We acknowledge financial support by Labex PALM, CNRS through Institut de Physique, GDR Quantum Information, Fondations & Applications and GDR mesoscopic physics, European program Scaleqit , CEA-IRAMIS, and Google.
We acknowledge financial support by Labex PALM, CNRS through Institut de Physique, GDR Quantum Information, Fondations & Applications and GDR mesoscopic physics, European program Scaleqit , CEA-IRAMIS, and Google.