Post-doctoral contract: microwave-spin interfaces in rare earth doped crystals (M/F)

- rare earth doped crystals spectroscopy
- low temperature measurements of spin properties

The spin degree of freedom of individual dopants trapped in ultra-pure crystals is an outstanding system for quantum information processing. They can have coherence times ranging from seconds to several hours at low temperatures. Therefore, spin states are ideal candidates to be used as quantum bits and for storing quantum information over long times. Fully exploiting the quantum potential of solid-state spins nevertheless requires interfacing them with quantum information carriers (photons) and/or other quantum systems, e.g. circuit QED based superconducting qubits. In this project, interfaces will be developed between long-lived solid-state electron spins and microwave photons based on coupling rare-earth spin states with superconducting resonators. This activity involves the team Crystals and quantum state dynamics (www.cqsd.fr ) of the IRCP institute and the Quantronics team of the SPEC laboratory at CEA. The groups collaborate within the project Mirespin which also include the Néel Institute. The final goal is to reach the single-spin sensitivity limit and the quantum coherent regime of interaction i.e. strong coupling, between individual spins and single microwave photons. This will be based on custom grown rare-earth doped crystals and nanoscale high-Q superconducting resonators.

This project will take place at IRCP (Institut de Recherche de Chimie Paris), a joint CNRS/Chimie ParisTech research unit. IRCP is one of the main chemical institutes in the Paris region and has about 200 people. It is located in Paris in the 5th district within Chimie ParisTech, a graduate school member of the PSL University. This project will also takes place at SPEC (CEA-Saclay/CNRS) located in Paris area and which has great expertise in spin systems for quantum technologies.