18 papers
Finite-Bath Open Quantum Systems: Exact Dynamics
Devvrat Tiwari, Subhashish Banerjee
In this work, we introduce a method for deriving exact master equations from the dynamical map for finite open quantum systems coupled to (in)finite reservoirs, using the principle…
Symmetric Two-Level Open Quantum Systems: Information Theoretic Facets
Baibhab Bose, Devvrat Tiwari, Subhashish Banerjee
The theory of a two-level -Hermitian Hamiltonian with symmetry is reviewed and extended to include open system dynamics. A first-principles derivation of the gen…
Collective Quantum Batteries and Charger-Battery Setup in Open Quantum Systems: Impact of Inter-Qubit Interactions, Dissipation, and Quantum Criticality
Mahima Yadav, Devvrat Tiwari, Subhashish Banerjee
Quantum batteries have emerged as promising platforms for exploring energy storage and transfer processes governed by quantum mechanical laws. In this work, we study three models o…
Two-Qubit Spin-Boson Model in the Strong Coupling Regime: Coherence, Non-Markovianity, and Quantum Thermodynamics
Hasan Mehdi Rizvi, Devvrat Tiwari, Subhashish Banerjee
We investigate the dynamics of a two-qubit open quantum system, in particular the two-qubit spin-boson model in the strong coupling regime, coupled to two thermal bosonic baths und…
Interferometric and Bipartite OTOC for Non-Markovian Open Quantum Spin-Chains and Lipkin-Meshkov-Glick Model
Baibhab Bose, Devvrat Tiwari, Subhashish Banerjee
The information scrambling phenomena in an open quantum system modeled by Ising spin chains coupled to Lipkin-Meshkov-Glick (LMG) baths are observed via an interferometric method f…
Thermodynamics of an Open Symmetric Quantum System
Baibhab Bose, Devvrat Tiwari, Subhashish Banerjee
For a subclass of a general symmetric Hamiltonian obeying anti-commutation relation with its conjugate, a Hermitian basis is found that spans the bi-orthonormal ener…