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Coupling of an erbium spin ensemble to a superconducting resonator

Tue, 2012-03-20 02:36 - Lukas Hanschke
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Date: 
2012-06-08
Author(s): 

M. U. Staudt, I.-C. Hoi, P. Krantz, M. Sandberg, M. Simoen, P. Bushev, V. S. Shumeiko, G. Johansson, P. Delsing, N. Sangouard, M. Afzelius, and C. M. Wilson

Reference: 

J. Phys. B: At. Mol. Opt. Phys. 45, 124019 (2012)

URL: 

http://dx.doi.org/10.1088/0953-4075/45/12/124019

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 70 MHz.