Sanvitto, D., Marchetti, F. M., Szymanska, M. H. (Marzena H.), Tosi, G., Baudisch, M., Laussy, F. P., Krizhanovskii, D. N., Skolnick, M. S., Marrucci, L., Lemaître, A., Bloch, J. (Jacqueline), Tejedor, C. and Viña, Luis (2010) Persistent currents and quantized vortices in a polariton superfluid. Nature Physics, Vol.6 (No.7). pp. 527-533. doi:10.1038/nphys1668 ISSN 1745-2473.

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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.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Superfluidity, Polaritons
Journal or Publication Title:	Nature Physics
Publisher:	Nature Publishing Group
ISSN:	1745-2473
Official Date:	July 2010
Dates:	Date Event July 2010 Published
Volume:	Vol.6
Number:	No.7
Number of Pages:	7
Page Range:	pp. 527-533
DOI:	10.1038/nphys1668
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	3 December 2015
Date of first compliant Open Access:	3 December 2015
Funder:	Spain. Ministerio de Educación y Ciencia (MEC), Spain. CAM, Spain. Ministerio de Ciencia e Innovación (MICINN)
Grant number:	MAT2008-01555 (MEC), QOIT-CSD2006-00019 (MEC), S2009/ESP-1503 (CAM)

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