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Bose-Einstein condensation of excitons and polaritons

Bose-Einstein condensation of excitons and polaritons

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!<br />

Results at Critical Threshold in Trap<br />

General condition for exchange to be important:<br />

E'<br />

, rs ~ n-1/2 " = h / 2mkBT (in 2D)<br />

& superfluid at low T or high density<br />

trap implies spatial<br />

<strong>condensation</strong><br />

excited thermal particles<br />

x!<br />

log T<br />

normal<br />

log n<br />

superfluid

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