http://www.cnr.it/ontology/cnr/individuo/prodotto/ID179736
Persistent currents and quantized vortices in a polariton superfluid (Articolo in rivista)
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- Persistent currents and quantized vortices in a polariton superfluid (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1038/NPHYS1668 (literal)
- Alternative label
Sanvitto, D; Marchetti, FM; Szymanska, MH; Tosi, G; Baudisch, M; Laussy, FP; Krizhanovskii, DN; Skolnick, MS; Marrucci, L; Lemaitre, A; Bloch, J; Tejedor, C; Vina, L (2010)
Persistent currents and quantized vortices in a polariton superfluid
in Nature physics (Print); NATURE PUBLISHING GROUP,, LONDON (Regno Unito)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Sanvitto, D; Marchetti, FM; Szymanska, MH; Tosi, G; Baudisch, M; Laussy, FP; Krizhanovskii, DN; Skolnick, MS; Marrucci, L; Lemaitre, A; Bloch, J; Tejedor, C; Vina, L (literal)
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- http://www.nature.com/nphys/journal/v6/n7/full/nphys1668.html (literal)
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- ISI Web of Science (WOS) (literal)
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- Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain; Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain; Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England; London Ctr Nanotechnol, London WC1H 0AH, England; Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England; Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England; Univ Naples Federico 2, Dipartimento Sci Fis, I-80126 Naples, Italy; CNR, SPIN, I-80126 Naples, Italy; CNRS, LPN, F-91460 Marcoussis, France (literal)
- Titolo
- Persistent currents and quantized vortices in a polariton superfluid (literal)
- Abstract
- After the discovery of zero viscosity in liquid helium, other fundamental properties of the superfluidity phenomenon have been revealed. One of them, irrotational flow, gives rise to quantized vortices and persistent currents. Those are the landmarks of superfluidity in its modern understanding. Recently, a new variety of dissipationless fluid behaviour has been found in microcavities under the optical parametric regime. Here we report the observation of metastable persistent polariton superflows sustaining a quantized angular momentum, m, after applying a 2-ps laser pulse carrying a vortex state. We observe a transfer of angular momentum to the steady-state condensate, which sustains vorticity for as long as it can be tracked. Furthermore, we study the stability of quantized vortices with m=2. The experiments are analysed using a generalized two-component Gross-Pitaevskii equation. These results demonstrate the control of metastable persistent currents and show the peculiar superfluid character of non-equilibrium polariton condensates. (literal)
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