Indirect detection of gravitons through quantum entanglement

Abstract

We propose an experiment that the entanglement between two macroscopic mirrors suspended at the end of an equal-arm interferometer is destroyed by the noise of gravitons through bremsstrahlung. By calculating the correlation function of the noise, we obtain the decoherence time from the decoherence functional. We estimate that the decoherence time induced by the noise of gravitons in squeezed states stemming from inflation is approximately 20 seconds for 40 km long arms and 40 kg mirrors. Our analysis shows that observation of the decoherence time of quantum entanglement has the potential to detect gravitons indirectly. This indirect detection of gravitons would give strong evidence of quantum gravity.

5 pages, 2 figures

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• Loss of coherence and coherence protection from a graviton bath
• Squeezed quantum states of graviton and axion in the universe
• Conversion of squeezed gravitons into photons during inflation
• Effects of photon field on entanglement generation in charged particles
• Impact of quantum entanglement induced by magnetic fields on primordial gravitational waves
• A peak in the power spectrum of primordial gravitational waves induced by primordial dark magnetic fields
• Graviton noise:the Heisenberg picture
• Harvesting quantum coherence from axion dark matter
• Cosmological Geometric Phase From Pure Quantum States: A study without/with having Bell's inequality violation
• Can we detect the quantum nature of weak gravitational fields?
• $e^{+}{e}^{-}$ annihilation on the stochastic background of primordial gravitational waves with BKP18