Indirect detection of gravitons through quantum entanglement

Sugumi Kanno, Jiro Soda, Junsei Tokuda

Research output: Contribution to journalArticlepeer-review

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 s 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.

Original languageEnglish
Article numberA21
JournalPhysical Review D
Volume104
Issue number8
DOIs
Publication statusPublished - Oct 15 2021

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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