Alexander, J;
Dold, G;
Kennedy, OW;
Šimėnas, M;
O'Sullivan, J;
Zollitsch, CW;
Welinski, S;
... Morton, JJL; + view all
(2022)
Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime.
Physical Review B
, 106
(24)
, Article 245416. 10.1103/PhysRevB.106.245416.
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Abstract
Rare-earth doped crystals have long coherence times and the potential to provide quantum interfaces between microwave and optical photons. Such applications benefit from a high cooperativity between the spin ensemble and a microwave cavity - this motivates an increase in the rare-earth ion concentration which in turn impacts the spin coherence lifetime. We measure spin dynamics of two rare-earth spin species, {145}^Nd and Yb, doped into Y_{2}SiO_{5}, coupled to a planar microwave resonator in the high-cooperativity regime, in the temperature range 1.2K to 14mK. We identify relevant decoherence mechanisms, including instantaneous diffusion arising from resonant spins and temperature-dependent spectral diffusion from impurity electron and nuclear spins in the environment. We explore two methods to mitigate the effects of spectral diffusion in the Yb system in the low-temperature limit, first, using magnetic fields of up to 1 T to suppress impurity spin dynamics and, second, using transitions with low effective g factors to reduce sensitivity to such dynamics. Finally, we demonstrate how the "clock transition"present in the {171}^Yb system at zero field can be used to increase coherence times up to T_{2} = 6(1)ms.
| Type: | Article |
|---|---|
| Title: | Coherent spin dynamics of rare-earth doped crystals in the high-cooperativity regime |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.106.245416 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.106.245416 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10162511 |
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