Spin decoherence and electron spin bath noise of a nitrogen-vacancy center in diamond

Article

关键词: SPECTRAL DIFFUSION;    COHERENT DYNAMICS;    COUPLED ELECTRON;    QUANTUM;    RESONANCE;    QUBITS;    DECAY;    TIMES;   

DOI  :  10.1103/PhysRevB.87.115122

来源: SCIE

【 摘 要 】

We theoretically investigate spin decoherence of a single nitrogen-vacancy (NV) center in diamond. Using the spin coherent-state P-representation method, we simulate coherence evolution of the NV center coupled to surrounding nitrogen electron (N) spins. In the system, the strength of N-N coupling is the same order as that of NV-N coupling (the strong intrabath coupling regime). We find that spin decoherence time as well as free-induction decay of the NV center depend on the spatial configuration of N spins. Both the spin decoherence rate (1/T-2) and dephasing rate (1/T-2*) of the NV center increase linearly with the concentration of the N spins. Using the P-representation method, we also demonstrate extracting the noise spectrum of the N spin bath. The capability to calculate the noise spectrum will provide promising pathways to suppress decoherence of spin systems in the strong intrabath coupling regime. DOI: 10.1103/PhysRevB.87.115122

【 授权许可】

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