Quantum field corrections to the equation of state of freely streaming matter in the Friedman–Lemaître–Robertson–Walker space-time

Quantum field corrections to the equation of state of freely streaming matter in the Friedman–Lemaître–Robertson–Walker space-time

We calculate the energy density and pressure of a scalar field after its decoupling from a thermal bath in the spatially flat Friedman–Lemaître–Robertson–Walker space-time, within the framework of quantum statistical mechanics. By using the density operator determined by the condition of local therm...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Classical and quantum gravity 2023-09, Vol.40 (17), p.175007
Hauptverfasser: Becattini, F, Roselli, D
Format: Artikel
Sprache:eng
Schlagworte:
cosmological metric
quantum fields in curved spacetime
quantum relativistic statistical mechanics
thermal expectation values
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page
container_issue 17
container_start_page 175007
container_title Classical and quantum gravity
container_volume 40
creator Becattini, F
Roselli, D
description We calculate the energy density and pressure of a scalar field after its decoupling from a thermal bath in the spatially flat Friedman–Lemaître–Robertson–Walker space-time, within the framework of quantum statistical mechanics. By using the density operator determined by the condition of local thermodynamic equilibrium, we calculate the mean value of the stress-energy tensor of a real scalar field by subtracting the vacuum expectation value at the time of the decoupling. The obtained expressions of energy density and pressure involve corrections with respect to the classical free-streaming solution of the relativistic Boltzmann equation, which may become relevant even at long times.
doi_str_mv 10.1088/1361-6382/ace495
format Article
fullrecord <record><control><sourceid>iop_cross</sourceid><recordid>TN_cdi_iop_journals_10_1088_1361_6382_ace495</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>cqgace495</sourcerecordid><originalsourceid>FETCH-LOGICAL-c322t-33502d98e43a01e480330fa7e7eff492b10f2adaccd4bf88e0b78a63e27375d43</originalsourceid><addsrcrecordid>eNp1kE1OwzAQhS0EEqWwZ-kDEOqf_DhLVFFAqoRAIJbRJBmDSxIX21l0x5Y19-AS3ISTkFDEjtXMPL03evoIOebslDOlZlymPEqlEjOoMM6THTL5k3bJhIk0jnKp-D458H7FGOeKiwl5u-mhC31LtcGmppV1DqtgbOdpsDQ8IcWXHkaBWk19gIDjoh1isxluh9Ca7pG2EAI6arqfzMIZrFvovl7fl9jC58fgG_ZbW6IL3o76AzTPQ8Cvh7pRMC0ekj0Njcej3zkl94vzu_lltLy-uJqfLaNKChEiKRMm6lxhLIFxjBWTkmnIMEOt41yUnGkBNVRVHZdaKWRlpiCVKDKZJXUsp4Rt_1bOeu9QF2tnWnCbgrNiRFmM3IqRW7FFOUROthFj18XK9q4bCv5v_wa6Jnwk</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Quantum field corrections to the equation of state of freely streaming matter in the Friedman–Lemaître–Robertson–Walker space-time</title><source>IOP Publishing Journals</source><source>Institute of Physics (IOP) Journals - HEAL-Link</source><creator>Becattini, F ; Roselli, D</creator><creatorcontrib>Becattini, F ; Roselli, D</creatorcontrib><description>We calculate the energy density and pressure of a scalar field after its decoupling from a thermal bath in the spatially flat Friedman–Lemaître–Robertson–Walker space-time, within the framework of quantum statistical mechanics. By using the density operator determined by the condition of local thermodynamic equilibrium, we calculate the mean value of the stress-energy tensor of a real scalar field by subtracting the vacuum expectation value at the time of the decoupling. The obtained expressions of energy density and pressure involve corrections with respect to the classical free-streaming solution of the relativistic Boltzmann equation, which may become relevant even at long times.</description><identifier>ISSN: 0264-9381</identifier><identifier>EISSN: 1361-6382</identifier><identifier>DOI: 10.1088/1361-6382/ace495</identifier><identifier>CODEN: CQGRDG</identifier><language>eng</language><publisher>IOP Publishing</publisher><subject>cosmological metric ; quantum fields in curved spacetime ; quantum relativistic statistical mechanics ; thermal expectation values</subject><ispartof>Classical and quantum gravity, 2023-09, Vol.40 (17), p.175007</ispartof><rights>2023 The Author(s). Published by IOP Publishing Ltd</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c322t-33502d98e43a01e480330fa7e7eff492b10f2adaccd4bf88e0b78a63e27375d43</citedby><cites>FETCH-LOGICAL-c322t-33502d98e43a01e480330fa7e7eff492b10f2adaccd4bf88e0b78a63e27375d43</cites><orcidid>0000-0001-9956-9114</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1361-6382/ace495/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,776,780,27903,27904,53824,53871</link.rule.ids></links><search><creatorcontrib>Becattini, F</creatorcontrib><creatorcontrib>Roselli, D</creatorcontrib><title>Quantum field corrections to the equation of state of freely streaming matter in the Friedman–Lemaître–Robertson–Walker space-time</title><title>Classical and quantum gravity</title><addtitle>CQG</addtitle><addtitle>Class. Quantum Grav</addtitle><description>We calculate the energy density and pressure of a scalar field after its decoupling from a thermal bath in the spatially flat Friedman–Lemaître–Robertson–Walker space-time, within the framework of quantum statistical mechanics. By using the density operator determined by the condition of local thermodynamic equilibrium, we calculate the mean value of the stress-energy tensor of a real scalar field by subtracting the vacuum expectation value at the time of the decoupling. The obtained expressions of energy density and pressure involve corrections with respect to the classical free-streaming solution of the relativistic Boltzmann equation, which may become relevant even at long times.