Universal enhancement of the optical readout fidelity of single electron spins

Details Universal enhancement of the optical readout fidelity of single electron spins Universal enhancement of the optical readout fidelity of single electron spins

2009-09-15

arxiv.org/abs/0909.2783v2

PRB 81, 035205 (2010)

Physics

Quantum Physics

4 pages with 4 figures, 2 pages of additional material, references added, paragraph added in additional material

Scientific paper

10.1103/PhysRevB.81.035205

Precise readout of spin states is crucial for any approach towards physical realization of a spin-based quantum computer and for magnetometry with single spins. Here, we report a new method to strongly improve the optical readout fidelity of electron spin states associated with single nitrogen-vacancy (NV) centers in diamond. The signal-to-noise ratio is enhanced significantly by performing conditional flip-flop processes between the electron spin and the nuclear spin of the NV center's nitrogen atom. The enhanced readout procedure is triggered by a short preparatory pulse sequence. As the nitrogen nuclear spin is intrinsically present in the system, this method is universally applicable to any nitrogen-vacancy center.

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