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Pregled bibliografske jedinice broj: 82639

The general-covariant and gauge-invariant theory of quantum particles in classical backgrounds


Nikolić, Hrvoje
The general-covariant and gauge-invariant theory of quantum particles in classical backgrounds // International Journal of Modern Physics D, 12 (2003) (međunarodna recenzija, članak, znanstveni)


Naslov
The general-covariant and gauge-invariant theory of quantum particles in classical backgrounds

Autori
Nikolić, Hrvoje

Izvornik
International Journal of Modern Physics D (0218-2718) 12 (2003);

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Current of particle density; curved background; electromagnetic background; general-covariance; gauge-invariance; particle production

Sažetak
A new approach to the concept of particles and their production in quantum field theory is developed. A local operator describing the current of particle density is constructed for scalar and spinor fields in arbitrary gravitational and electromagnetic backgrounds. This enables one to describe particles in a local, general-covariant and gauge-invariant way. However, the current depends on the choice of a 2-point function. There is a choice that leads to the local non-conservation of the current in a gravitational or an electromagnetic background, which describes local particle production consistent with the usual global description based on the Bogoliubov transformation. The most natural choice based on the Green function calculated using the Schwinger-DeWitt method leads to the local conservation of the current, provided that interactions with quantum fields are absent. Interactions with quantum fields lead to the local non-conservation of the current which describes local particle production consistent with the usual global description based on the interaction picture.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
0098002

Ustanove
Institut "Ruđer Bošković", Zagreb

Autor s matičnim brojem:
Hrvoje Nikolić, (229631)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus