Journal article
Ultralow-power spectroscopy of a rare-earth spin ensemble using a superconducting resonator
P Bushev, AK Feofanov, H Rotzinger, I Protopopov, JH Cole, CM Wilson, G Fischer, A Lukashenko, AV Ustinov
Physical Review B Condensed Matter and Materials Physics | AMER PHYSICAL SOC | Published : 2011
Abstract
Interfacing superconducting quantum processors, working in the GHz frequency range, with optical quantum networks and atomic qubits is a challenging task for the implementation of distributed quantum information processing as well as for quantum communication. Using spin ensembles of rare-earth ions provides an excellent opportunity to bridge microwave and optical domains at the quantum level. In this Rapid Communication, we demonstrate the ultralow-power, on-chip, electron-spin-resonance spectroscopy of Er3+ spins doped in a Y2SiO5 crystal using a high-Q, coplanar, superconducting resonator. © 2011 American Physical Society.
Grants
Funding Acknowledgements
We thank M. Azarkh and M. Drescher for the ESR study of Er:YSO crystals, A. Abdumalikov and O. Astafiev (NEC) for the fabrication of the SC resonator, and C. Muller for his useful comments and critical reading of the manuscript. This work was supported by the CFN of DFG, the EU Projects MIDAS, SCOPE, and SOLID, and the BMBF Programm "Quantum Communications" through the project QUIMP. I. P. acknowledges the support of the Alexander von Humboldt Foundation. P. B. acknowledges the financial support of KIT and MWK of Baden-Wurttemberg through the RiSC Grant.