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Constructing Non-Hermitian Theories with Tunable Exceptional Points and Controlled State Purification
Soumya Kanti Pal, Rupak Majumder, Shamik Gupta
Exceptional points (EP's) are a hallmark of non-Hermitian quantum systems. We show that momentum-space deformation provides a general design principle for creating and controlling…
From Canonical to Tunable Phase Diagrams in Open Quantum Long-Range Systems
Anish Acharya, Shamik Gupta
We investigate the dissipative dynamics of a generalized Lipkin-Meshkov-Glick (LMG) model coupled to a thermal environment. In this generalized model, in addition to the convention…
Dynamics and steady states of tight-binding chains in presence of isolated defects
Anish Acharya, Luca Giuggioli, Shamik Gupta
Reduced transport and localization in isolated quantum systems are typically attributed to spatially-extended disorder, but may also emerge from the influence of a few controllable…
Causality, localization, and universality of monitored quantum walks with long-range hopping
Sayan Roy, Shamik Gupta, Giovanna Morigi
A powerful strategy to accelerate quantum-walk-based search algorithms leverages on resetting protocols, where a detector monitors a target site and the evolution of the walker is…
Coherence-decoherence interplay in quantum systems due to projective stochastic pulses: The case of Rabi oscillations
Sushanta Dattagupta, Shamik Gupta
The interplay of coherence and decoherence is played out in a three-level quantum system, in which the third level is incoherently coupled to the second one which itself is in cohe…