6 papers · 1 filter
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…
(Thermo-)dynamics of the spin-boson model in the weak coupling regime: Application as a quantum battery
Mahima Yadav, Devvrat Tiwari, Subhashish Banerjee
We investigate the spin-boson model's dynamical and thermodynamic features in the weak coupling regime using the weak coupling spin-boson (WCSB) and phase covariant (PC) master equ…
Quantum Chaos in Non-Markovian Open Quantum Systems: Interferometric OTOC, Loschmidt Echo and Commutator Operator Norm
Baibhab Bose, Devvrat Tiwari, Subhashish Banerjee
Out-of-time order correlators (OTOCs) are crucial tools for studying quantum chaos as they show distinct scrambling behavior for chaotic Hamiltonians. We calculate OTOC and analyze…
Increasing quantum speed limit via non-uniform magnetic field
Srishty Aggarwal, Banibrata Mukhopadhyay, Subhashish Banerjee +2
Quantum speed limit (QSL) defines the theoretical upper bound on how fast a quantum system can evolve between states. It imposes a fundamental constraint on the rate of quantum inf…
Quantum Thermal Analogs of Electric Circuits: A Universal Approach
Devvrat Tiwari, Samyadeb Bhattacharya, Subhashish Banerjee
In this work, we develop a panoramic schematic of quantum thermal analogs of electric circuits in the steady state regime. We establish the foundations of said premise by defining…