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Quantum coherence of relic gravitons and Hanbury Brown-Twiss interferometry
The coherence of the relic gravitons is investigated within a quantum mechanical perspective. After introducing the notion and the properties of the generalized Glauber correlators valid in the tensor case, the degrees of first- and second-order coherence are evaluated both inside and beyond the eff...
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Lenguaje: | eng |
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2019
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Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.99.123507 http://cds.cern.ch/record/2667524 |
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author | Giovannini, Massimo |
author_facet | Giovannini, Massimo |
author_sort | Giovannini, Massimo |
collection | CERN |
description | The coherence of the relic gravitons is investigated within a quantum mechanical perspective. After introducing the notion and the properties of the generalized Glauber correlators valid in the tensor case, the degrees of first- and second-order coherence are evaluated both inside and beyond the effective horizon. The inclusive approach (encompassing the polarizations of the gravitons) is contrasted with the exclusive approximation where the total intensity is calculated either from a single polarization or even from a single mode of the field. While the relic gravitons reentering the effective horizon after the end of a quasi-de Sitter stage of expansion are first-order coherent, the Hanbury Brown-Twiss correlations always exhibit a super-Poissonian statistics with different quantitative features that depend on the properties of their initial states and on the average over the tensor polarizations. |
id | cern-2667524 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2019 |
record_format | invenio |
spelling | cern-26675242022-08-10T12:24:21Zdoi:10.1103/PhysRevD.99.123507http://cds.cern.ch/record/2667524engGiovannini, MassimoQuantum coherence of relic gravitons and Hanbury Brown-Twiss interferometryhep-phParticle Physics - Phenomenologygr-qcGeneral Relativity and Cosmologyastro-ph.COAstrophysics and Astronomyhep-thParticle Physics - TheoryThe coherence of the relic gravitons is investigated within a quantum mechanical perspective. After introducing the notion and the properties of the generalized Glauber correlators valid in the tensor case, the degrees of first- and second-order coherence are evaluated both inside and beyond the effective horizon. The inclusive approach (encompassing the polarizations of the gravitons) is contrasted with the exclusive approximation where the total intensity is calculated either from a single polarization or even from a single mode of the field. While the relic gravitons reentering the effective horizon after the end of a quasi-de Sitter stage of expansion are first-order coherent, the Hanbury Brown-Twiss correlations always exhibit a super-Poissonian statistics with different quantitative features that depend on the properties of their initial states and on the average over the tensor polarizations.arXiv:1902.11075CERN-TH-2019-090oai:cds.cern.ch:26675242019-02-28 |
spellingShingle | hep-ph Particle Physics - Phenomenology gr-qc General Relativity and Cosmology astro-ph.CO Astrophysics and Astronomy hep-th Particle Physics - Theory Giovannini, Massimo Quantum coherence of relic gravitons and Hanbury Brown-Twiss interferometry |
title | Quantum coherence of relic gravitons and Hanbury Brown-Twiss interferometry |
title_full | Quantum coherence of relic gravitons and Hanbury Brown-Twiss interferometry |
title_fullStr | Quantum coherence of relic gravitons and Hanbury Brown-Twiss interferometry |
title_full_unstemmed | Quantum coherence of relic gravitons and Hanbury Brown-Twiss interferometry |
title_short | Quantum coherence of relic gravitons and Hanbury Brown-Twiss interferometry |
title_sort | quantum coherence of relic gravitons and hanbury brown-twiss interferometry |
topic | hep-ph Particle Physics - Phenomenology gr-qc General Relativity and Cosmology astro-ph.CO Astrophysics and Astronomy hep-th Particle Physics - Theory |
url | https://dx.doi.org/10.1103/PhysRevD.99.123507 http://cds.cern.ch/record/2667524 |
work_keys_str_mv | AT giovanninimassimo quantumcoherenceofrelicgravitonsandhanburybrowntwissinterferometry |