Footprint of spatial noncommutativity in resonant detectors of gravitational wave

TL;DR

This paper explores how the noncommutative structure of space could influence gravitational wave detectors, proposing that GW data might reveal signatures of spatial noncommutativity through modifications in detector response and transition probabilities.

Contribution

It introduces a theoretical framework to detect spatial noncommutativity effects in GW detectors and calculates their impact on detector response and phonon transition probabilities.

Findings

Noncommutativity modifies the resonant frequency response of GW detectors.

Spatial noncommutativity affects transition probabilities of phonon modes.

Perturbative calculations include both time-independent and time-dependent effects.

Abstract

The present day gravitational wave (GW) detectors strive to detect the length variation $\delta L = h L$, which, owing to the smallness of the metric perturbation $\sim h$, is an extremely small length $\mathcal{O} \sim 10^{-18} - 10^{-21}$ meter. The recently proposed noncommutative structure of space has a characteristic length-scale $\sqrt{\theta}$ which has an estimated upper-bound in similar length-scale range. We therefore propose that GW data can be used as an effective probe of noncommutative structure of space and demonstrate how spatial noncommutativity modifies the responding frequency of the resonant mass detectors of GW and also the corresponding probabilities of GW induced transitions that the phonon modes of the resonant mass detectors undergo. In this paper we present the complete perturbative calculation involving both time-independent and time-dependent perturbation terms in the Hamiltonian.