</description><subject>cosmological metric</subject><subject>quantum fields in curved spacetime</subject><subject>quantum relativistic statistical mechanics</subject><subject>thermal expectation values</subject><issn>0264-9381</issn><issn>1361-6382</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><recordid>eNp1kE1OwzAQhS0EEqWwZ-kDEOqf_DhLVFFAqoRAIJbRJBmDSxIX21l0x5Y19-AS3ISTkFDEjtXMPL03evoIOebslDOlZlymPEqlEjOoMM6THTL5k3bJhIk0jnKp-D458H7FGOeKiwl5u-mhC31LtcGmppV1DqtgbOdpsDQ8IcWXHkaBWk19gIDjoh1isxluh9Ca7pG2EAI6arqfzMIZrFvovl7fl9jC58fgG_ZbW6IL3o76AzTPQ8Cvh7pRMC0ekj0Njcej3zkl94vzu_lltLy-uJqfLaNKChEiKRMm6lxhLIFxjBWTkmnIMEOt41yUnGkBNVRVHZdaKWRlpiCVKDKZJXUsp4Rt_1bOeu9QF2tnWnCbgrNiRFmM3IqRW7FFOUROthFj18XK9q4bCv5v_wa6Jnwk</recordid><startdate>20230914</startdate><enddate>20230914</enddate><creator>Becattini, F</creator><creator>Roselli, D</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0001-9956-9114</orcidid></search><sort><creationdate>20230914</creationdate><title>Quantum field corrections to the equation of state of freely streaming matter in the Friedman–Lemaître–Robertson–Walker space-time</title><author>Becattini, F ; Roselli, D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c322t-33502d98e43a01e480330fa7e7eff492b10f2adaccd4bf88e0b78a63e27375d43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>cosmological metric</topic><topic>quantum fields in curved spacetime</topic><topic>quantum relativistic statistical mechanics</topic><topic>thermal expectation values</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Becattini, F</creatorcontrib><creatorcontrib>Roselli, D</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><jtitle>Classical and quantum gravity</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Becattini, F</au><au>Roselli, D</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quantum field corrections to the equation of state of freely streaming matter in the Friedman–Lemaître–Robertson–Walker space-time</atitle><jtitle>Classical and quantum gravity</jtitle><stitle>CQG</stitle><addtitle>Class. Quantum Grav</addtitle><date>2023-09-14</date><risdate>2023</risdate><volume>40</volume><issue>17</issue><spage>175007</spage><pages>175007-</pages><issn>0264-9381</issn><eissn>1361-6382</eissn><coden>CQGRDG</coden><abstract>We calculate the energy density and pressure of a scalar field after its decoupling from a thermal bath in the spatially flat Friedman–Lemaître–Robertson–Walker space-time, within the framework of quantum statistical mechanics. By using the density operator determined by the condition of local thermodynamic equilibrium, we calculate the mean value of the stress-energy tensor of a real scalar field by subtracting the vacuum expectation value at the time of the decoupling. The obtained expressions of energy density and pressure involve corrections with respect to the classical free-streaming solution of the relativistic Boltzmann equation, which may become relevant even at long times.</abstract><pub>IOP Publishing</pub><doi>10.1088/1361-6382/ace495</doi><tpages>22</tpages><orcidid>https://orcid.org/0000-0001-9956-9114</orcidid><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier ISSN: 0264-9381
ispartof Classical and quantum gravity, 2023-09, Vol.40 (17), p.175007
issn 0264-9381
1361-6382
language eng
recordid cdi_iop_journals_10_1088_1361_6382_ace495
source IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link
subjects cosmological metric
quantum fields in curved spacetime
quantum relativistic statistical mechanics
thermal expectation values
title Quantum field corrections to the equation of state of freely streaming matter in the Friedman–Lemaître–Robertson–Walker space-time
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-28T04%3A19%3A23IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-iop_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Quantum%20field%20corrections%20to%20the%20equation%20of%20state%20of%20freely%20streaming%20matter%20in%20the%20Friedman%E2%80%93Lema%C3%AEtre%E2%80%93Robertson%E2%80%93Walker%20space-time&rft.jtitle=Classical%20and%20quantum%20gravity&rft.au=Becattini,%20F&rft.date=2023-09-14&rft.volume=40&rft.issue=17&rft.spage=175007&rft.pages=175007-&rft.issn=0264-9381&rft.eissn=1361-6382&rft.coden=CQGRDG&rft_id=info:doi/10.1088/1361-6382/ace495&rft_dat=%3Ciop_cross%3Ecqgace495%3C/iop_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true