Download Bose-Einstein Condensation of Excitons and Biexcitons: And by S. A. Moskalenko, D. W. Snoke PDF

By S. A. Moskalenko, D. W. Snoke

Bose-Einstein condensation of excitons is a distinct impact during which the digital states of an effective can self-organize to procure quantum part coherence. The phenomenon is heavily associated with Bose-Einstein condensation in different structures corresponding to liquid helium and laser-cooled atomic gases. overlaying theoretical features in addition to fresh experimental paintings, the publication presents a complete survey of the sector. After introducing the proper uncomplicated physics of excitons, the authors talk about exciton-phonon interactions in addition to the habit of biexcitons. additionally they disguise exciton phase-transitions and provides specific awareness to nonlinear optical results together with the optical Stark influence and chaos in excitonic structures. The thermodynamics of equilibrium, quasiequilibrium, and nonequilibrium platforms are tested intimately. all through, the authors interweave theoretical and experimental effects. The e-book could be of serious curiosity to graduate scholars and researchers in semiconductor and superconductor physics, quantum optics, and atomic physics.

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Additional info for Bose-Einstein Condensation of Excitons and Biexcitons: And Coherent Nonlinear Optics with Excitons

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The calculation of this correlation function in the general case of an interacting exciton gas requires the techniques of many-body theory. For a quasi-equilibrium gas, one uses the grand canonical Heisenberg SXff iJV)r representation ak(t) = e(i/h)(H~^N)take~(i/ "' , and defines a thermal average over all possible initial states to obtain the correlation function C(k, co) = {Q(k, co)) = Z" 1 J^ . 31) i where Z is the grand canonical partition function, p = l/kBT, and \x is the chemical potential.

Classically, there is little to cause a difference in the kinetic-energy distributions of the spin components, even when the gas is not in equilibrium. The exciton-phonon-scattering rates are known for both the paraexcitons [42] and the orthoexcitons [28], and if there is any difference, it is that the orthoexcitons should cool faster than the paraexcitons by means of phonon emission. Second, the interactions of the excitons can be determined by means of the homogeneous broadening of the luminescence, seen on the low-energy side of the spectra.

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