A source of light-matter entanglement for quantum state distribution over hybrid matter platforms (Dr. Pau Farrera)
A source of light-matter entanglement for quantum state distribution over hybrid matter platforms
- Date: Nov 21, 2018
- Time: 01:30 PM (Local Time Germany)
- Speaker: Dr. Pau Farrera
- Location: Max-Planck-Institut für Quantenoptik
- Room: Hörsaal, Raum B 0.32 / New lecture hall, Room B 0.32
- Host: MPQ, Quantum Dynamics Division
In this talk I will speak about our source of light-matter quantum states based on laser-cooled atoms. In particular, I will explain the capabilities developed in order to transfer photonic qubits from this system to another matter platform that consists on a crystal doped with rare-earth ions. Photonic qubits generated by the atomic cloud were frequency converted and temporally shaped in order to have an optimum interaction with the ions in the crystal. These capabilities enabled to perform quantum state transfer between these two very different matter systems: the laser-cooled gas and the crystal.
The future distribution of entanglement over these two different matter objects requires that the transfer photonic qubit is entangled with the atomic gas. Going in this direction, in the second part of the talk I will speak about the generation of entanglement between a photonic time-bin qubit and a spin excitation in the atomic cloud. The time-bin encoding is suitable for frequency conversion, long distance distribution and storage in the crystal. These developed capabilities open new possibilities for quantum state transfer over remote hybrid systems, with the goal to combine the advantages of the different platforms.