QUROPE Quantum Information Processing and Communication in Europe

CEA has operated the first hybrid structure able to transfer coherently quantum information between a qubit and a spin ensemble. This demonstrated that a spin ensemble can be used as a memory for a SC qubit.

Figure : Hybrid circuit with a transmon qubit and a NV spin ensemble in a diamond crystal coupled to a same resonator. (a) schematic representation; (b) picture; (c) coherent transfer and retrieval of quantum information between the qubit and the NV spin ensemble.