Mesoscopic Superfluid 3He

Lead Research Organisation: University of Manchester
Department Name: Physics and Astronomy

Abstract

Superfluid 3He is the most ordered and pure condensed matter system, as a result various types of quantized vortices and other defects of its order were observed and studied. When superfluid 3He becomes two-dimensional, new types of vortices are expected. While fundamental on its own, understanding of such vortices paves way to our understanding of unconvensional superconductors and cosmic strings. We will study the vortex physics in superfluid 3He of reduced dimensions. The new research direction can be initiated by using a rare combination of expertise from different research groups in the School of Physics and Astronomy. Golov's group has a long-term experience in studies of superfluid helium and possesses a unique rotating cryostat for creating vortices in superfluid 3He. Geim's group will contribute to the project through its direct access to modern microfabrication facilities and extensive expertise in mesoscopic physics, including the physics of vortices in mesoscopic superconductors. We intend to study quantized vortices in thin slabs of superfluid 3He confined by flat boundaries with artificially fabricated periodic arrays of submicron bumps (pinning centres for vortices). The properties of 3He in thin-slab geometry should differ from those of bulk superfluid in many respects, for example, new type of vortices with circulation equal to just one half of circulation quantum are expected. With our rotating cryostat, we will introduce vortices of required density while keeping the 3He below its superfluid transition temperature of 0.9 mK. With arrays of nanofabricated pinning centres, we expect to observe commensurability effects when densities of the arrays of vortices and pinning centres match. This will provide a direct measure of the vortex density and, among other things, should allow us to find out whether vortices can become fractional under certain experimental conditions.

Publications

10 25 50

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Eltsov VB (2007) Quantum turbulence in a propagating superfluid vortex front. in Physical review letters

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Golov A (2010) Charged Tangles of Quantized Vortices in Superfluid 4He in Journal of Low Temperature Physics

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Walmsley P (2014) Dynamics of quantum turbulence of different spectra. in Proceedings of the National Academy of Sciences of the United States of America

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Walmsley P (2008) Decay of Turbulence Generated by Spin-Down to Rest in Superfluid 4He in Journal of Low Temperature Physics

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Walmsley PM (2007) Dissipation of quantum turbulence in the zero temperature limit. in Physical review letters

 
Description Ultraquantum and rotating turbulences in superfluid helium have been realized. The rates of energy dissipation by quantum turbulence of different spectra were measured for the first time.
Exploitation Route Our measurements of dissipation rates in the T=0 limit make the only benchmark reference for all researchers in the field.
Sectors Aerospace, Defence and Marine,Other

 
Description Our progress in understanding disordered and turbulent superfluid 3He and 4He adds to the general understanding of turbulence and other complex phenomena. As yet, no direct applications of the findings exist, apart from purely theoretical developments.
First Year Of Impact 2008
Sector Other
 
Description Aalto 
Organisation Aalto University
Country Finland 
Sector Academic/University 
PI Contribution Experimental investigation of rotating turbulence in superfluid 4He and 3He
Collaborator Contribution Experimental investigation of rotating turbulence in superfluid 3He
Impact 1. V.B.Eltsov, A.I.Golov, R.deGraaf, R.Hanninen, M.Krusius, V.S.L'vov, and R.E.Solntsev. Phys. Rev. Lett. 99, 265301 (2007). Quantum turbulence in a propagating superfluid vortex front. 2. V.B.Eltsov, R.deGraaf, R.Hänninen, M.Krusius, R.E.Solntsev, V.S.L'vov, A.I.Golov and P.M.Walmsley. Progress in Low Temperature Physics (invited review article, North-Holland, Amsterdam, 2008), Vol. XVI, pp. 45-146. Turbulent Dynamics in Rotating Helium Superfluids 3. P.M. Walmsley, V.B. Eltsov, P.J. Heikkinen, J.J. Hosio, R. Hanninen, M. Krusius. Physical Review B, 84, 184532/1-7 (2011). Turbulent Vortex Flow Responses at the AB Interface in Rotating Superfluid 3He-B.
Start Year 2006
 
Description Cornell University 
Organisation Cornell University
Country United States 
Sector Academic/University 
PI Contribution Experiment and theory
Collaborator Contribution Experiment
Impact 1. G.Lawes, A.I.Golov, E.Nazaretski, N.Mulders, and J.M.Parpia. Phys. Rev. Lett. 90, 195301 - 195301-4 (2003). Sound propagation in co-existent Bose and Fermi superfluids in aerogel. 2. A.I.Golov, D. Einzel, G.Lawes, K. Matsumoto, and J.M.Parpia. Phys. Rev. Lett. 92, 195301-1 - 195301-4 (2004). Dissipation mechanisms near the superfluid 3He transition in aerogel.
 
Description Neel Institut Grenoble 
Organisation NEEL Institute
Country France 
Sector Public 
PI Contribution Experimental and theoretical investigations of the dynamics of quantized vortices and their tangles in superfluid 3He
Collaborator Contribution Experimental and theoretical investigations of the dynamics of quantized vortices and their tangles in superfluid 3He
Impact Yury M. Bunkov, Andrei I. Golov, Victor S. L'vov, Anna Pomyalov, and Itamar Procaccia. Phys. Rev. B 90, 024508 (2014); DOI: http://dx.doi.org/10.1103/PhysRevB.90.024508 Evolution of a neutron-initiated micro big bang in superfluid 3He-B.
Start Year 2006
 
Description Weizmann 
Organisation Weizmann Institute of Science
Country Israel 
Sector Academic/University 
PI Contribution Experimental and theoretical investigations of the dynamics of vortex tangles in superfluid helium
Collaborator Contribution Ttheoretical investigations of the dynamics of vortex tangles in superfluid helium
Impact 1. V.B.Eltsov, A.I.Golov, R.deGraaf, R.Hanninen, M.Krusius, V.S.L'vov, and R.E.Solntsev. Phys. Rev. Lett. 99, 265301 (2007). Quantum turbulence in a propagating superfluid vortex front. 2. V.B.Eltsov, R.deGraaf, R.Hänninen, M.Krusius, R.E.Solntsev, V.S.L'vov, A.I.Golov and P.M.Walmsley. Progress in Low Temperature Physics (invited review article, North-Holland, Amsterdam, 2008), Vol. XVI, pp. 45-146. Turbulent Dynamics in Rotating Helium Superfluids 3. Yury M. Bunkov, Andrei I. Golov, Victor S. L'vov, Anna Pomyalov, and Itamar Procaccia. Phys. Rev. B 90, 024508 (2014); DOI: http://dx.doi.org/10.1103/PhysRevB.90.024508 Evolution of a neutron-initiated micro big bang in superfluid 3He-B.
Start Year 2007