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• W3104107611 endingPage "057" @default.
• W3104107611 startingPage "057" @default.
• W3104107611 abstract "We introduce a finite dimensional matrix model approximation to the algebra of functions on a disc based on noncommutative geometry. The algebra is a subalgebra of the one characterizing the noncommutative plane with a * product and depends on two parameters N and theta. It is composed of functions which decay exponentially outside a disc. In the limit in which the size of the matrices goes to infinity and the noncommutativity parameter goes to zero the disc becomes sharper. We introduce a Laplacian defined on the whole algebra and calculate its eigenvalues. We also calculate the two--points correlation function for a free massless theory (Green's function). In both cases the agreement with the exact result on the disc is very good already for relatively small matrices. This opens up the possibility for the study of field theories on the disc with nonperturbative methods. The model contains edge states, a fact studied in a similar matrix model independently introduced by Balachandran, Gupta and Kurkcuoglu." @default.
• W3104107611 created "2020-11-23" @default.
• W3104107611 creator A5012995360 @default.
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• W3104107611 creator A5034146774 @default.
• W3104107611 date "2003-08-29" @default.
• W3104107611 modified "2023-10-06" @default.
• W3104107611 title "The fuzzy disc" @default.
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• W3104107611 doi "https://doi.org/10.1088/1126-6708/2003/08/057" @default.
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