser pumped electron-phonon system
Sankha Subhra Bakshi, Debraj Bose, Arijit Dutta +1
An electron-phonon system at commensurate filling often displays charge order (CO) in the ground state. Such a system subject to a laser pulse shows a wide variety of behaviour. A…
Strongly anharmonic collective modes in a coupled electron-phonon-spin problem
Sauri Bhattacharyya, Sankha Subhra Bakshi, Saurabh Pradhan +1
We solve for the finite temperature collective mode dynamics in the Holstein-double exchange problem, using coupled Langevin equations for the phonon and spin variables. We present…
A Langevin approach to lattice dynamics in a charge ordered polaronic system
Sauri Bhattacharyya, Sankha Subhra Bakshi, Samrat Kadge +1
We use a Langevin approach to treat the finite temperature dynamics of displacement variables in the half-filled spinless Holstein model. Working in the adiabatic regime we exploit…