{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T00:12:57Z","timestamp":1773360777300,"version":"3.50.1"},"reference-count":70,"publisher":"Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften","license":[{"start":{"date-parts":[[2022,12,19]],"date-time":"2022-12-19T00:00:00Z","timestamp":1671408000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["quantum-journal.org"],"crossmark-restriction":false},"short-container-title":["Quantum"],"abstract":"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.<\/jats:p>","DOI":"10.22331\/q-2022-12-19-879","type":"journal-article","created":{"date-parts":[[2022,12,19]],"date-time":"2022-12-19T16:12:04Z","timestamp":1671466324000},"page":"879","update-policy":"https:\/\/doi.org\/10.22331\/q-crossmark-policy-page","source":"Crossref","is-referenced-by-count":21,"title":["Quantum signatures in nonlinear gravitational waves"],"prefix":"10.22331","volume":"6","author":[{"given":"Thiago","family":"Guerreiro","sequence":"first","affiliation":[{"name":"Department of Physics, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22451-900, Brazil"}]},{"given":"Francesco","family":"Coradeschi","sequence":"additional","affiliation":[{"name":"Istituto del Consiglio Nazionale delle Ricerche, OVI, Italy"}]},{"given":"Antonia Micol","family":"Frassino","sequence":"additional","affiliation":[{"name":"Departament de F\u00edsica Qu\u00e0ntica i Astrof\u00edsica, Institut de Ci\u00e8ncies del Cosmos, Universitat de Barcelona, Mart\u00ed i Franqu\u00e8s 1, E-08028 Barcelona, Spain"}]},{"given":"Jennifer Rittenhouse","family":"West","sequence":"additional","affiliation":[{"name":"Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA"}]},{"given":"Enrico Junior","family":"Schioppa","sequence":"additional","affiliation":[{"name":"Dipartimento di Matematica e Fisica ``E. De Giorgi'', Universit\u00e0 del Salento, and Istituto Nazionale di Fisica Nucleare (INFN) sezione di Lecce, via per Arnesano, 73100 Lecce, Italy"}]}],"member":"9598","published-online":{"date-parts":[[2022,12,19]]},"reference":[{"key":"0","doi-asserted-by":"publisher","unstructured":"Alexander H Nitz, Collin D Capano, Sumit Kumar, Yi-Fan Wang, Shilpa Kastha, Marlin Sch\u00e4fer, Rahul Dhurkunde, and Miriam Cabero. ``3-ogc: Catalog of gravitational waves from compact-binary mergers''. The Astrophysical Journal 922, 76 (2021).","DOI":"10.3847\/1538-4357\/ac1c03"},{"key":"1","doi-asserted-by":"publisher","unstructured":"Belinda Pang and Yanbei Chen. ``Quantum interactions between a laser interferometer and gravitational waves''. Phys. Rev. D 98, 124006 (2018).","DOI":"10.1103\/PhysRevD.98.124006"},{"key":"2","doi-asserted-by":"publisher","unstructured":"Thiago Guerreiro. ``Quantum effects in gravity waves''. Classical and Quantum Gravity 37, 155001 (2020).","DOI":"10.1088\/1361-6382\/ab9d5d"},{"key":"3","doi-asserted-by":"publisher","unstructured":"Luiz Davidovich. ``Sub-poissonian processes in quantum optics''. Rev. Mod. Phys. 68, 127\u2013173 (1996).","DOI":"10.1103\/RevModPhys.68.127"},{"key":"4","doi-asserted-by":"publisher","unstructured":"Freeman Dyson. ``Is a graviton detectable?''. Int. J. Mod. Phys. A 28, 1330041 (2013).","DOI":"10.1142\/S0217751X1330041X"},{"key":"5","doi-asserted-by":"publisher","unstructured":"A. I. Lvovsky. ``Squeezed light''. Chapter 5, pages 121\u2013163. John Wiley & Sons, Ltd. (2015).","DOI":"10.48550\/arXiv.1401.4118"},{"key":"6","doi-asserted-by":"publisher","unstructured":"Francesco Coradeschi, Antonia Micol Frassino, Thiago Guerreiro, Jennifer Rittenhouse West, and Enrico Junior Schioppa. ``Can we detect the quantum nature of weak gravitational fields?''