Functional renormalization group: truncation schemes and quantum tunneling

Weyrauch, Michael

doi:https://doi.org/10.1016/j.molliq.2006.03.005

Zugriffsnummer	19260
Dokumenttyp	Zeitschriftenartikel
Sprache	Englisch
Titel	Functional renormalization group: truncation schemes and quantum tunneling
Autor(in); Institution	Weyrauch, Michael; Q.2, Theoretische Grundlagen, PTB-Braunschweig
Quelle/Jahr	Journal of Molecular Liquids: 127 (2006), 1-3, 21 - 27
ISSN	0167-7322
DOI	https://doi.org/10.1016/j.molliq.2006.03.005
Verlag	Amsterdam: Elsevier
Freie Schlagworte	renormalization ; truncation ; quantum tunneling
Zusammenfassung	A functional renormalization group approach is applied to a single quantum particle. This simple setting allows the quantitative study of various schemes which are used to truncate the functional differential equation describing the renormalization flow of the effective average action. We conclude that an expansion into vertex functions truncated at low order is inappropriate for a system with tunneling.

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Weyrauch, M. (2006). Functional renormalization group: truncation schemes and quantum tunneling. Journal of Molecular Liquids, 127(1-3), 21–27. https://doi.org/10.1016/j.molliq.2006.03.005

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