Room-temperature manipulation and decoherence of a single spin in diamond

By Ronald Hanson, O. Gywat, David D. Awschalom. 2006

141 citations recorded by the source corpus.

Here, we report coherent control of the electron spin state of a single N-V center at room temperature. We demonstrate that we can coherently drive single-spin rotations Rabi nutations and undo low-frequency dephasing by application of a Hahn spin echo sequence. We use this capability to study the coherence of the N-V center as a function of applied magnetic field. By comparing the magnetic-field dependences of the decoherence rate and the photoluminescence, we find that the coherence of the N-V center spin is strongly affected by the resonant spin exchange with the surrounding nitrogen spins at specific magnetic fields. At other fields, we find evidence that the dephasing caused by spin flips of the nitrogen electrons is the main contribution to the observed decoherence. The N-V center consists of a substitutional nitrogen atom next to a vacancy in the diamond lattice. We study the negatively charged state of the N-V center N-V , which has a

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/00bddebb0355df7221fba74913b9c04d4ace1442

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In Atomic and Molecular Physics, and Optics

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Citations in the corpus

Challenges for semiconductor spintronics (2007, background): “), the demonstration of coherent single-spin manipulation in diamond, and numerous examples of gate operations performed on ensembles of spin”
Scalable Integration of Long-Lived Quantum Memories into a Photonic Circuit (2014, methodology): “[41] R Hanson, O.”
A quantum memory intrinsic to single nitrogen-vacancy centres in diamond (2011, background): “This bath of impurity spins, along with 13 C spins, generates a fluctuating magnetic field environment that limits the spin coherence tim”
Spins in few-electron quantum dots (2006, background): “To date, driven coherent rotations of a single spin in a solid have only been realized using ESR, and only in a few specific systems (Hanson et al., 2006; Jelezko et al., 2004; Rugar et al., 2004; Xiao et al., 2004), including in a quantum dot (Koppens et al., 2006).”
13C hyperfine interactions in the nitrogen-vacancy centre in diamond (2011, background): “For example, some of the data illustrated in figure 2 closely resemble observations interpreted as evidence of coupling between an NV and an electronic spin associated with a substitutional nitrogen impurity [2, 21]; 13C interactions may provide an alternative explanation.”
Room temperature coherent control of defect spin qubits in silicon carbide (2011, unknown): “2b , the Rabi frequency increases linearly with the square root of microwave power, as expected from the Rabi formul”