17 papers
Can Spontaneous Time-Translation Symmetry Breaking Be Quantized Without Explicit Branches?
Partha Nandi
Can classically branched dynamics associated with spontaneous time-translation-symmetry breaking be quantized without explicitly retaining the branches of the Hamiltonian? We inves…
From Analytic Structure to Quantum Complexity: Walsh-Pauli Representations of Continuum Operators
Raphael De Sousa, Partha Nandi, Francesco Petruccione
How does continuum operator structure appear in a finite qubit register? We address this question for analytic functions of diagonal operators represented in a binary basis, focusi…
Revealing the Quantum Signature of Gravity via Gravitational Waves
Partha Nandi
Can propagating gravitational waves serve as operational probes of the quantum nature of gravity? We address this question by developing a unified theoretical framework that combin…
Spin-Induced Fractal Time-Crystal-Like Dynamics and Non-Markovian Memory in the Bateman Dual Oscillator
Partha Nandi, Giuseppe Vitiello
Can a closed quantum system generate time-crystal-like nonequilibrium behavior, self-similar scaling structures, and non-Markovian memory without external driving or coupling to a…
Is Exact Markovianity Fundamental Once Time Is Relational?
Partha Nandi, Francesco Petruccione
Markovian open quantum theory assumes evolution with respect to an external classical time parameter, yet no preferred notion of time exists fundamentally in relativistic physics.…
Spin-Induced Non-Markovian Time-Crystal-Like Dynamics and Fractal Scaling in the Bateman Dual Oscillator
Partha Nandi, Giuseppe Vitiello
Can a closed quantum system generate persistent time-crystal-like dynamics without external driving? Within the Bateman dual oscillator framework, we show that the answer is affirm…
State-Selective Signatures of Quantum and Classical Gravitational Environments
Partha Nandi, Sankarshan Sahu, Bibhas Ranjan Majhi +1
A unified framework is developed for determining whether a gravitational-wave (GW) background behaves as a classical field or as a genuinely quantum environment. Unified here means…
Spinning into Quantum Geometry: Dirac and Wheeler-DeWitt Dynamics from Stochastic Helicity
Partha Nandi, Partha Ghose, Francesco Petruccione
Spin networks in loop quantum gravity provide a kinematical picture of quantum geometry but lack a natural mechanism for dynamical Dirac-type evolution, while the Wheeler--DeWitt e…
A novel quantum memory effect and thermal modulation in graviton-mediated entanglement
Mainak Dutta, Partha Nandi, Bibhas Ranjan Majhi
A central challenge in probing the quantum nature of gravity is to distinguish effects that are genuinely quantum from those that can be explained classically. In this work, we stu…
Quantum Geometric Phases as a New Window on Gravitational Waves
Partha Nandi, Frederik G. Scholtz
We investigate how low-frequency gravitational waves (LFGWs), originating from distant astrophysical or cosmological sources, can induce purely quantum geometric phases in mesoscop…
Can Non-Relativistic Strings Propagate Without Geometric Baggage?
Partha Nandi, Sk. Moinuddin, Abdus Sattar
We present a minimal and dynamically consistent formulation of non-relativistic bosonic string theory in a Newton-Cartan (NC) background. Starting from a reparametrization-invarian…
Gravitationally induced entanglement at finite temperature: A memory-driven time-crystalline phase?
Mainak Dutta, Partha Nandi, Bibhas Ranjan Majhi
We study the impact of thermal effects on gravity-induced entanglement (GIE) in a system of quantum harmonic oscillators interacting with classical linearly polarized gravitational…
Decoherence from quantum spacetime noise: An open-systems framework with application to neutrino oscillations
Partha Nandi, Tiasha Bhattacharyya, A. S. Majumdar +2
We present a general open-quantum-systems framework to model decoherence induced by stochastic Planck-scale fluctuations of spacetime, focusing on the kappa-Minkowski noncommutativ…
Unearthing Neutrino Decoherence from Quantum Spacetime: An Open Quantum Systems Perspective
Partha Nandi, Tiasha Bhattacharyya
We investigated the influence of \(κ\) Minkowski-type quantum spacetime on neutrino oscillations, revealing that spacetime fluctuations introduce a unique energy-dependent power la…
Unveiling gravity's quantum fingerprint through gravitational waves
Partha Nandi, Bibhas Ranjan Majhi
We introduce an innovative method to explore gravity's quantum aspects using a novel theoretical framework. Our model delves into gravity-induced entanglement (GIE) while sidestepp…
Quantum ballet by gravitational waves: Generating entanglement's dance of revival-collapse and memory within the quantum system
Partha Nandi, Bibhas Ranjan Majhi, Nandita Debnath +1
Recent proposals are emerging for the experimental detection of entanglement mediated by classical gravity, carrying significant theoretical and observational implications. In fact…
Magnetically Induced Schrödinger Cat States: The Shadow of a Quantum Space
Partha Nandi, Nandita Debnath, Subhajit Kala +1
Schrödinger cat states, which are superpositions of macroscopically distinct states, are potentially critical resources for upcoming quantum information technologies. In this paper…