• Corpus ID: 244714234

Leggett-Garg inequalities for testing quantumness of gravity

@inproceedings{Matsumura2021LeggettGargIF,
  title={Leggett-Garg inequalities for testing quantumness of gravity},
  author={Akira Matsumura and Yasusada Nambu and Kazuhiro Yamamoto},
  year={2021}
}
In this study, we determine a violation of the Leggett-Garg inequalities due to gravitational interaction in a hybrid system consisting of a harmonic oscillator and a spatially localized superposed particle. The violation of the Leggett-Garg inequalities is discussed using the two-time quasiprobability in connection with the entanglement negativity generated by gravitational interaction. It is demonstrated that the entanglement suppresses the violation of the Leggett-Garg inequalities when one… 
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