Quantum Algorithm, Gaussian Sums, and Topological Invariants

Details Quantum Algorithm, Gaussian Sums, and Topological Invariants Quantum Algorithm, Gaussian Sums, and Topological Invariants

2009-03-10

arxiv.org/abs/0903.1688v1

Physics

Quantum Physics

11 pages

Scientific paper

Certain quantum topological invariants of three manifolds can be written in the form of the Gaussian sum. It is shown that such topological invariants can be approximated efficiently by a quantum computer. The invariants discussed here are obtained as a partition function of the gauge theory on three manifolds with various gauge groups. Our algorithms are applicable to Abelian and finite gauge groups and to some classes of non-Abelian gauge groups. These invariants can be directly estimated by the nuclear magnetic resonance (NMR) technique used for evaluating the Gaussian sum.

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