Drinfeld twist and general relativity with fuzzy spaces

Kürkçüoğlu, Seçkin and Sämann, Christian (2006) Drinfeld twist and general relativity with fuzzy spaces. Classical and Quantum Gravity, 24 (2). pp. 291-311. ISSN 0264-9381

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Official URL: http://doi.org/10.1088/0264-9381/24/2/003

Abstract

We give a simplified formula for the star product on CP^n_L, which enables us to define a twist element suited for discussing a Drinfeld twist like structure on fuzzy complex projective spaces. The existence of such a twist will have several consequences for field theories on fuzzy spaces, some of which we discuss in the present paper. As expected, we find that the twist of the coproduct is trivial for the generators of isometries on CP^n_L. Furthermore, the twist allows us to define a covariant tensor calculus on CP^n_L from the perspective of the standard embedding of CP^n in at Euclidean space. That is, we find a representation of a truncated subgroup of the diffeomorphisms on CP^n on the algebra of functions on CP^n_L. Using this calculus, we eventually write down an Einstein-Hilbert action on the fuzzy sphere, which is invariant under twisted diffeomorphisms.

Item Type: Article
Divisions: School of Theoretical Physics > Preprints
Date Deposited: 05 Oct 2017 19:31
Last Modified: 16 Jul 2018 10:51
URI: http://dair.dias.ie/id/eprint/176

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