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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Bose condensation of exciton polaritons

Bose condensation of exciton polaritons

Kasprzak, Jacek

Paperback

Physics

ISBN10: 3639215419
ISBN13: 9783639215410
Publisher: Blues Kids Of Amer
Published: Aug 13 2010
Pages: 176
Weight: 0.59
Height: 0.41 Width: 6.00 Depth: 9.00
Language: English
Because of their unique property of bringing pure quantum effects into the real world scale, phase transitions towards condensed phases have always fascinated scientists. Bose-Einstein condensation (BEC), appearing upon cooling a gas of bosons below a critical temperature, has been given a striking demonstration in dilute atomic gases at temperatures below 200nK. By confining photons in a semiconductor microcavity, and strongly coupling them to electronic excitations, one may create polaritons. These bosonic quasi-particles are billion times lighter than rubidium atoms, thus theoretically allowing a BEC at standard cryogenic temperatures. Here we present experiments giving compelling evidence for a BEC of polaritons. Above a critical density, we observe massive occupation of the ground state, developing from a thermalized distribution of the polariton population at (16-20) K. The spontaneopus onset of a coherent state is manifested by the increase of temporal coherence, build-up of spatial long-range order and the reduction of the thermal noise observed in second order coherence experiments. All of these indicate spontaneous onset of a macroscopic quantum phase.

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