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Causal signal transmission by quantum fields. III: Coherent response of fermions
KTH, School of Engineering Sciences (SCI), Physics.
2009 (English)In: Annals of Physics, ISSN 0003-4916, E-ISSN 1096-035X, Vol. 324, no 3, 600-636 p.Article in journal (Refereed) Published
Abstract [en]

Structural response properties of fermionic fields are investigated. in the presence of fermions the key technical concept becomes response combination, or R-normal product, of field operators. It generalises the notion of time-normal operator product to response problems. Time-normal products are a special case of R-normal products without inputs; this paper thus also generalises the concept of time-normal ordering to fermions. Explicit causality of R-normal products of arbitrary (bosonic and/or fermionic) field operators is proven, and explicit relations expressing them by conventional Green's functions of quantum field theory are derived.

Place, publisher, year, edition, pages
2009. Vol. 324, no 3, 600-636 p.
Keyword [en]
Quantum-statistical response problem, Quantum field theory, Phase-space methods
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-32856DOI: 10.1016/j.aop.2008.08.006ISI: 000263849400004ScopusID: 2-s2.0-60149098846OAI: diva2:412614
QC 20110426Available from: 2011-04-26 Created: 2011-04-21 Last updated: 2011-04-26Bibliographically approved

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