Realization of Arbitrary Gates in Holonomic Quantum Computation

Details Realization of Arbitrary Gates in Holonomic Quantum Computation Realization of Arbitrary Gates in Holonomic Quantum Computation

2002-09-02

arxiv.org/abs/quant-ph/0209015v1

Physics

Quantum Physics

8 pages, 6 figures

Scientific paper

10.1103/PhysRevA.67.012319

Among the many proposals for the realization of a quantum computer, holonomic quantum computation (HQC) is distinguished from the rest in that it is geometrical in nature and thus expected to be robust against decoherence. Here we analyze the realization of various quantum gates by solving the inverse problem: Given a unitary matrix, we develop a formalism by which we find loops in the parameter space generating this matrix as a holonomy. We demonstrate for the first time that such a one-qubit gate as the Hadamard gate and such two-qubit gates as the CNOT gate, the SWAP gate and the discrete Fourier transformation can be obtained with a single loop.

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