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Vacuum energy from noncommutative models

Mignemi, Salvatore; Samsarov, Anđelo (2018) Vacuum energy from noncommutative models. Physics letters. B, 779 . pp. 244-248. ISSN 0370-2693

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Abstract

The vacuum energy is computed for a scalar field in a noncommutative background in several models of noncommutative geometry. One may expect that the noncommutativity introduces a natural cutoff on the ultraviolet divergences of field theory. Our calculations show however that this depends on the particular model considered: in some cases the divergences are suppressed and the vacuum energy is only logarithmically divergent, in other cases they are stronger than in the commutative theory.

Item Type: Article
Uncontrolled Keywords: vacuum energy, cosmological constant, heat kernel, noncommutative models
Subjects: NATURAL SCIENCES > Physics
Divisions: Theoretical Physics Division
Projects:
Project titleProject leaderProject codeProject type
prema kvantnoj gravitaciji: nekomutativna geometrija, teorija polja i kozmologija-tqgngftcStjepan MeljanacIP-2014-09-9582HRZZ
Ruđer Bošković Institute: Twinning for a step forward of the Theoretical Physics Division-RBI-T-WINNINGFabrizio NESTI692194EK
Depositing User: Anđelo Samsarov
Date Deposited: 05 Jul 2019 11:29
URI: http://fulir.irb.hr/id/eprint/4662
DOI: 10.1016/j.physletb.2018.02.016

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