Entangling unstable optically active matter qubits

Details Entangling unstable optically active matter qubits Entangling unstable optically active matter qubits

2010-09-21

arxiv.org/abs/1009.4171v2

Physics

Quantum Physics

Scientific paper

In distributed quantum computation, small devices composed of a single or a few qubits are networker together to achieve a scalable machine. Typically there is an optically active matter qubit at each node, so that photons are exploited to achieve remote entanglement. However, in many systems the optically active states are unstable or poorly defined. We report a scheme to perform a high-fidelity entanglement operation even given severe instability. The protocol exploits the existence of optically excited states for phase acquisition without actually exciting those states; it functions with or without cavities and does not require number resolving detectors.

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