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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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Autor principal: Giovannini, Massimo
Lenguaje:eng
Publicado: 2019
Materias:
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
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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