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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, p. 600-636Article 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, p. 600-636
Keyword [en]
Quantum-statistical response problem, Quantum field theory, Phase-space methods
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-32856DOI: 10.1016/j.aop.2008.08.006ISI: 000263849400004Scopus ID: 2-s2.0-60149098846OAI: oai:DiVA.org:kth-32856DiVA, id: diva2:412614
Note
QC 20110426Available from: 2011-04-26 Created: 2011-04-21 Last updated: 2017-12-11Bibliographically approved

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