Detecting gravitational waves by emission of photons from charged Weber bars

Abstract

In this work, we propose a novel experimental set-up using charged resonant gravitational wave detectors. We exploit the semi-classical analogue of the Gertsenshtein effect where the gravitational wave acts as an modulator for the optomechanical system. We consider a cavity QED scenario where the Weber bar is placed inside an electromagnetically shielded cavity. We observer that when the gravitational wave falls on the Weber bar, it emits photon which signifies the detection of gravitational waves by the resonant bars. The frequency controlled spontaneous emission scenario will shed a new light on future generation of efficient gravitational wave detector models.

Figures (2)

• Figure 1: The resonant bar is modelled by a smaller mass particle of mass $m_0$ connected to a heavier mass particle with mass $m_\infty$ where the two particles are connected by a spring with oscillation frequency $\omega_0$ and the particle with mass $m_\infty$ follows a time-like geodesic $\zeta_\tau$.
• Figure 2: A schematic diagram (not to scale) of an array resonant bar detector based on the principle of semiclassical Gertsenshtein effect where the mechanical coherent array of oscillators act as a transducer converting the gravitational wave into low frequency photons while simultaneously getting excited. This collective signal is then converted into visible DC output signal using a superconducting quantum interference device.