. Universe 7 (2021).","DOI":"10.3390\/universe7110414"},{"key":"7","doi-asserted-by":"publisher","unstructured":"Maulik Parikh, Frank Wilczek, and George Zahariade. ``Quantum mechanics of gravitational waves''. Phys. Rev. Lett. 127, 081602 (2021).","DOI":"10.1103\/PhysRevLett.127.081602"},{"key":"8","unstructured":"Samarth Chawla and Maulik Parikh. ``Quantum Gravity Corrections to the Fall of the Apple'' (2021). arXiv:2112.14730."},{"key":"9","doi-asserted-by":"publisher","unstructured":"Maulik Parikh, Frank Wilczek, and George Zahariade. ``Signatures of the quantization of gravity at gravitational wave detectors''. Phys. Rev. D 104, 046021 (2021).","DOI":"10.1103\/PhysRevD.104.046021"},{"key":"10","doi-asserted-by":"publisher","unstructured":"L. P. Grishchuk and Y. V. Sidorov. ``Squeezed quantum states of relic gravitons and primordial density fluctuations''. Phys. Rev. D 42, 3413\u20133421 (1990).","DOI":"10.1103\/PhysRevD.42.3413"},{"key":"11","doi-asserted-by":"publisher","unstructured":"Andreas Albrecht, Pedro Ferreira, Michael Joyce, and Tomislav Prokopec. ``Inflation and squeezed quantum states''. Phys. Rev. D 50, 4807\u20134820 (1994).","DOI":"10.1103\/PhysRevD.50.4807"},{"key":"12","doi-asserted-by":"publisher","unstructured":"Don Koks, Andrew Matacz, and B. L. Hu. ``Entropy and uncertainty of squeezed quantum open systems''. Phys. Rev. D 55, 5917\u20135935 (1997).","DOI":"10.1103\/PhysRevD.55.5917"},{"key":"13","doi-asserted-by":"publisher","unstructured":"S. Hawking. ``Black hole explosions?''. Nature 248, 30\u201331 (1974).","DOI":"10.1038\/248030a0"},{"key":"14","unstructured":"Mark P. Hertzberg and Jacob A. Litterer. ``Bound on Quantum Fluctuations in Gravitational Waves from LIGO'' (2021). arXiv:2112.12159."},{"key":"15","doi-asserted-by":"publisher","unstructured":"W. Schleich and J. A. Wheeler. ``Oscillations in photon distribution of squeezed states''. J. Opt. Soc. Am. B 4, 1715\u20131722 (1987).","DOI":"10.1364\/JOSAB.4.001715"},{"key":"16","unstructured":"Charles W. Misner, K. S. Thorne, and J. A. Wheeler. ``Gravitation''. W. H. Freeman. San Francisco (1973)."},{"key":"17","doi-asserted-by":"publisher","unstructured":"M. S. Safronova, D. Budker, D. DeMille, Derek F. Jackson Kimball, A. Derevianko, and Charles W. Clark. ``Search for new physics with atoms and molecules''. Rev. Mod. Phys. 90, 025008 (2018).","DOI":"10.1103\/RevModPhys.90.025008"},{"key":"18","doi-asserted-by":"publisher","unstructured":"Fernando Monteiro, Gadi Afek, Daniel Carney, Gordan Krnjaic, Jiaxiang Wang, and David C. Moore. ``Search for composite dark matter with optically levitated sensors''. Phys. Rev. Lett. 125, 181102 (2020).","DOI":"10.1103\/PhysRevLett.125.181102"},{"key":"19","doi-asserted-by":"publisher","unstructured":"Charles P. Blakemore, Alexander Fieguth, Akio Kawasaki, Nadav Priel, Denzal Martin, Alexander D. Rider, Qidong Wang, and Giorgio Gratta. ``Search for non-newtonian interactions at micrometer scale with a levitated test mass''. Phys. Rev. D 104, L061101 (2021).","DOI":"10.1103\/PhysRevD.104.L061101"},{"key":"20","doi-asserted-by":"publisher","unstructured":"David C Moore and Andrew A Geraci. ``Searching