Nonlinear Dynamics and Applications

2006, Vol.13, pp.54-60

An expansion in series over projective operators for propagator of quasiparticle excitation in electronic system of crystal.
H.V. Grushevskaya

A technique of projective operators which allows to offer a strict procedure of construction of Green function in quantum calculations of crystals has been developed. It was shown that a propagator of quasiparticle excitation in crystal can be represented as an expansion in series over projective operators.
Key words: projective operator, Green function, band structure

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