Single-shot readout of multiple nuclear spin qubits in diamond under ambient conditions

Abstract

We use the electronic spin of a single Nitrogen-Vacancy (NV) defect in diamond to observe the real-time evolution of neighboring single nuclear spins under ambient conditions. Using a diamond sample with a natural abundance of ${}^{13}$C isotopes, we first demonstrate high fidelity initialization and single-shot readout of an individual ${}^{13}$C nuclear spin. By including the intrinsic ${}^{14}$N nuclear spin of the NV defect in the quantum register, we then report the simultaneous observation of quantum jumps linked to both nuclear spin species, providing an efficient initialization of the two qubits. These results open up new avenues for diamond-based quantum information processing including active feedback in quantum error correction protocols and tests of quantum correlations with solid-state single spins at room temperature.

11 pages including supplementary information. Bibliography corrected

References in corpus (8)

• Quantum Computing
• High-sensitivity diamond magnetometer with nanoscale resolution
• High-fidelity projective readout of a solid-state spin quantum register
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• Decoherence-protected quantum gates for a hybrid solid-state spin register
• Coherence of single spins coupled to a nuclear spin bath of varying density
• Excited-state spectroscopy using single-spin manipulation in diamond
• Demonstration of entanglement-by-measurement of solid state qubits

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