for new physics using optically levitated sensors''. Quantum Science and Technology 6, 014008 (2021).","DOI":"10.1088\/2058-9565\/abcf8a"},{"key":"21","doi-asserted-by":"publisher","unstructured":"K. M. Backes et al. ``A quantum enhanced search for dark matter axions''. NaturePage 238 (2021).","DOI":"10.1038\/s41586-021-03226-7"},{"key":"22","doi-asserted-by":"publisher","unstructured":"Deniz Aybas, Janos Adam, Emmy Blumenthal, Alexander V. Gramolin, Dorian Johnson, Annalies Kleyheeg, Samer Afach, John W. Blanchard, Gary P. Centers, Antoine Garcon, Martin Engler, Nataniel L. Figueroa, Marina Gil Sendra, Arne Wickenbrock, Matthew Lawson, Tao Wang, Teng Wu, Haosu Luo, Hamdi Mani, Philip Mauskopf, Peter W. Graham, Surjeet Rajendran, Derek F. Jackson Kimball, Dmitry Budker, and Alexander O. Sushkov. ``Search for axionlike dark matter using solid-state nuclear magnetic resonance''. Phys. Rev. Lett. 126, 141802 (2021).","DOI":"10.1103\/PhysRevLett.126.141802"},{"key":"23","doi-asserted-by":"publisher","unstructured":"Peter W. Graham, David E. Kaplan, Jeremy Mardon, Surjeet Rajendran, William A. Terrano, Lutz Trahms, and Thomas Wilkason. ``Spin precession experiments for light axionic dark matter''. Phys. Rev. D 97, 055006 (2018).","DOI":"10.1103\/PhysRevD.97.055006"},{"key":"24","doi-asserted-by":"publisher","unstructured":"K. Wurtz, B.M. Brubaker, Y. Jiang, E.P. Ruddy, D.A. Palken, and K.W. Lehnert. ``Cavity entanglement and state swapping to accelerate the search for axion dark matter''. PRX Quantum 2, 040350 (2021).","DOI":"10.1103\/PRXQuantum.2.040350"},{"key":"25","doi-asserted-by":"publisher","unstructured":"J. Estrada, R. Harnik, D. Rodrigues, and M. Senger. ``Searching for dark particles with quantum optics''. PRX Quantum 2, 030340 (2021).","DOI":"10.1103\/PRXQuantum.2.030340"},{"key":"26","doi-asserted-by":"publisher","unstructured":"D Carney, G Krnjaic, D C Moore, C A Regal, G Afek, S Bhave, B Brubaker, T Corbitt, J Cripe, N Crisosto, A Geraci, S Ghosh, J G E Harris, A Hook, E W Kolb, J Kunjummen, R F Lang, T Li, T Lin, Z Liu, J Lykken, L Magrini, J Manley, N Matsumoto, A Monte, F Monteiro, T Purdy, C J Riedel, R Singh, S Singh, K Sinha, J M Taylor, J Qin, D J Wilson, and Y Zhao. ``Mechanical quantum sensing in the search for dark matter''. Quantum Science and Technology 6, 024002 (2021).","DOI":"10.1088\/2058-9565\/abcfcd"},{"key":"27","doi-asserted-by":"publisher","unstructured":"Tanjung Krisnanda, Margherita Zuppardo, Mauro Paternostro, and Tomasz Paterek. ``Revealing nonclassicality of inaccessible objects''. Phys. Rev. Lett. 119, 120402 (2017).","DOI":"10.1103\/PhysRevLett.119.120402"},{"key":"28","doi-asserted-by":"publisher","unstructured":"Sougato Bose, Anupam Mazumdar, Gavin W. Morley, Hendrik Ulbricht, Marko Toro\u0161, Mauro Paternostro, Andrew A. Geraci, Peter F. Barker, M. S. Kim, and Gerard Milburn. ``Spin entanglement witness for quantum gravity''. Phys. Rev. Lett. 119, 240401 (2017).","DOI":"10.1103\/PhysRevLett.119.240401"},{"key":"29","doi-asserted-by":"publisher","unstructured":"C. Marletto and V. Vedral. ``Gravitationally induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity''. Phys. Rev. Lett. 119, 240402 (2017).","DOI":"10.1103\/PhysRevLett.119.240402"},{"key":"30","doi-asserted-by":"publisher","unstructured":"Teodora Oniga and Charles H.