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Quantum signatures in nonlinear gravitational waves

Journal Article · · Quantum
 [1];  [2];  [3];  [4];  [5]
  1. Pontifical Catholic University of Rio de Janeiro (Brazil)
  2. Istituto del Consiglio Nazionale delle Ricerche, OVI (Italy)
  3. Universitat de Barcelona (Spain)
  4. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  5. University of Salento, Lecce (Italy); Istituto Nazionale di Fisica Nucleare (INFN), Lecce (Italy)
The effective quantum field theory description of gravity, despite its non-renormalizability, allows for predictions beyond classical general relativity. As we enter the age of gravitational wave astronomy, an important and timely question is whether measurable quantum predictions that depart from classical gravity, analogous to quantum optics effects which cannot be explained by classical electrodynamics, can be found. In this work, we investigate quantum signatures in gravitational waves using tools from quantum optics. Squeezed-coherent gravitational waves, which can exhibit sub-Poissonian graviton statistics, can enhance or suppress the signal measured by an interferometer, a characteristic effect of quantum squeezing. Moreover, we show that Gaussian gravitational wave quantum states can be reconstructed from measurements over an ensemble of optical fields interacting with a single copy of the gravitational wave, thus opening the possibility of detecting quantum features of gravity beyond classical general relativity.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2325976
Journal Information:
Quantum, Journal Name: Quantum Vol. 6; ISSN 2521-327X
Publisher:
Quantum Science Open CommunityCopyright Statement
Country of Publication:
United States
Language:
English

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