Modularization of multi-qubit controlled phase gate and its NMR implementation

Details Modularization of multi-qubit controlled phase gate and its NMR implementation Modularization of multi-qubit controlled phase gate and its NMR implementation

2004-06-27

arxiv.org/abs/quant-ph/0406209v2

J. Opt. B: Quantum Semiclass. Opt. 7, 22(2005)

Physics

Quantum Physics

to appear in Journal of Optics B: Quantum and Semiclassical Optics

Scientific paper

10.1088/1464-4266/7/1/005

Quantum circuit network is a set of circuits that implements a certain computation task. Being at the center of the quantum circuit network, the multi-qubit controlled phase shift is one of the most important quantum gates. In this paper, we apply the method of modular structuring in classical computer architecture to quantum computer and give a recursive realization of the multi-qubit phase gate. This realization of the controlled phase shift gate is convenient in realizing certain quantum algorithms. We have experimentally implemented this modularized multi-qubit controlled phase gate in a three qubit nuclear magnetic resonance quantum system. The network is demonstrated experimentally using line selective pulses in nuclear magnetic resonance technique. The procedure has the advantage of being simple and easy to implement.

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