Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 31, Issue 4, Pages 697-703Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.31.000697
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Funding
- Fundamental Research Funds for the Central Universities [11QNJJ009, 12SSXM001]
- National Natural Science Foundation of China [11204028, 11175044, 11074079]
- National Research Foundation
- Ministry of Education, Singapore [WBS: R-710-000-008-271]
- Government of China through CSC
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We present two efficient methods for implementing the Fredkin gate with atoms separately trapped in an array of three high-Q coupled cavities. The first proposal is based on the resonant dynamics, which leads to a fast resonant interaction in a certain subspace while leaving others unchanged, and the second one utilizes a dispersive interaction such that an effective long-distance dipole-dipole interaction between two distributed target qubits is achieved by a virtually excited process. Both schemes can achieve the standard form of the Fredkin gate in a single step without any subsequent single-qubit operation. The effects of decoherence on the performance of the gate are also analyzed in virtue of the master equation, and strictly numerical simulation reveals that the average fidelity of the quantum gate is high. (C) 2014 Optical Society of America
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