-T. Wang. ``Quantum gravitational decoherence of light and matter''. Phys. Rev. D 93, 044027 (2016).","DOI":"10.1103\/PhysRevD.93.044027"},{"key":"31","doi-asserted-by":"publisher","unstructured":"Daniel Carney, Holger M\u00fcller, and Jacob M. Taylor. ``Using an atom interferometer to infer gravitational entanglement generation''. PRX Quantum 2, 030330 (2021).","DOI":"10.1103\/PRXQuantum.2.030330"},{"key":"32","doi-asserted-by":"crossref","unstructured":"Daniel Carney, Holger M\u00fcller, and Jacob M. Taylor. ``Comment on using an atom interferometer to infer gravitational entanglement generation'' (2021). arXiv:2111.04667.","DOI":"10.1103\/PRXQuantum.2.030330"},{"key":"33","doi-asserted-by":"publisher","unstructured":"Kirill Streltsov, Julen Simon Pedernales, and Martin Bodo Plenio. ``On the Significance of Interferometric Revivals for the Fundamental Description of Gravity''. Universe 8, 58 (2022). arXiv:2111.04570.","DOI":"10.3390\/universe8020058"},{"key":"34","doi-asserted-by":"publisher","unstructured":"Tobias Westphal, Hans Hepach, Jeremias Pfaff, and Markus Aspelmeyer. ``Measurement of gravitational coupling between millimetre-sized masses''. NaturePage 225 (2021).","DOI":"10.1038\/s41586-021-03250-7"},{"key":"35","doi-asserted-by":"publisher","unstructured":"Markus Aspelmeyer. ``When Zeh Meets Feynman: How to Avoid the Appearance of a Classical World in Gravity Experiments''. Fundam. Theor. Phys. 204, 85\u201395 (2022). arXiv:2203.05587.","DOI":"10.1007\/978-3-030-88781-0_5"},{"key":"36","doi-asserted-by":"publisher","unstructured":"Rafal Demkowicz-Dobrza\u0144ski, Marcin Jarzyna, and Jan Ko\u0142ody\u0144ski. ``Chapter four - quantum limits in optical interferometry''. Volume 60 of Progress in Optics, pages 345\u2013435. Elsevier. (2015).","DOI":"10.1016\/bs.po.2015.02.003"},{"key":"37","unstructured":"Marko Toro\u0161, Anupam Mazumdar, and Sougato Bose. ``Loss of coherence of matter-wave interferometer from fluctuating graviton bath'' (2020). arXiv:2008.08609."},{"key":"38","doi-asserted-by":"publisher","unstructured":"Alessandra Buonanno and Yanbei Chen. ``Scaling law in signal recycled laser-interferometer gravitational-wave detectors''. Phys. Rev. D 67, 062002 (2003).","DOI":"10.1103\/PhysRevD.67.062002"},{"key":"39","doi-asserted-by":"crossref","unstructured":"Marlan O. Scully and M. Suhail Zubairy. ``Quantum optics''. Cambridge University Press. (1997).","DOI":"10.1017\/CBO9780511813993"},{"key":"40","doi-asserted-by":"publisher","unstructured":"Igor Brand\u00e3o, Bruno Suassuna, Bruno Melo, and Thiago Guerreiro. ``Entanglement dynamics in dispersive optomechanics: Nonclassicality and revival''. Phys. Rev. Research 2, 043421 (2020).","DOI":"10.1103\/PhysRevResearch.2.043421"},{"key":"41","doi-asserted-by":"publisher","unstructured":"M. P. Blencowe. ``Effective field theory approach to gravitationally induced decoherence''. Phys. Rev. Lett. 111, 021302 (2013).","DOI":"10.1103\/PhysRevLett.111.021302"},{"key":"42","doi-asserted-by":"publisher","unstructured":"A. A. Clerk, M. H. Devoret, S. M. Girvin, Florian Marquardt, and R. J. Schoelkopf. ``Introduction to quantum noise, measurement, and amplification''. Rev. Mod. Phys. 82, 1155\u20131208 (2010).","DOI":"10.1103\/RevModPhys.82.1155"},{"key":"43","doi-asserted-by":"publisher","unstructured":"E. Oudot, P. Sekatski, F. Fr\u00f6wis, N. Gisin, and N. Sangouard. ``Two-mode squeezed states as schr\u00f6dinger cat-like states''. J. Opt. Soc. Am. B 32, 2190\u20132197 (2015).","DOI":"10.1364\/JOSAB.32.002190"},{"key":"44","doi-asserted-by":"publisher","unstructured":"Wojciech H. Zurek, Salman Habib, and Juan Pablo Paz. ``Coherent states via decoherence''. Phys. Rev. Lett. 70, 1187\u20131190 (1993).","DOI":"10.1103\/PhysRevLett.70.1187"},{"key":"45","doi-asserted-by":"publisher","unstructured":"Charles W Misner, Kip Thorne, and Wojciech \u017burek. ``John wheeler, relativity, and quantum information''. Physics Today 62 (2009).","DOI":"10.1063\/1.3120895"},{"key":"46","doi-asserted-by":"crossref","unstructured":"DF Walls and GJ Milburn. ``Quantum optics (springer, berlin'' (1994).","DOI":"10.1007\/978-3-642-79504-6"},{"key":"47","doi-asserted-by":"publisher","unstructured":"Edward B. Rockower. ``Calculating the quantum characteristic function and the photon-number generating function in quantum optics''. Phys. Rev. A 37, 4309\u20134318 (1988).","DOI":"10.1103\/PhysRevA.37.4309"},{"key":"48","doi-asserted-by":"publisher","unstructured":"Christian Weedbrook, Stefano Pirandola, Ra\u00fal Garc\u00eda-Patr\u00f3n, Nicolas J. Cerf, Timothy C. Ralph, Jeffrey H. Shapiro, and Seth Lloyd. ``Gaussian quantum information''. Rev. Mod. Phys. 84, 621\u2013669 (2012).","DOI":"10.1103\/RevModPhys.84.621"},{"key":"49","doi-asserted-by":"publisher","unstructured":"V. V. Dodonov, O. V. Man'ko, and V. I. Man'ko. ``Multidimensional hermite polynomials and photon distribution for polymode mixed light''. Phys. Rev. A 50, 813\u2013817 (1994).","DOI":"10.1103\/PhysRevA.50.813"},{"key":"50","doi-asserted-by":"publisher","unstructured":"Michael Vanner, Igor Pikovski, and M. Kim. ``Towards optomechanical quantum state reconstruction of mechanical motion''. Annalen der Physik 527 (2015).","DOI":"10.1002\/andp.201400124"},{"key":"51","unstructured":"Robert W. Boyd. ``Nonlinear optics''. Academic Press. (2008)."},{"key":"52","unstructured":"L. D. Landau and E. M. Lifshitz. ``The classical theory of fields course of theoretical physics''. Butterworth-Heinemann. (1975)."},{"key":"53","doi-asserted-by":"publisher","unstructured":"Benjamin P. Abbott et al. ``The basic physics of the binary black hole merger GW150914''. Annalen Phys. 529, 1600209 (2017). arXiv:1608.01940.","DOI":"10.1002\/andp.201600209"},{"key":"54","unstructured":"F. Shojaei Arani, M. Bagheri Harouni, B. Lamine, and A. Blanchard. ``Imprints of the Squeezed Primordial Gravitational Waves on the Quantum Electromagnetic Field'' (2021). arXiv:2110.10962."},{"key":"55","doi-asserted-by":"publisher","unstructured":"Bonny L. Schumaker and Carlton M. Caves. ``New formalism for two-photon quantum optics. ii. mathematical foundation and compact notation''. Phys. Rev. A 31, 3093\u20133111 (1985).","DOI":"10.1103\/PhysRevA.31.3093"},{"key":"56","doi-asserted-by":"publisher","unstructured":"Andreas Albrecht, Pedro Ferreira, Michael Joyce, and Tomislav Prokopec. ``Inflation and squeezed quantum states''. Phys. Rev. D 50, 4807\u20134820 (1994). arXiv:astro-ph\/9303001.","DOI":"10.1103\/PhysRevD.50.4807"},{"key":"57","doi-asserted-by":"publisher","unstructured":"Sugumi Kanno and Jiro Soda. ``Detecting nonclassical primordial gravitational waves with hanbury-brown\u2013twiss interferometry''. Phys. Rev. D 99, 084010 (2019).","DOI":"10.1103\/PhysRevD.99.084010"},{"key":"58","doi-asserted-by":"publisher","unstructured":"Dieter R. Brill and James B. Hartle. ``Method of the self-consistent field in