Lizzi, Fedele and Vitale, Patrizia (2006) Noncommutative spacetime symmetries: twist versus covariance. [Pubblicazione in rivista scientifica]

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Tipologia del documento:	Pubblicazione in rivista scientifica
Titolo:	Noncommutative spacetime symmetries: twist versus covariance
Autori:	Autore Email Lizzi, Fedele [non definito] Vitale, Patrizia [non definito]
Autore/i:	J. M. Gracia-Bondìa, F. Lizzi, F. Ruiz Ruiz, P. Vitale
Data:	2006
Numero di pagine:	8
Dipartimento:	Scienze fisiche
Numero identificativo:	10.1103/PhysRevD.74.025014
URL ufficiale:	http://link.aps.org/abstract/PRD/v74/e029901
Titolo del periodico:	PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
Data:	2006
Volume:	74
Intervallo di pagine:	025014-025014-8
Numero di pagine:	8
Parole chiave:	spacetime symmetries, noncommutative geometry, quantum field theory
Numero identificativo:	10.1103/PhysRevD.74.025014
Depositato il:	20 Ott 2010 08:00
Ultima modifica:	30 Apr 2014 19:41
URI:	http://www.fedoa.unina.it/id/eprint/6249

Abstract

We prove that the Moyal product is covariant under linear affine spacetime transformations. From the covariance law, by introducing an (x, Theta)-space where the spacetime coordinates and the noncommutativity matrix components are on the same footing, we obtain a noncommutative representation of the affine algebra, its generators being differential operators in (x, Theta)-space. As a particular case, theWeyl Lie algebra is studied and known results for Weyl invariant noncommutative field theories are rederived in a nutshell. We also show that this covariance cannot be extended to spacetime transformations generated by differential operators whose coefficients are polynomials of order larger than 1.We compare our approach with the twist-deformed enveloping algebra description of spacetime transformations.

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