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Acceleration of quantum algorithms using three-qubit gates

Juha J. Vartiainen·Antti O. Niskanen·Mikio Nakahara·Martti M. Salomaa
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Abstract

Quantum-circuit optimization is essential for any practical realization of quantum computation, in order to beat decoherence. We present a scheme for implementing the final stage in the compilation of quantum circuits, i.e., for finding the actual physical realizations of the individual modules in the quantum-gate library. We find that numerical optimization can be efficiently utilized in order to generate the appropriate control-parameter sequences which produce the desired three-qubit modules within the Josephson charge-qubit model. Our work suggests ways in which one can in fact considerably reduce the number of gates required to implement a given quantum circuit, hence diminishing idle time and significantly accelerating the execution of quantum algorithms.

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Juha J. Vartiainen, Antti O. Niskanen, Mikio Nakahara, Martti M. Salomaa. 2004-03-02. Acceleration of quantum algorithms using three-qubit gates. https://arxiv.org/abs/quant-ph/0310165

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