Dresden 2011 – scientific programme

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SYHQ: Intersectional Symposium Hybrid Quantum Systems - Interfacing Atoms, Solids and Light

SYHQ 1: Hybrid Quantum Systems -- Interfacing Atoms, Solids and Light

SYHQ 1.2: Invited Talk

Thursday, March 17, 2011, 11:00–11:30, HSZ 01

Strong coupling of a spin ensemble to a superconducting resonator — •Patrice Bertet¹, Yuimaru Kubo¹, Florian Ong¹, Denis Vion¹, Vincent Jacques², Dingwei Zheng², Anaïs Dréau², Jean-François Roch², Alexia Auffeves³, Fedor Jelezko⁴, Jörg Wrachtrup⁴, Philippe Bergonzo⁵, and Daniel Esteve¹ — ¹Quantronics group, SPEC/IRAMIS/DSM, CEA-Saclay, 91191 Gif-sur-Yvette, France — ²LPQM, CNRS/ENS Cachan, 94235 Cachan, France — ³Institut Néel - CNRS-UJF, 38042 Grenoble, France — ⁴3. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany — ⁵Diamond Sensors Laboratory,CEA, LIST, 91191 Gif-sur-Yvette, France

Bridging the gap between quantum-optical and solid-state implementations of quantum information is currently one of the major challenges in the field. Microscopic quantum systems have long coherence times, whereas artificial superconducting atoms can be manipulated and entangled very rapidly and with high fidelity; it is therefore appealing to combine them to form hybrid quantum circuits. Here we report a first important step towards this goal. We have realized a quantum circuit where an ensemble of electronic spins is coupled to a frequency tunable superconducting resonator. The spins are Nitrogen-Vacancy centers in a diamond crystal. The achievement of strong coupling is manifested by the appearance of a vacuum Rabi splitting in the transmission spectrum of the resonator when it is tuned through the NV center electron spin resonance frequency [1].

[1] Y. Kubo et al., Phys. Rev. Lett. 105, 140502 (2010)