P B Littlewood et al 2004 J. Phys.: Condens. Matter 16 S3597 doi:10.1088/0953-8984/16/35/003
P B Littlewood1,2, P R Eastham1, J M J Keeling1, F M Marchetti1, B D Simons1 and M H Szymanska1
Show affiliationsThat excitons in solids might condense into a phase-coherent ground state was proposed about 40 years ago, and has been attracting experimental and theoretical attention ever since. Although experimental confirmation has been hard to come by, the concepts released by this phenomenon have been widely influential. This tutorial review discusses general aspects of the theory of exciton and polariton condensates, focusing on the reasons for coherence in the ground state wavefunction, the BCS to Bose crossover(s) for excitons and for polaritons, and the relationship of the coherent condensates to standard lasers.
71.35.-y Excitons and related phenomena
01.30.Rr Surveys and tutorial papers; resource letters
71.36.+c Polaritons (including photon-phonon and photon-magnon interactions)
Issue 35 (8 September 2004)
Received 6 July 2004
Published 20 August 2004
P B Littlewood et al 2004 J. Phys.: Condens. Matter 16 S3597
F M Marchetti and B D Simons 2002 J. Phys. A: Math. Gen. 35 4201
2002 J. Phys. A: Math. Gen. 35
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