10 papers · 1 filter
Detection of Mpemba effect through good observables in open quantum systems
Pitambar Bagui, Arijit Chatterjee, Bijay Kumar Agarwalla
The Mpemba effect refers to the anomalous relaxation of a quantum state that, despite being initially farther from equilibrium, relaxes faster than a closer counterpart. Detecting…
Full counting statistics for boundary driven transport in presence of correlated gain and loss channels
Katha Ganguly, Bijay Kumar Agarwalla
One of the major advances of quantum technology is the engineering of complex quantum channels in lattice systems that paves the way for a variety of novel non-equilibrium phenomen…
Dynamics of number entropy for free fermionic systems in presence of defects and stochastic processes
Atharva Naik, Bijay Kumar Agarwalla, Manas Kulkarni
We investigate the dynamics of number entropy in a chain of free fermions subjected to both defects and stochastic processes. For a special class of defects, namely conformal defec…
Quantum dynamics in lattices in presence of bulk dephasing and a localized source
Tamoghna Ray, Katha Ganguly, Dario Poletti +2
The aim of this work is to study the dynamics of quantum systems subjected to a localized fermionic source in the presence of bulk dephasing. We consider two classes of one-dimensi…
Accelerated relaxation and Mpemba-like effect for operators in open quantum systems
Pitambar Bagui, Arijit Chatterjee, Bijay Kumar Agarwalla
Quantum Mpemba effect occurs when a quantum system, residing far away from the steady state, relaxes faster than a relatively nearer state. We look for the presence of this highly…
Emergence of distinct relaxation behaviour and Quantum Regression Theorem in the Ultra-strong Coupling Limit
Sakil Khan, Bijay Kumar Agarwalla
In the framework of open quantum systems, we derive the dynamical equation governing two-time correlation functions in the ultra-strong coupling (USC) regime between the system and…