Quantum mechanics

Diamond

Spin (aerodynamics)

Materials science

Quantum imaging

Photon

Quantum sensor

Thermodynamics

Physics

Quantum entanglement

Nanotechnology

Quantum network

Quantum information science

Quantum technology

Quantum

Composite material

Qubit

Quantum information

Optoelectronics

Open quantum system

Science

Photon-mediated interactions between quantum systems are essential for realizing quantum networks and scalable quantum information processing. We demonstrate such interactions between pairs of silicon-vacancy (SiV) color centers strongly coupled to a diamond nanophotonic cavity. When the optical transitions of the two color centers are tuned into resonance, the coupling to the common cavity mode results in a coherent interaction between them, leading to spectrally-resolved superradiant and subradiant states. We use the electronic spin degrees of freedom of the SiV centers to control these optically-mediated interactions. Our experiments pave the way for implementation of cavity-mediated quantum gates between spin qubits and for realization of scalable quantum network nodes.

Photon-mediated interactions between quantum emitters in a diamond nanocavity