One-step implementation of an N-qubit quantum phase gate through a double Raman passage |
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Authors: | Lü Hai-Yan Yu Ya-Fei Zhang Zhi-Ming |
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Institution: | Laboratory of Photonic Information Technology,
SIPSE & LQIT, South China Normal University,
Guangzhou
510006, China |
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Abstract: | We propose a scheme for controllably implementing an
N-qubit phase gate by one step within a ground-state subspace of
N three-state atoms trapped in a cavity through a double Raman
passage. We can extend our scheme to the realisation of an arbitrary
N-qubit phase gate by appropriately adjusting coupling strengths
and detunings between atoms and external driving fields. The
advantage of this one-step scheme is its robustness against
decoherence. |
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Keywords: | Raman-coupled model quantum computation quantum phase
gate |
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