Towards optimization of quantum circuits

Details Towards optimization of quantum circuits Towards optimization of quantum circuits

2006-07-18

arxiv.org/abs/quant-ph/0607123v2

Cent. Eur. J. Phys. vol. 6 no.1 p. 128-134 (2008)

Physics

Quantum Physics

10 pages, 11 figures, minor changes+typos

Scientific paper

10.2478/s11534-008-0039-8

Any unitary operation in quantum information processing can be implemented via a sequence of simpler steps - quantum gates. However, actual implementation of a quantum gate is always imperfect and takes a finite time. Therefore, seeking for a short sequence of gates - efficient quantum circuit for a given operation, is an important task. We contribute to this issue by proposing optimization of the well-known universal procedure proposed by Barenco et.al [1]. We also created a computer program which realizes both Barenco's decomposition and the proposed optimization. Furthermore, our optimization can be applied to any quantum circuit containing generalized Toffoli gates, including basic quantum gate circuits.

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