Retardation turns the van der Waals attraction into a Casimir repulsion as close as 3 nm

Mathias Boström; Bo E. Sernelius; Iver Brevik; Barry W. Ninham

doi:10.1103/PhysRevA.85.010701

Retardation turns the van der Waals attraction into a Casimir repulsion as close as 3 nm

Mathias Boström^*, Bo E. Sernelius, Iver Brevik, Barry W. Ninham

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Casimir forces between surfaces immersed in bromobenzene have recently been measured by Munday. Attractive Casimir forces were found between gold surfaces. The forces were repulsive between gold and silica surfaces. We show the repulsion is due to retardation effects. The van der Waals interaction is attractive at all separations. The retardation-driven repulsion sets in at around 3 nm. To our knowledge, retardation effects have never been found at such a small distance before. Retardation effects are usually associated with large distances.

Original language	English
Article number	010701
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	85
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.85.010701
Publication status	Published - 10 Jan 2012

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abstract = "Casimir forces between surfaces immersed in bromobenzene have recently been measured by Munday. Attractive Casimir forces were found between gold surfaces. The forces were repulsive between gold and silica surfaces. We show the repulsion is due to retardation effects. The van der Waals interaction is attractive at all separations. The retardation-driven repulsion sets in at around 3 nm. To our knowledge, retardation effects have never been found at such a small distance before. Retardation effects are usually associated with large distances.",

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AU - Ninham, Barry W.

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N2 - Casimir forces between surfaces immersed in bromobenzene have recently been measured by Munday. Attractive Casimir forces were found between gold surfaces. The forces were repulsive between gold and silica surfaces. We show the repulsion is due to retardation effects. The van der Waals interaction is attractive at all separations. The retardation-driven repulsion sets in at around 3 nm. To our knowledge, retardation effects have never been found at such a small distance before. Retardation effects are usually associated with large distances.

AB - Casimir forces between surfaces immersed in bromobenzene have recently been measured by Munday. Attractive Casimir forces were found between gold surfaces. The forces were repulsive between gold and silica surfaces. We show the repulsion is due to retardation effects. The van der Waals interaction is attractive at all separations. The retardation-driven repulsion sets in at around 3 nm. To our knowledge, retardation effects have never been found at such a small distance before. Retardation effects are usually associated with large distances.

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Retardation turns the van der Waals attraction into a Casimir repulsion as close as 3 nm

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