Universal enhancement of the optical readout fidelity of single electron spins

Abstract

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.

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

References in corpus (6)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• Coherence of single spins coupled to a nuclear spin bath of varying density
• Excited-state spectroscopy using single-spin manipulation in diamond
• Excited-state spectroscopy of single NV defects in diamond using optically detected magnetic resonance
• Robust control of individual nuclear spins in diamond

Cited by in corpus (94)

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