Verification of the Lifshitz Theory of the van der Waals Potential Using Liquid-Helium Films

Sabisky, E. S.; Anderson, Charles H.

doi:10.1103/physreva.7.790

Cited by 345 publications

(146 citation statements)

References 40 publications

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“…1 stems from the fact that according to the Lifshitz theory of dispersion forces, the adsorption energy should scale as the inverse third power of the film thickness [4,5]. This holds for the film thicknesses to be discussed here, for which retardation effects can be safely neglected [5,6]. Deviations from FHH theory are to be expected only when the temperature is close to the critical point of the adsorbing substance, such that the width of the free film surface may be comparable to the film thickness.…”

Section: Bdmentioning

confidence: 99%

Adsorption Isotherms of Hydrogen: The Role of Thermal Fluctuations

2001

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It is shown that experimentally obtained isotherms of adsorption on solid substrates may be completely reconciled with Lifshitz theory when thermal fluctuations are taken into account. This is achieved within the framework of a solid-on-solid model which is solved numerically. Analysis of the fluctuation contributions observed for hydrogen adsorption onto gold substrates allows to determine the surface tension of the free hydrogen film as a function of film thickness. It is found to decrease sharply for film thicknesses below seven atomic layers.Comment: RevTeX manuscript (3 pages output), 3 figure

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Section: Bdmentioning

confidence: 99%

Adsorption Isotherms of Hydrogen: The Role of Thermal Fluctuations

2001

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“…The experiments on van der Waals forces with liquid He films [267] are outside the confines of this review on retarded forces and accordingly will not be dealt in detail. Mention should also be made of the identification of van der Waals forces with micron sized polystyrene spheres, using a tapping mode Atomic Force Microscope [268].…”

Section: General Requirements For the Casimir Force Measurementsmentioning

confidence: 99%

New developments in the Casimir effect

2001

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We provide a review of both new experimental and theoretical developments in the Casimir effect. The Casimir effect results from the alteration by the boundaries of the zero-point electromagnetic energy. Unique to the Casimir force is its strong dependence on shape, switching from attractive to repulsive as function of the size, geometry and topology of the boundary. Thus the Casimir force is a direct manifestation of the boundary dependence of quantum vacuum. We discuss in depth the general structure of the infinities in the field theory which are removed by a combination of zeta-functional regularization and heat kernel expansion. Different representations for the regularized vacuum energy are given. The Casimir energies and forces in a number of configurations of interest to applications are calculated. We stress the development of the Casimir force for real media including effects of nonzero temperature, finite conductivity of the boundary metal and surface roughness. Also the combined effect of these important factors is investigated in detail on the basis of condensed matter physics and quantum field theory at nonzero temperature. The experiments on measuring the Casimir force are also reviewed, starting first with the older measurements and finishing with a detailed presentation of modern precision experiments. The latter are accurately compared with the theoretical results for real media. At the end of the review we provide the most recent constraints on the corrections to Newtonian gravitational law and other hypothetical long-range interactions at submillimeter range obtained from the Casimir force measurements.

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“…In any case, the effect of this density change is also included in the phenomenological description.) Indeed, the spectacular agreement between the the Lifshitz theory of parallel dielectrics [22], rederived in [21], and the beautiful experiment of Sabisky and Anderson [23] seems strong vindication of this subtraction procedure.…”

Section: Definition Of the Casimir Energymentioning

confidence: 99%

Observability of the bulk Casimir effect: Can the dynamical Casimir effect be relevant to sonoluminescence?

1998

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The experimental observation of intense light emission by acoustically driven, periodically collapsing bubbles of air in water (sonoluminescence) has yet to receive an adequate explanation. One of the most intriguing ideas is that the conversion of acoustic energy into photons occurs quantum mechanically, through a dynamical version of the Casimir effect. We have argued elsewhere that in the adiabatic approximation, which should be reliable here, Casimir or zero-point energies cannot possibly be large enough to be relevant. (About 10 MeV of energy is released per collapse.) However, there are sufficient subtleties involved that others have come to opposite conclusions. In particular, it has been suggested that bulk energy, that is, simply the naive sum of 1 2h ω, which is proportional to the volume, could be relevant. We show that this cannot be the case, based on general principles as well as specific calculations. In the process we further illuminate some of the divergence difficulties that plague Casimir calculations, with an example relevant to the bag model of hadrons.

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Verification of the Lifshitz Theory of the van der Waals Potential Using Liquid-Helium Films

Cited by 345 publications

References 40 publications

Adsorption Isotherms of Hydrogen: The Role of Thermal Fluctuations

Adsorption Isotherms of Hydrogen: The Role of Thermal Fluctuations

New developments in the Casimir effect

Observability of the bulk Casimir effect: Can the dynamical Casimir effect be relevant to sonoluminescence?

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