Quantum entanglement between an optical photon and a solid-state spin qubit

TY - JOUR

T1 - Quantum entanglement between an optical photon and a solid-state spin qubit

AU - Togan, E.

AU - Chu, Y.

AU - Trifonov, A. S.

AU - Jiang, L.

AU - Maze, J.

AU - Childress, L.

AU - Dutt, M. V. G.

AU - Sørensen, Anders Søndberg

AU - Hemmer, R.

AU - Zibrov, A. S.

AU - Lukin, M. D.

PY - 2010/8/5

Y1 - 2010/8/5

N2 - Quantum entanglement is among the most fascinating aspects of quantum theory1. Entangled optical photons are now widely used for fundamental tests of quantum mechanics2 and applications such as quantum cryptography1. Several recent experiments demonstrated entanglement of optical photons with trapped ions3, atoms 4,5 and atomic ensembles6-8, which are then used to connect remote long-term memory nodes in distributed quantum networks 9-11. Here we realize quantum entanglement between the polarization of a single optical photon and a solid-state qubit associated with the single electronic spin of a nitrogen vacancy centre in diamond. Our experimental entanglement verification uses the quantum eraser technique5,12, and demonstrates that a high degree of control over interactions between a solid-state qubit and the quantum light field can be achieved. The reported entanglement source can be used in studies of fundamental quantum phenomena and provides a key building block for the solid-state realization of quantum optical networks13,14.

AB - Quantum entanglement is among the most fascinating aspects of quantum theory1. Entangled optical photons are now widely used for fundamental tests of quantum mechanics2 and applications such as quantum cryptography1. Several recent experiments demonstrated entanglement of optical photons with trapped ions3, atoms 4,5 and atomic ensembles6-8, which are then used to connect remote long-term memory nodes in distributed quantum networks 9-11. Here we realize quantum entanglement between the polarization of a single optical photon and a solid-state qubit associated with the single electronic spin of a nitrogen vacancy centre in diamond. Our experimental entanglement verification uses the quantum eraser technique5,12, and demonstrates that a high degree of control over interactions between a solid-state qubit and the quantum light field can be achieved. The reported entanglement source can be used in studies of fundamental quantum phenomena and provides a key building block for the solid-state realization of quantum optical networks13,14.

U2 - 10.1038/nature09256

DO - 10.1038/nature09256

M3 - Journal article

C2 - 20686569

SN - 0028-0836

VL - 466

SP - 730

EP - 734

JO - Nature

JF - Nature

IS - 7307

ER -