Chebyshev polynomial representation of imaginary-time response functions

Problems of finite-temperature quantum statistical mechanics can be formulated in terms of imaginary (Euclidean) -time Green's functions and self-energies. In the context of realistic Hamiltonians, the large energy scale of the Hamiltonian (as compared to temperature) necessitates a very precis...

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Veröffentlicht in:	Physical review. B 2018-08, Vol.98 (7), p.075127
Hauptverfasser:	Gull, Emanuel, Iskakov, Sergei, Krivenko, Igor, Rusakov, Alexander A, Zgid, Dominika
Format:	Artikel
Sprache:	eng
Schlagworte:	Chebyshev approximation Fourier transforms Green's functions Hamiltonian functions Mathematical analysis Polynomials Quantum statistics Representations Response functions Series expansion Statistical mechanics Thermal expansion Time response
Online-Zugang:	Volltext
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