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 title Project leader Project code Project type prema kvantnoj gravitaciji: nekomutativna geometrija, teorija polja i kozmologija-tqgngftc Stjepan Meljanac IP-2014-09-9582 HRZZ Ruđer Bošković Institute: Twinning for a step forward of the Theoretical Physics Division-RBI-T-WINNING Fabrizio NESTI 692194 EK
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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