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quant-ph2026

Non-Markovian renormalization of optomechanical exceptional points

Aritra Ghosh, M. Bhattacharya

The paper studies how memory effects from a non‑Markovian mechanical environment shift the location of exceptional points in driven optomechanical systems and alter observable sign…

quant-ph2026

Modeling the non-Markovian Brownian motion of an optomechanical resonator

Aritra Ghosh, Malay Bandyopadhyay, M. Bhattacharya

We propose a representative, globally-admissible phenomenological spectral density of the bath for the non-Markovian Brownian motion of an optomechanical resonator, motivated by th…

quant-ph2025

Cavity Optomechanical Quantum Memory for Twisted Photons Using a Ring BEC

Nilamoni Daloi, Rahul Gupta, Aritra Ghosh +3

We theoretically propose a photonic orbital angular momentum (OAM) quantum memory platform based on an atomic Bose-Einstein condensate confined in a ring trap and placed inside a F…

quant-ph2024

Sensing atomic superfluid rotation beyond the standard quantum limit

Rahul Gupta, Pardeep Kumar, Rina Kanamoto +2

Atomic superfluids formed using Bose-Einstein condensates (BECs) in a ring trap are currently being investigated in the context of superfluid hydrodynamics, quantum sensing and mat…

quant-ph2024

Hybrid Rotational Cavity Optomechanics Using Atomic Superfluid in a Ring

Sanket Das, Pardeep Kumar, M. Bhattacharya +1

We introduce a hybrid optomechanical system containing an annularly trapped Bose-Einstein condensate (BEC) inside an optical cavity driven by Lauguerre-Gaussian (LG) modes. Spiral…