Regensburg 2013 – scientific programme

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SYSC: Symposium Strong Coupling in Solid State Quantum Systems

SYSC 1: Strong Coupling in Solid State Quantum Systems (SYSC)

SYSC 1.2: Invited Talk

Tuesday, March 12, 2013, 10:00–10:30, H1

Hybrid Quantum Circuit with a Superconducting Qubit Coupled to an Electron Spin Ensemble — •Yuimaru Kubo¹, Cecile Grezes¹, Igor Diniz², Jun-ichi Isoya³, Vincent Jacques⁴, Anais Dreau⁴, Jean-François Roch⁴, Alexia Auffeves², Denis Vion¹, Daniel Esteve¹, and Patrice Bertet¹ — ¹Quantronics Group, SPEC (CNRS URA 2464), CEA-Saclay, 91191 Gif-sur-Yvette, France — ²Institut Néel, CNRS, BP 166, 38042 Grenoble, France — ³Research Center for Knowledge Communities, University of Tsukuba, 305-8550 Tsukuba, Japan — ⁴LPQM (CNRS, UMR 8537), Ecole Normale Supérieure de Cachan, 94235 Cachan, France

We report the experimental realization of a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins. The qubit, of the transmon type, is coherently coupled to the spin ensemble consisting of nitrogen-vacancy (NV) centers in a diamond crystal via a frequency-tunable superconducting resonator acting as a quantum bus [1,2]. Using this circuit, we prepare arbitrary superpositions of the qubit states that we store into collective excitations of the spin ensemble and retrieve back into the qubit[3]. We also report a new method for detecting the magnetic resonance of electronic spins at low temperature with a qubit using the hybrid quantum circuit [4], as well as our recent progress on spin echo experiments.
[1] Y. Kubo et al., Phys. Rev. Lett. 105, 140502 (2010)
Y. Kubo et al., Phys. Rev. A 85, 012333 (2012)
Y. Kubo et al., Phys. Rev. Lett. 107, 220501 (2011)
Y. Kubo et al., Phys. Rev. B 86, 064514 (2012)