Electron spin ensemble strongly coupled to a three-dimensional microwave cavity

Details Electron spin ensemble strongly coupled to a three-dimensional microwave cavity Electron spin ensemble strongly coupled to a three-dimensional microwave cavity

2011-06-02

arxiv.org/abs/1106.0507v1

Appl. Phys. Lett. 98, 251108 (2011)

Physics

Quantum Physics

To appear in Appl. Phys. Lett

Scientific paper

10.1063/1.3601930

We demonstrate the strong coupling between an electron spin ensemble and a three-dimensional cavity in a reflection geometry. We also find that an anticrossing in the cavity/spin spectrum can be observed under conditions that the collective coupling strength $g_c$ is smaller than the spin linewidth $\gamma_s$ or the cavity linewidth. We identify a ratio of $g_c$ to $\gamma_s$ ($g_c/\gamma_s >$ 0.64) as a condition to observe a splitting in the cavity frequency. Finally, we confirm that $g_c$ scales with $\sqrt{N}$, where $N$ is the number of polarized spins.

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