Coherent electric field control of orbital state of a neutral nitrogen-vacancy center

Nat. Commun. 15, 4039 (2024) · DOI: 10.1038/s41467-024-47973-3

License: CC BY 4.0.

Abstract

The negatively charged nitrogen-vacancy (NV) center in diamond is a promising building block for quantum networks. However, the optical transition of the NV center is sensitive to electric field noise, and the coupling to the electric field has not been fully exploited. Here, we demonstrate the coherent control of the orbital state of a neutrally charged NV center (NV$^0$) using a microwave electric field. We first measure the DC electric susceptibility and the orbital relaxation time of the NV$^0$ ground state. We then observe optically detected electrical resonance and Autler-Townes splitting, and finally demonstrate Rabi oscillation and Ramsey interference of the orbital state, obtaining an orbital coherence time of 31.0 ns. The demonstrated electrical control of the orbital state offers a route to hybrid quantum systems coupling the NV center to electrical circuits.

Figures

6 panels with data across 5 figures. Each panel page shows the plot, its columns and its files; each data.csv begins with a header naming the paper, the panel, the source, the license and the provenance route.

Fig. 1

• panel (d): PLE frequencies of the two branches, $|0\rangle$ and $|1\rangle$, against Voltage (V), in MHz above 521.271 THz. The printed axis, in GHz against the same stated reference, sits about 271 GHz lower. The inset of the printed panel, the difference between the two branches, is not shown. data.csv

Fig. 2

• panel (b): Normalized counts $B/A$ against Delay time (ns), with standard-deviation error bars and the exponential fit. The inset of the printed panel, the time-resolved PL counts of two pulses 100 ns apart, is not shown. data.csv

Fig. 3

• panel (b): ODER spectrum of NV$^0$: PL counts (cps) against Frequency (MHz) + 12 GHz, with standard-deviation error bars and the Gaussian fit. data.csv

Fig. 4

• panel (b): Rabi oscillation: Normalized counts (arb. units) against Microwave pulse width (ns), with standard-deviation error bars and the cosinusoidal fit. data.csv
• panel (c): Rabi frequency (MHz) against the square root of the input power, $\sqrt{P}$ ($\mu$W$^{1/2}$), with the linear fit. data.csv

Fig. 5

• panel (b): Ramsey interference: Normalized counts (arb. units) against Delay time (ns), the free precession time, with standard-deviation error bars and the fit $A\sin(\Delta t + \phi)\,e^{-t/T_2^*} + B$. data.csv

Cite

Hodaka Kurokawa, Keidai Wakamatsu, Shintaro Nakazato, Toshiharu Makino, Hiromitsu Kato, Yuhei Sekiguchi, Hideo Kosaka. Coherent electric field control of orbital state of a neutral nitrogen-vacancy center. Nat. Commun. 15, 4039 (2024). https://doi.org/10.1038/s41467-024-47973-3

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