162543 20251017144558.0 doi 10.1209/0295-5075/aded32 sideral 145122 ART-2025-145122 eng Asorey, Manuel Universidad de Zaragoza (orcid)0000-0003-3669-6241 Matching high and low temperature regimes of massive scalar fields 2025 We analyze the matching of high- and low-temperature expansions of the effective action of massive scalar fields confined between two infinite walls with different boundary conditions. One remarkable effect in the low-temperature regime is the exponential decay of the vacuum energy with the distance of the boundary walls. This exponential decay depends on the boundary conditions. When the conditions involve any kind of interconnection between the boundary values of the fields at the two walls the rate of the exponential decay is half than when the two boundaries are not connected. In particular, this rate for periodic boundary conditions is half of that for Dirichlet boundary conditions. info:eu-repo/grantAgreement/ES/AEI/PID2021-126078NB-C21 info:eu-repo/grantAgreement/ES/DGA-FSE/E21-17R info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/other info:eu-repo/semantics/publishedVersion Ezquerro, Fernando Universidad de Zaragoza 2004 405 Universidad de Zaragoza Dpto. Física Teórica Área Física Teórica 151, 2 (2025), 22001 [6 pp.] Europhys. lett. Europhysics letters 0295-5075 497144 http://zaguan.unizar.es/record/162543/files/texto_completo.pdf Versión publicada 561876 http://zaguan.unizar.es/record/162543/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:162543 articulos driver 2025-10-17-14:13:42 ARTICLE