Quantum Orbital-State Control of a Neutral Nitrogen-Vacancy Center at Millikelvin Temperatures
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-05-21 |
| Journal | Physical Review Letters |
| Authors | NULL AUTHOR_ID, Shintaro Nakazato, Toshiharu Makino, Hiromitsu Kato, Shinobu Onoda |
| Institutions | National Institutes for Quantum Science and Technology, National Institute of Advanced Industrial Science and Technology |
Abstract
Section titled āAbstractāA neutral nitrogen-vacancy center (<a:math xmlns:a=āhttp://www.w3.org/1998/Math/MathMLā display=āinlineā><a:mrow><a:msup><a:mrow><a:mi>NV</a:mi></a:mrow><a:mrow><a:mn>0</a:mn></a:mrow></a:msup></a:mrow></a:math>) is promising for realizing strong coupling with a single microwave photon due to its large electric field sensitivity, although it is susceptible to environmental phonon noise at 5 K. Decreasing the temperature to 15 mK results in a tenfold increase in orbital relaxation time compared to that at 5 K. Dynamical decoupling pulses significantly increase the orbital coherence time to more than <c:math xmlns:c=āhttp://www.w3.org/1998/Math/MathMLā display=āinlineā><c:mrow><c:mn>1.6</c:mn><c:mtext> </c:mtext><c:mtext> </c:mtext><c:mi mathvariant=ānormalā>Ī¼</c:mi><c:mi mathvariant=ānormalā>s</c:mi></c:mrow></c:math>, representing a 30-fold improvement compared to that without decoupling pulses. Based on these results, a single <g:math xmlns:g=āhttp://www.w3.org/1998/Math/MathMLā display=āinlineā><g:mrow><g:msup><g:mrow><g:mi>NV</g:mi></g:mrow><g:mrow><g:mn>0</g:mn></g:mrow></g:msup></g:mrow></g:math> can reach the strong coupling regime when coupled with a high-impedance microwave resonator, thus opening up the possibility of microwave quantum electrodynamics using a single optically active defect center in diamond.