Observable quantum entanglement due to gravity

Tanjung Krisnanda , Guo Yao Tham , Mauro Paternostro , Tomasz Paterek

Abstract

No experiment to date has provided evidence for quantum features of the gravitational interaction. Recently proposed testssuggest looking for the generation of quantum entanglement between massive objects as a possible route towards the observationof such features. Motivated by advances in optical cooling of mirrors, here we provide a systematic study of entanglement betweentwo masses that are coupled gravitationally. Wefirst consider the masses trapped at all times in harmonic potentials(optomechanics) and then the masses released from the traps. This leads to the estimate of the experimental parameters requiredfor the observation of gravitationally induced entanglement. The optomechanical setup demands LIGO-like mirrors and squeezingor long coherence times, but the released masses can be light and accumulate detectable entanglement in a timescale shorter thantheir coherence times. No macroscopic quantum superposition develops during the evolution. We discuss the implications fromsuch thought experiments regarding the nature of the gravitational coupling.
Author Tanjung Krisnanda
Tanjung Krisnanda,,
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, Guo Yao Tham
Guo Yao Tham,,
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, Mauro Paternostro
Mauro Paternostro,,
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, Tomasz Paterek (FMPI/ITPA)
Tomasz Paterek,,
- Institute of Theoretical Physics and Astrophysics
Journal seriesnpj Quantum Information, ISSN 2056-6387, (N/A 200 pkt)
Issue year2020
Vol6
Pages1-6
Publication size in sheets0.50
Article number12
DOIDOI:10.1038/s41534-020-0243-y
URL https://www.nature.com/articles/s41534-020-0243-y.pdf
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)200
Score sourcejournalList
ScoreMinisterial score = 200.0, 14-07-2020, ArticleFromJournal
Publication indicators WoS Citations = 1.000; WoS Impact Factor: 2018 = 8.270 (2) - 2018=9.181 (5)
Citation count*11 (2020-07-14)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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