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Exchange Fluctuation Theorems for Non-Markovian Baths in Quantum Collisional Model
Sayan Mondal, Sukrut Mondkar, Ujjwal Sen
The quantum exchange fluctuation theorem relates the probabilities of observing heat transfer along and against the temperature gradient between thermal baths at different temperat…
Bounds on Entanglement Dynamics from Krylov-Space Spreading
Swati Choudhary, Sukrut Mondkar, Ujjwal Sen
A recently developed notion, known as spread complexity, captures how a quantum state spreads in Krylov space under unitary evolution. Related Krylov-space approaches are increasin…
Dynamical Quantum Phase Transitions in Boundary Time Crystals
Sukrut Mondkar, Priya Ghosh, Ujjwal Sen
We demonstrate the existence of a dynamical quantum phase transition (DQPT) in a dissipative collective-spin model that exhibits the boundary time crystal (BTC) phase. We initializ…
Resource-resolved quantum fluctuation theorems in end-point measurement scheme
Sukrut Mondkar, Sayan Mondal, Ujjwal Sen
Fluctuation theorems provide universal constraints on nonequilibrium energy and entropy fluctuations, making them a natural framework to assess how and to what extent quantum resou…
Quantum refrigerator embedded in spin-star environments: Scalings of temperature and refrigeration time
Sukrut Mondkar, Aparajita Bhattacharyya, Ujjwal Sen
We examine a quantum absorption refrigerator that comprises three qubits, each of which is connected with a separate spin-star environment, with the three qubit-bath units coupled…