Quantum reflection of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>He</mml:mi><mml:mo>*</mml:mo></mml:msup></mml:mrow></mml:math>on silicon

Oberst, H.; Tashiro, Yoshihisa; Shimizu, Kazuko; Shimizu, Fujio

doi:10.1103/physreva.71.052901

Cited by 94 publications

(75 citation statements)

References 34 publications

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“…Using the same atomic source geometry, the authors demonstrated somewhat higher reflectivities at 1 mm/s incident velocity and much higher reflectivity at 30 mm/s. The group later experimented with reflection of He* from a flat silicon surface (Oberst et al, 2005). The lowest incident normal velocity was higher in this case (30 mm/s), but at this velocity a reflectivity above 10% was nevertheless observed.…”

Section: Other Experiments Using Cold Metastable Noble Gasesmentioning

confidence: 82%

Cold and trapped metastable noble gases

et al. 2012

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We review experimental work on cold, trapped metastable noble gases. We emphasize the aspects which distinguish work with these atoms from the large body of work on cold, trapped atoms in general. These aspects include detection techniques and collision processes unique to metastable atoms. We describe several experiments exploiting these unique features in fields including atom optics and statistical physics. We also discuss precision measurements on these atoms including fine structure splittings, isotope shifts, and atomic lifetimes.

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Section: Other Experiments Using Cold Metastable Noble Gasesmentioning

confidence: 82%

Cold and trapped metastable noble gases

et al. 2012

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“…Theoretically, calculations of the Casimir-Polder forces between various atoms and plates made of different materials were performed [11][12][13][14] on the basis of the Lifshitz theory. The results obtained were compared [15] with those calculated using a simple phenomenological potential [8,16,17]. charged flat sheet, carring a homogeneous fluid with some mass and negative charge densities.…”

Section: Introductionmentioning

confidence: 99%

Thermal Casimir-Polder interaction of different atoms with graphene

et al. 2012

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The thermal correction to the energy of Casimir-Polder interaction of atoms with a suspended graphene membrane described by the Dirac model is investigated. We show that a major impact on the thermal correction is made by the size of the gap in the energy spectrum of graphene quasiparticles. Specifically, if the temperature is much smaller than the gap parameter (alternatively, larger or of the order of the gap parameter), the thermal correction is shown to be relatively small (alternatively, large). We have calculated the free energy of the thermal Casimir-Polder interaction of atoms of He * , Na, Rb, and Cs with graphene described by both the hydrodynamic and Dirac models. It is shown that in exact computations using the Dirac model, one should use the polarization operator at nonzero temperature. The computational results for the Casimir-Polder free energy obtained in the framework of hydrodynamic model of graphene are several times larger than in the Dirac model within the separation region below 2 µm. We conclude that the theoretical predictions following from the two models can be reliably discriminated in experiments on quantum reflection of different atoms on graphene.

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“…A number of experiments followed that used ultracold atoms to detect the presence of the Casimir-Polder force [4,5,6,7,8,9]; however, none have approached the sensitivity at large distances required to detect a crossover to the thermal regime.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the Casimir-Polder force through center-of-mass oscillations of a Bose-Einstein condensate

et al. 2005

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We have performed a measurement of the Casimir-Polder force using a magnetically trapped 87 Rb Bose-Einstein condensate. By detecting perturbations of the frequency of center-of-mass oscillations of the condensate perpendicular to the surface, we are able to detect this force at a distance ∼5 µm, significantly farther than has been previously achieved, and at a precision approaching that needed to detect the modification due to thermal radiation. Additionally, this technique provides a limit for the presence of non-Newtonian gravity forces in the ∼1 µm range.

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Quantum reflection ofHe*on silicon

Cited by 94 publications

References 34 publications

Cold and trapped metastable noble gases

Cold and trapped metastable noble gases

Thermal Casimir-Polder interaction of different atoms with graphene

Measurement of the Casimir-Polder force through center-of-mass oscillations of a Bose-Einstein condensate

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