2013/03/31 by Paola Zizzi
Physics and Astronomy · #physics.gen-ph #quant-ph
paper · pdf · doi:10.1007/s10773-013-1805-y
21 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:1104.0114
arxiv created 2013/03/31 · arxiv updated 2015/06/15
We consider a classical pure SU(2) gauge theory, and make an ansatz, which separates the space-temporal degrees of freedom from the internal ones. This ansatz is gauge-invariant but not Lorentz invariant. In a limit case of the ansatz, obtained through a contraction map, and corresponding to a vacuum solution, the SU(2) gauge field reduces to an operator, which is the product of the generator of a global U(1) group times a Pauli matrix. We give a geometrical interpretation of the ansatz and of the contraction map in the framework of principal fiber bundles. Then, we identify the internal degrees of freedom of the gauge field with the non-commutative coordinates of the fuzzy sphere in the fundamental representation and obtain a one qubit state.