Coupling of an erbium spin ensemble to a superconducting resonator

M. U. Staudt, I.-C. Hoi, Philip Krantz, Martin Sandberg, Michaël Simoen, Pavel Bushev, Nicolas Sangouard, Mikael Afzelius, V. S. Shumeǐko, Göran Johansson

Abstract

A quantum coherent interface between optical and microwave photons can be used as a basic building block within a future quantum information network.The interface is envisioned as an ensemble of rare-earth ions coupled to a superconducting resonator, allowing for coherent transfer between optical and microwave photons.Towards this end, we have realized a hybrid device coupling a Er 3+ doped Y2SiO5 crystal in a superconducting coplanar waveguide cavity.We observe a collective spin coupling of 4 MHz and a spin linewdith of down to 75 MHz.

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• Journal of Physics B Atomic Molecular and Optical Physics - View
• arXiv (Cornell University) - View - PDF
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