general relativity and its application to the gravitational geon''. Phys. Rev. 135, B271\u2013B278 (1964).","DOI":"10.1103\/PhysRev.135.B271"},{"key":"59","doi-asserted-by":"publisher","unstructured":"R. F. Sawyer. ``Quantum break in high intensity gravitational wave interactions''. Phys. Rev. Lett. 124, 101301 (2020).","DOI":"10.1103\/PhysRevLett.124.101301"},{"key":"60","doi-asserted-by":"publisher","unstructured":"M. T. Grisaru, P. van Nieuwenhuizen, and C. C. Wu. ``Gravitational born amplitudes and kinematical constraints''. Phys. Rev. D 12, 397\u2013403 (1975).","DOI":"10.1103\/PhysRevD.12.397"},{"key":"61","doi-asserted-by":"publisher","unstructured":"Yosef Zlochower, Roberto G\u00f3mez, Sascha Husa, Luis Lehner, and Jeffrey Winicour. ``Mode coupling in the nonlinear response of black holes''. Phys. Rev. D 68, 084014 (2003).","DOI":"10.1103\/PhysRevD.68.084014"},{"key":"62","doi-asserted-by":"publisher","unstructured":"Aaron Zimmerman and Zachary Mark. ``Damped and zero-damped quasinormal modes of charged, nearly extremal black holes''. Phys. Rev. D 93, 044033 (2016).","DOI":"10.1103\/PhysRevD.93.044033"},{"key":"63","doi-asserted-by":"publisher","unstructured":"Andrzej Rostworowski. ``Towards a theory of nonlinear gravitational waves: A systematic approach to nonlinear gravitational perturbations in the vacuum''. Phys. Rev. D 96, 124026 (2017).","DOI":"10.1103\/PhysRevD.96.124026"},{"key":"64","doi-asserted-by":"publisher","unstructured":"Laura Sberna, Pablo Bosch, William E. East, Stephen R. Green, and Luis Lehner. ``Nonlinear effects in the black hole ringdown: Absorption-induced mode excitation''. Phys. Rev. D 105, 064046 (2022).","DOI":"10.1103\/PhysRevD.105.064046"},{"key":"65","doi-asserted-by":"publisher","unstructured":"Hsin-Yuan Huang et al. ``Quantum advantage in learning from experiments''. Science 376, abn7293 (2022). arXiv:2112.00778.","DOI":"10.1126\/science.abn7293"},{"key":"66","unstructured":"Bruce Allen. ``The Stochastic gravity wave background: Sources and detection'' (1996). arXiv:gr-qc\/9604033."},{"key":"67","doi-asserted-by":"publisher","unstructured":"G. Massimo Palma, Kalle-Antti Suominen, and Artur K. Ekert. ``Quantum computers and dissipation''. Proc. Roy. Soc. Lond. A 452, 567\u2013584 (1996). arXiv:quant-ph\/9702001.","DOI":"10.1098\/rspa.1996.0029"},{"key":"68","unstructured":"V. Vedral. ``Decoherence of massive superpositions induced by coupling to a quantized gravitational field'' (2020). arXiv:2005.14596."},{"key":"69","doi-asserted-by":"publisher","unstructured":"Andreas Albrecht, Pedro Ferreira, Michael Joyce, and Tomislav Prokopec. ``Inflation and squeezed quantum states''. Phys. Rev. D 50, 4807\u20134820 (1994).","DOI":"10.1103\/PhysRevD.50.4807"}],"container-title":["Quantum"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/quantum-journal.org\/papers\/q-2022-12-19-879\/pdf\/","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2022,12,19]],"date-time":"2022-12-19T16:12:12Z","timestamp":1671466332000},"score":1,"resource":{"primary":{"URL":"https:\/\/quantum-journal.org\/papers\/q-2022-12-19-879\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,19]]},"references-count":70,"URL":"https:\/\/doi.org\/10.22331\/q-2022-12-19-879","archive":["CLOCKSS"],"relation":{},"ISSN":["2521-327X"],"issn-type":[{"value":"2521-327X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,12,19]]},"article-number":"879"}}