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SUMMARY:Half Vortices in Exciton Polariton Condensates - Marianne Bauer (T
 CM)
DTSTART:20100528T143000Z
DTEND:20100528T150000Z
UID:TALK24568@talks.cam.ac.uk
CONTACT:Daniel Cole
DESCRIPTION:"Y.G. Rubo\, Phys. Rev. Lett. 99\, 106401 (2007)":http://prl.a
 ps.org/abstract/PRL/v99/i10/e106401\n\nIt is shown that vortices in linear
 ly polarized polariton condensates in planar semiconductor microcavities c
 arry two winding numbers (k\, m). These numbers can be either integer or h
 alf-integer simultaneously. Four half-integer vortices (1/2\, 1/2)\, (-1/2
 \, -1/2)\, (1/2\, -1/2)\, and (-1/2\, 1/2) are anisotropic\, possess the s
 mallest energy\, and define the Kosterlitz-Thouless transition temperature
 . The condensate concentration remains finite within the core of the half 
 vortex and the condensate polarization becomes fully circular in the core 
 center.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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