38 citations · 38 across the 3 of their papers we have counts for
8 papers · 1 filter
Jaynes-Cummings dynamics in strong coupling for many-interacting-qubit quantum Rabi models
Roberto Grimaudo, Sagnik Chakraborty, Rosario Lo Franco +1
The present work focuses on the strong/weak interaction of many-body spin-systems with a cavity mode. It introduces the necessity of redefining the physical conditions determining…
Efficient Estimation of Multiple Temperatures via a Collisional Model
Srijon Ghosh, Sagnik Chakraborty, Rosario Lo Franco
We present a quantum thermometric protocol for the estimation of multiple temperatures within the collisional model framework. Employing the formalism of multiparameter quantum met…
Intrinsic Hamiltonian of Mean Force and Strong-Coupling Quantum Thermodynamics
Ignacio González, Sagnik Chakraborty, Ángel Rivas
We present a universal thermodynamic framework for quantum systems that may be strongly coupled to thermal environments. Unlike previous approaches, our method enables a clear defi…
Thermodynamics and the quantum speed limit in the non-Markovian regime
Arpan Das, Anindita Bera, Sagnik Chakraborty +1
Quantum speed limit (QSL) for open quantum systems in the non-Markovian regime is analyzed. We provide a the lower bound for the time required to transform an initial state to a fi…
On the Alberti-Uhlmann Condition for Unital Channels
Sagnik Chakraborty, Dariusz Chruściński, Gniewomir Sarbicki +1
We address the problem of existence of completely positive trace preserving (CPTP) maps between two sets of density matrices. We refine the result of Alberti and Uhlmann and derive…
Information flow versus divisibility for qubit evolution
Sagnik Chakraborty, Dariusz Chruściński
We study the relation between lack of Information Backflow and completely positive divisibility (CP divisibility) for non-invertible qubit dynamical maps. Recently, these two conce…