Qunatum Entanglement between Optical Photon and Solid-State Spin Qubit – Niels Bohr Institute - University of Copenhagen

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Niels Bohr Institute > Calendar > 2009 > Qunatum Entanglement b...

Qunatum Entanglement between Optical Photon and Solid-State Spin Qubit

Nonlocal entanglement is a fundamental phenomenon in quantum mechanics. It has been extensively investigated in systems of optical photons and with isolated ions and atoms. Recently it emerged as a powerful resource for realization of various ap- plications in quantum information science. Here, we demonstrate a non-local entanglement between a single optical photon and a solid-state qubit associated with a single electronic spin of Nitrogen Vacancy impurity in diamond. Our experiment demonstrates a high degree of control over solid state qubits in optical domain and provide a fundamental building block towards realization of quantum optical networks based on long-lived electronic and nuclear spin memory in solid-state.