Publication

Collective excitation kinetics in the condensation of polaritons

Vincenzo Savona
2006
Conference Papers

Abstract

We develop a kinetic model for polariton condensation, in which the field dynamics of collective excitations is treated self-consistently during the condensation kinetics. This model allows to account properly for the quantum fluctuations of the condensate. Using realistic parameters, we prove that long-wavelength excitations considerably deplete the condensate just above threshold. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Official source

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Vincenzo Savona
2006
Conference Papers

Abstract

Official source

Related concepts (12)

Quasiparticle

In physics, quasiparticles and collective excitations are closely related phenomena arising when a microscopically complicated system such as a solid behaves as if it contained different weakly interacting particles in vacuum. For example, as an electron travels through a semiconductor, its motion is disturbed in a complex way by its interactions with other electrons and with atomic nuclei. The electron behaves as though it has a different effective mass travelling unperturbed in vacuum.

Exciton-polariton

In physics the Exciton–polariton is a type of polariton; a hybrid light and matter quasiparticle arising from the strong coupling of the electromagnetic dipolar oscillations of excitons (either in bulk or quantum wells) and photons. Because light excitations are observed classically as photons, which are massless particles, they do not therefore have mass, like a physical particle. This property makes them a quasiparticle.

Quantum fluctuation

In quantum physics, a quantum fluctuation (also known as a vacuum state fluctuation or vacuum fluctuation) is the temporary random change in the amount of energy in a point in space, as prescribed by Werner Heisenberg's uncertainty principle. They are minute random fluctuations in the values of the fields which represent elementary particles, such as electric and magnetic fields which represent the electromagnetic force carried by photons, W and Z fields which carry the weak force, and gluon fields which carry the strong force.