Boundary conditions and critical Casimir forces in helium

R. Garcia; M. H.W. Chan

doi:10.1016/S0921-4526(02)01975-0

Boundary conditions and critical Casimir forces in helium

R. Garcia
, M. H.W. Chan

Research output: Contribution to journal › Conference article › peer-review

Abstract

If a fluid near its critical point is confined between two interfaces, the long-ranged critical fluctuations in the order parameter will mediate a force. This force, known as the critical Casimir force, is a direct analog of the Casimir force in electromagnetism. Dielectric constant measurements of helium films adsorbed on Cu electrodes provide evidence for the existence of the critical Casimir force near the superfluid transition in ⁴He and near the tricritical point in ³He-⁴He mixtures. In pure ⁴He, we find the force is attractive but near the tricritical point the force appears repulsive, a change due to the extraordinary boundary conditions at the tricritical point.

Original language	English (US)
Pages (from-to)	238-241
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	329-333
DOIs	https://doi.org/10.1016/S0921-4526(02)01975-0
State	Published - May 2003
Event	Proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: Aug 20 2002 → Aug 27 2002

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(02)01975-0

Cite this

@article{09e845f4a18946d29daa3d13e0e076fa,

title = "Boundary conditions and critical Casimir forces in helium",

abstract = "If a fluid near its critical point is confined between two interfaces, the long-ranged critical fluctuations in the order parameter will mediate a force. This force, known as the critical Casimir force, is a direct analog of the Casimir force in electromagnetism. Dielectric constant measurements of helium films adsorbed on Cu electrodes provide evidence for the existence of the critical Casimir force near the superfluid transition in 4He and near the tricritical point in 3He-4He mixtures. In pure 4He, we find the force is attractive but near the tricritical point the force appears repulsive, a change due to the extraordinary boundary conditions at the tricritical point.",

author = "R. Garcia and Chan, \{M. H.W.\}",

note = "Funding Information: We thank H. Meyer for providing unpublished pressure data used in some of our calculations. We thank M. Krech and G. Williams for providing their calculations of ϑ ahead of publication. We also thank M. Cole, K. Knorr, and N. Mulders for informative discussions. This work was supported by NASA's Office of Biological and Physical Research under NAG8-1761. ; Proceedings of the 23rd international conference on low temper ; Conference date: 20-08-2002 Through 27-08-2002",

year = "2003",

month = may,

doi = "10.1016/S0921-4526(02)01975-0",

language = "English (US)",

volume = "329-333",

pages = "238--241",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Boundary conditions and critical Casimir forces in helium

AU - Garcia, R.

AU - Chan, M. H.W.

N1 - Funding Information: We thank H. Meyer for providing unpublished pressure data used in some of our calculations. We thank M. Krech and G. Williams for providing their calculations of ϑ ahead of publication. We also thank M. Cole, K. Knorr, and N. Mulders for informative discussions. This work was supported by NASA's Office of Biological and Physical Research under NAG8-1761.

PY - 2003/5

Y1 - 2003/5

N2 - If a fluid near its critical point is confined between two interfaces, the long-ranged critical fluctuations in the order parameter will mediate a force. This force, known as the critical Casimir force, is a direct analog of the Casimir force in electromagnetism. Dielectric constant measurements of helium films adsorbed on Cu electrodes provide evidence for the existence of the critical Casimir force near the superfluid transition in 4He and near the tricritical point in 3He-4He mixtures. In pure 4He, we find the force is attractive but near the tricritical point the force appears repulsive, a change due to the extraordinary boundary conditions at the tricritical point.

AB - If a fluid near its critical point is confined between two interfaces, the long-ranged critical fluctuations in the order parameter will mediate a force. This force, known as the critical Casimir force, is a direct analog of the Casimir force in electromagnetism. Dielectric constant measurements of helium films adsorbed on Cu electrodes provide evidence for the existence of the critical Casimir force near the superfluid transition in 4He and near the tricritical point in 3He-4He mixtures. In pure 4He, we find the force is attractive but near the tricritical point the force appears repulsive, a change due to the extraordinary boundary conditions at the tricritical point.

UR - https://www.scopus.com/pages/publications/17344392968

UR - https://www.scopus.com/pages/publications/17344392968#tab=citedBy

U2 - 10.1016/S0921-4526(02)01975-0

DO - 10.1016/S0921-4526(02)01975-0

M3 - Conference article

AN - SCOPUS:17344392968

SN - 0921-4526

VL - 329-333

SP - 238

EP - 241

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - Proceedings of the 23rd international conference on low temper

Y2 - 20 August 2002 through 27 August 2002

ER -

Boundary conditions and critical Casimir forces in helium

Abstract

All Science Journal Classification (ASJC) codes

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