1. Scaling of dynamical decoupling for a single electron spin in nanodiamonds at room temperature
- Author
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Yan-Chun Chang, Xin-Yu Pan, Gang-Qin Liu, and Dong-Qi Liu
- Subjects
Physics ,Coherence time ,Dynamical decoupling ,Quantum decoherence ,Condensed matter physics ,Qubit ,Decoupling (cosmology) ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Quantum information science ,Nitrogen-vacancy center ,Scaling ,Electronic, Optical and Magnetic Materials - Abstract
Overcoming the spin qubit decoherence is a challenge for quantum science and technology. We investigate the decoherence process in nanodiamonds by Carr–Purcell–Meiboom–Gill (CPMG) technique at room temperature. We find that the coherence time T2 scales as n γ . The elongation effect of coherence time can be represented by a constant power of the number of pulses n. Considering the filter function of CPMG decoupling sequence as a δ function, the spectrum density of noise has been reconstructed directly from the coherence time measurements and a Lorentzian noise power spectrum model agrees well with the experiment. These results are helpful for the application of nanodiamonds to nanoscale magnetic imaging.
- Published
- 2014
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