| Autor: |
Franco-Rivera, Giovanni, Cochran, Josiah, Miyashita, Seiji, Bertaina, Sylvain, Chiorescu, Irinel |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Applied 19, 024067 (2023) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevApplied.19.024067 |
| Popis: |
We report the realization of a strong coupling between a Gd$^{3+}$ spin ensemble hosted in a scheelite (CaWO$_4$) single crystal and the resonant mode of a coplanar stripline superconducting cavity leading to a large separation of spin-photon states of 146 MHz. The interaction is well described by the Dicke model and the crystal-field Hamiltonian of the multilevel spin system. We observe a change of the crystal-field parameters due to the presence of photons in the cavity that generates a significant perturbation of the crystal ground state. Using finite-element calculations, we numerically estimate the cavity sensing volume as well as the average spin-photon coupling strength of $g_0\approx$ 620 Hz. Lastly, the dynamics of the spin-cavity states are explored via pulsed measurements by recording the cavity ring-down signal as a function of pulse length and amplitude. The results indicate a potential method to initialize this multilevel system in its ground state via an active cooling process. |
| Databáze: |
arXiv |
| Externí odkaz: |
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