Coherence of nitrogen-vacancy electronic spin ensembles in diamond

By P. Stanwix, L. Pham, J. Maze, D. Sage, T. Yeung, P. Cappellaro, P. Hemmer, A. Yacoby, Mikhail D. Lukin, R. Walsworth. 2010

271 citations recorded by the source corpus.

We present an experimental and theoretical study of electronic spin decoherence in ensembles of nitrogen-vacancy (NV) color centers in bulk high-purity diamond at room temperature. Under appropriate conditions, we find ensemble NV spin coherence times $({T}_{2})$ comparable to that of single NV with ${T}_{2}g600\text{ }\ensuremath{\mu}\text{s}$ for a sample with natural abundance of $^{13}\text{C}$ and paramagnetic impurity density $\ensuremath{\sim}{10}^{15}\text{ }{\text{cm}}^{\ensuremath{-}3}$. We also observe a sharp decrease in the coherence time with misalignment of the static magnetic field relative to the NV electronic spin axis, consistent with theoretical modeling of NV coupling to a $^{13}\text{C}$ nuclear-spin bath. The long coherence times and increased signal-to-noise provided by room-temperature NV ensembles will aid many applications of NV centers in precision magnetometry and quantum information.

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

View Paper: https://www.semanticscholar.org/paper/00e8fa862dd69910192eb7ed254595f10f1690b0

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. R. Walsworth
2. M. Turner
3. J. Barry
4. J. Schloss
5. C. Hart
6. B. Buckley
7. L. Pham
8. E. Bauch

In Geophysics

1. R. Walsworth
2. M. Turner
3. J. Schloss
4. J. Barry
5. C. Hart
6. L. Pham
7. E. Bauch
8. David D. Awschalom

In Materials Chemistry

1. R. Walsworth
2. M. Turner
3. C. Hart
4. J. Schloss
5. J. Barry
6. L. Pham
7. E. Bauch
8. Stefania Castelletto

Citations in the corpus

• Sensitivity optimization for NV-diamond magnetometry (2019, background): “These effects ensemble average to an effectively shorter coherence time T2 (Stanwix et al., 2010), which degrades AC sensitivity.”
• Silicon carbide color centers for quantum applications (2020, background): “Emission in the telecommunications bands can be achieved by doping with TM impurities [42], [41], [43], [98], [99],”
• Decoherence of ensembles of nitrogen-vacancy centers in diamond (2020, background): “07 MHz/T [23, 24] is the C nuclear gyromagnetic ratio and B0 is the bias magnetic field.”
• Ultralong Dephasing Times in Solid-State Spin Ensembles via Quantum Control (2018, background): “In particular, NV centers in diamond have been extensively studied and deployed in diverse applications facilitated by long NV spin coherence times [11,12] at ambient temperature, as well as optical preparation and readout of NV spin states [10].”
• Magnetic field imaging with nitrogen-vacancy ensembles (2011, background): “Recent NV ensemble measurements of T2 in diamond samples with low nitrogen content and a natural abundance of 13C isotopes demonstrated the same long &600 μs T2 coherence times as single centers in comparable samples [15].”
• Isolated Spin Qubits in SiC with a High-Fidelity Infrared Spin-to-Photon Interface (2017, unknown): “63 ms) [42], and comparable to those of 4H-SiC divacancies (T2 = 1.”
• Room temperature coherent control of defect spin qubits in silicon carbide (2011, background): “This is the same order of magnitude as T 2 for diamond nitrogen–vacancy centre ensembles surrounded by a spin bath composed of 13 C nuclear spins and background paramagnetic impuritie”