Quantum entanglement of four distant atoms trapped in different optical cavities

We propose a unified scheme to generate W states, Greenberger-Horne-Zeilinger (GHZ) states, and cluster states of four distant atoms, which are trapped separately in leaky cavities. The proposed schemes require linear optical elements and photon detectors with single-photon sensitivity. The quantum...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2004-05, Vol.69 (5), Article 052314
Main Authors: Zou, XuBo, Pahlke, K., Mathis, W.
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
ATOMS
CORRELATIONS
DETECTION
ENERGY LEVELS
GHZ RANGE
NOISE
PHOTONS
QUANTUM MECHANICS
RADIATION PRESSURE
SENSITIVITY
TRAPPING
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Summary:We propose a unified scheme to generate W states, Greenberger-Horne-Zeilinger (GHZ) states, and cluster states of four distant atoms, which are trapped separately in leaky cavities. The proposed schemes require linear optical elements and photon detectors with single-photon sensitivity. The quantum noise influences the fidelity of the generated states. Further, based on the four-photon coincidence detection, we propose another scheme to generate the W states and GHZ states of four distant atoms. The scheme is insensitive to the quantum noise, but cannot be used to generate the cluster states.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.69.052314