Numerical evidence for thermally induced monopoles

Peter Wirnsberger; Domagoj Fijan; Roger A. Lightwood; Andela Šarić; Christoph Dellago; Daan Frenkel

doi:10.1073/pnas.1621494114

Numerical evidence for thermally induced monopoles

Peter Wirnsberger
, Domagoj Fijan
, Roger A. Lightwood
, Andela Šarić
, Christoph Dellago
, Daan Frenkel (Korresp. Autor*in)

Computergestützte Physik und Physik der Weichen Materie

Veröffentlichungen: Beitrag in Fachzeitschrift › Artikel › Peer Reviewed

Abstract

Electric charges are conserved. The same would be expected to hold for magnetic charges, yet magnetic monopoles have never been observed. It is therefore surprising that the laws of nonequilibrium thermodynamics, combined with Maxwell's equations, suggest that colloidal particles heated or cooled in certain polar or paramagnetic solvents may behave as if they carry an electric/magnetic charge. Here, we present numerical simulations that show that the field distribution around a pair of such heated/cooled colloidal particles agrees quantitatively with the theoretical predictions for a pair of oppositely charged electric or magnetic monopoles. However, in other respects, the nonequilibrium colloidal particles do not behave as monopoles: They cannot be moved by a homogeneous applied field. The numerical evidence for the monopole-like fields around heated/cooled colloidal particles is crucial because the experimental and numerical determination of forces between such colloidal particles would be complicated by the presence of other effects, such as thermophoresis.

Originalsprache	Englisch
Seiten (von - bis)	4911-4914
Seitenumfang	4
Fachzeitschrift	Proceedings of the National Academy of Sciences of the United States of America (PNAS)
Jahrgang	114
Ausgabenummer	19
DOIs	https://doi.org/10.1073/pnas.1621494114
Publikationsstatus	Veröffentlicht - 9 Mai 2017

Fördermittel

P.W. acknowledges many invaluable discussions with Martin Neumann, Chao Zhang, Michiel Sprik, Aleks Reinhardt, Carl P\u00F6 lking, and Tine Curk. We acknowledge financial support from the Austrian Academy of Sciences through a doctoral (DOC) fellowship (to P.W.), the Austrian Science Fund (FWF) within the Spezialforschungsbereich Vienna Computational Materials Laboratory (Project F41) (C.D.), and the European Union Early Training Network NANOTRANS (Grant 674979 to D. Frenkel). The results presented here have been achieved in part using the Vienna Scientific Cluster.

ÖFOS 2012

103015 Kondensierte Materie
103029 Statistische Physik

Zugriff auf Dokument

10.1073/pnas.1621494114

Andere Dateien und Links

NANOTRANS: TRANSPORT OF SOFT MATTER AT THE NANOSCALE
Likos, C. (Projektleiter*in) & Wildfellner, E. (Projektadministrator*in)
1/03/16 → 29/02/20
Projekt: Forschungsförderung
ViCoM II: Vienna Computational Materials Laboratory
Süss, D. (Co-Projektleiter*in), Kresse, G. (Projektleiter*in), Held, K. (Co-Projektleiter*in), Verstraete, F. (Co-Projektleiter*in), Burgdorfer, J. (Projektleiter*in), Mauser, N. (Co-Projektleiter*in), Blaha, P. (Co-Projektleiter*in), Mohn, P. (Co-Projektleiter*in), Podloucky, R. (Co-Projektleiter*in), Dellago, C. (Co-Projektleiter*in) & Resch, A. (Projektadministrator*in)
1/06/10 → 30/06/19
Projekt: Forschungsförderung

Zitationsweisen

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author = "Peter Wirnsberger and Domagoj Fijan and Lightwood, \{Roger A.\} and Andela {\v S}ari{\'c} and Christoph Dellago and Daan Frenkel",

note = "Funding Information: P.W. acknowledges many invaluable discussions with Martin Neumann, Chao Zhang, Michiel Sprik, Aleks Reinhardt, Carl P{\"o} lking, and Tine Curk. We acknowledge financial support from the Austrian Academy of Sciences through a doctoral (DOC) fellowship (to P.W.), the Austrian Science Fund (FWF) within the Spezialforschungsbereich Vienna Computational Materials Laboratory (Project F41) (C.D.), and the European Union Early Training Network NANOTRANS (Grant 674979 to D. Frenkel). The results presented here have been achieved in part using the Vienna Scientific Cluster.",

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AU - Wirnsberger, Peter

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AU - Dellago, Christoph

AU - Frenkel, Daan

N1 - Funding Information: P.W. acknowledges many invaluable discussions with Martin Neumann, Chao Zhang, Michiel Sprik, Aleks Reinhardt, Carl Pö lking, and Tine Curk. We acknowledge financial support from the Austrian Academy of Sciences through a doctoral (DOC) fellowship (to P.W.), the Austrian Science Fund (FWF) within the Spezialforschungsbereich Vienna Computational Materials Laboratory (Project F41) (C.D.), and the European Union Early Training Network NANOTRANS (Grant 674979 to D. Frenkel). The results presented here have been achieved in part using the Vienna Scientific Cluster.

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N2 - Electric charges are conserved. The same would be expected to hold for magnetic charges, yet magnetic monopoles have never been observed. It is therefore surprising that the laws of nonequilibrium thermodynamics, combined with Maxwell's equations, suggest that colloidal particles heated or cooled in certain polar or paramagnetic solvents may behave as if they carry an electric/magnetic charge. Here, we present numerical simulations that show that the field distribution around a pair of such heated/cooled colloidal particles agrees quantitatively with the theoretical predictions for a pair of oppositely charged electric or magnetic monopoles. However, in other respects, the nonequilibrium colloidal particles do not behave as monopoles: They cannot be moved by a homogeneous applied field. The numerical evidence for the monopole-like fields around heated/cooled colloidal particles is crucial because the experimental and numerical determination of forces between such colloidal particles would be complicated by the presence of other effects, such as thermophoresis.

AB - Electric charges are conserved. The same would be expected to hold for magnetic charges, yet magnetic monopoles have never been observed. It is therefore surprising that the laws of nonequilibrium thermodynamics, combined with Maxwell's equations, suggest that colloidal particles heated or cooled in certain polar or paramagnetic solvents may behave as if they carry an electric/magnetic charge. Here, we present numerical simulations that show that the field distribution around a pair of such heated/cooled colloidal particles agrees quantitatively with the theoretical predictions for a pair of oppositely charged electric or magnetic monopoles. However, in other respects, the nonequilibrium colloidal particles do not behave as monopoles: They cannot be moved by a homogeneous applied field. The numerical evidence for the monopole-like fields around heated/cooled colloidal particles is crucial because the experimental and numerical determination of forces between such colloidal particles would be complicated by the presence of other effects, such as thermophoresis.

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KW - monopoles

KW - molecular simulation

KW - colloids

KW - POLAR

KW - nonequilibrium thermodynamics

KW - ORIENTATION

KW - COLLOIDAL SUSPENSIONS

KW - SYSTEMS

KW - POLARIZATION

KW - WATER

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JO - Proceedings of the National Academy of Sciences of the United States of America (PNAS)

JF - Proceedings of the National Academy of Sciences of the United States of America (PNAS)

IS - 19

ER -

Numerical evidence for thermally induced monopoles

Abstract

Fördermittel

ÖFOS 2012

Zugriff auf Dokument

Andere Dateien und Links

Fingerprint

Projekte

NANOTRANS: TRANSPORT OF SOFT MATTER AT THE NANOSCALE

ViCoM II: Vienna Computational Materials Laboratory

Zitationsweisen