%0 Conference Paper %F Oral %T Casimir-Lifshitz Force Out of Thermal Equilibrium and Asymptotic Nonadditivity %+ Laboratoire Kastler Brossel (LKB (Lhomond)) %A Antezza, Mauro %F Invité %< sans comité de lecture %Z L2C:09-098 %B QFEXT’09 : “Quantum Field Theory Under the Influence of External Condition” %C Norman, Oklahoma, United States %8 2009-09-23 %D 2009 %Z Physics [physics]/Quantum Physics [quant-ph] %Z Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas] %Z Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus] %Z Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph] %Z Physics [physics]/Physics [physics]/Optics [physics.optics]Conference papers %X We investigate the force acting between two parallel plates held at different temperatures. The force reproduces, as limiting cases, the well-known Casimir-Lifshitz surface-surface force at thermal equilibrium and the surface-atom force out of thermal equilibrium recently derived by M. Antezza et al., Phys. Rev. Lett. 95, 113202 (2005). The asymptotic behavior of the force at large distances is explicitly discussed. In particular when one of the two bodies is a rarefied gas the force is not additive, being proportional to the square root of the density. Nontrivial crossover regions at large distances are also identified. %G English %L hal-01910108 %U https://hal.science/hal-01910108 %~ ENS-PARIS %~ LKB %~ CNRS %~ ALLINSP %~ PSL %~ SORBONNE-UNIVERSITE %~ SU-INF-2018 %~ SU-SCIENCES %~ ENS-PSL %~ ALLIANCE-SU