article · Annalen der Physik
Examining quantum correlations in a theoretical setup of three gravitationally interacting masses under an oscillatory magnetic field provides insights into multipartite quantum behaviour. Using a thermal density matrix formalism, the dynamics of quantum coherence, entanglement, local quantum uncertainty, and local quantum Fisher information are evaluated across varying temperatures and coupling strengths. The results show that strong gravitational coupling suppresses time-dependent variations in coherence, while entanglement demonstrates notable resilience against thermal disturbances alongside a non-monotonic response to magnetic parameters. Additionally, local quantum uncertainty proves highly responsive to external magnetic driving, whereas local quantum Fisher information preserves robust metrological properties. Analysis of the system energy spectrum also reveals quasi-flat bands formed by symmetry cancellations, outlining the interplay between gravity, magnetic fields, and thermal environments in multi-body quantum mechanics.
Understanding how gravitational forces and external magnetic fields interact at the quantum scale is fundamental to modern physics. By demonstrating how quantum correlations survive thermal disruption and respond to dynamic external forces, this work aids the conceptual design of resilient quantum states. It provides valuable theoretical foundations for developing advanced measurement techniques where quantum properties must endure complex physical environments.
The abstract highlights potential applications in quantum sensing and metrology, which may eventually interest designers of ultra-sensitive measurement devices. However, this work is early-stage theoretical research focused on mathematical modelling of quantum masses. Substantial experimental validation and laboratory implementation would be necessary before any practical sensing technologies or commercial instruments could be developed.
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ABSTRACT We investigate time‐dependent quantum correlations in a system of three gravitationally coupled quantum masses subjected to an oscillatory magnetic field , using the thermal density matrix formalism, we analyze the dynamics of quantum coherence , quantum negativity , local quantum uncertainty (), and local quantum Fisher information () as functions of time and key physical parameters, including the gravitational coupling strength , magnetic field amplitude , magnetic–mass coupling constant , intrinsic energy , and temperature . Our results reveal rich dynamical behavior: quantum coherence exhibits pronounced temporal minima for moderate , while strong coupling suppresses time dependence, while entanglement remains robust against thermal effects and shows a non‐monotonic dependence on magnetic field parameters, moreover, and display complementary behaviors, with being highly sensitive to external driving, whereas retains strong metrological robustness, analysis of the instantaneous energy spectrum reveals eigenstates with distinct sensitivities to gravitational, and magnetic interactions, including quasi‐flat bands arising from effective symmetry cancellations, these findings clarify the interplay between gravity, magnetic driving, and thermal effects in multipartite quantum systems and highlight potential applications in quantum sensing and metrology.
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DOI: 10.1002/andp.70271
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