quasi-particle lifetime

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• Quasiparticle — In physics, quasiparticles (and related collective excitations) are emergent phenomena that occur when a microscopically complicated system such as a solid behaves as if it contained different (fictitious) weakly interacting particles in free… …   Wikipedia

• Self-energy — In theoretical physics and quantum field theory a particle s self energy Σ represents the contribution to the particle s energy, or effective mass, due to interactions between the particle and the system it is part of. For example, in… …   Wikipedia

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• Fermi liquid — is a generic term for a quantum mechanical liquid of fermions that arises under certain physical conditions when the temperature is sufficiently low. The interaction between the particles of the many body system does not need to be small (see e.g …   Wikipedia

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