Robust dynamical decoupling for arbitrary quantum states of a single NV center in diamond
Fakultät Physik, Technische Universität Dortmund - D-44221 Dortmund, Germany, EU
Received: 9 March 2012
Accepted: 23 July 2012
Dynamical decoupling is a powerful technique for extending the coherence time (T2) of qubits. We apply this technique to the electron spin qubit of a single nitrogen-vacancy center in type-IIa diamond. In a crystal with natural abundance of 13C nuclear spins, we extend the decoherence time up to 2.2 ms. This is close to the T1 value of this NV center (4 ms). Since dynamical decoupling must perform well for arbitrary initial conditions, we measured the dependence on the initial state and compared the performance of different sequences with respect to initial state dependence and robustness to experimental imperfections.
PACS: 03.65.Yz – Decoherence; open systems; quantum statistical methods / 33.35.+r – Electron resonance and relaxation / 76.70.Hb – Optically detected magnetic resonance (ODMR)
© EPLA, 2012