Coupling of an erbium spin ensemble to a superconducting resonator

Details Coupling of an erbium spin ensemble to a superconducting resonator Coupling of an erbium spin ensemble to a superconducting resonator

2012-01-09

arxiv.org/abs/1201.1718v2

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

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 Y$_2$SiO$_5$ 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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