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Measurement of the temperature dependence of the Casimir-Polder force (Articolo in rivista)

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Measurement of the temperature dependence of the Casimir-Polder force (Articolo in rivista) (literal)

Anno

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Alternative label

Obrecht, JM; Wild, RJ; Antezza, M; Pitaevskii, LP; Stringari, S; Cornell, EA (2007)
Measurement of the temperature dependence of the Casimir-Polder force
in Physical review letters (Print)
(literal)

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Obrecht, JM; Wild, RJ; Antezza, M; Pitaevskii, LP; Stringari, S; Cornell, EA (literal)

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Rivista

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Natl Inst Stand & Technol, Joint Inst Lab Astrophys, Boulder, CO 80309 USA; Univ Colorado, Dept Phys, Boulder, CO 80309 USA; Univ Trent, Dipartimento Fis, I-38050 Trento, Italy; CNR INFM BEC Ctr, I-38050 Trento, Italy; PL Kapitsa Phys Problems Inst, Moscow 119334, Russia (literal)

Titolo

Abstract

We report on the first measurement of a temperature dependence of the Casimir-Polder force. This measurement was obtained by positioning a nearly pure Rb-87 Bose-Einstein condensate a few microns from a dielectric substrate and exciting its dipole oscillation. Changes in the collective oscillation frequency of the magnetically trapped atoms result from spatial variations in the surface-atom force. In our experiment, the dielectric substrate is heated up to 605 K, while the surrounding environment is kept near room temperature (310 K). The effect of the Casimir-Polder force is measured to be nearly 3 times larger for a 605 K substrate than for a room-temperature substrate, showing a clear temperature dependence in agreement with theory. (literal)

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