Physics Colloquium

Quantum science and technology with rare earth ions and nano-photonics

Rare earth ions doped in solids are highly versatile optically addressable spin qubits with long optical and spin coherence. In this talk I give an overview of our latest progress utilizing both single and ensembles of rare earth ions to advance quantum science and technology. At low doping concertation, single ions coupled to nano-photonic resonators are well suited for establishing remote entanglement in optical quantum networks. At the same time, they couple to other nuclear spins in the environment which can be harnessed for local quantum storage and processing as needed for quantum repeater network nodes, and to explore highly entangled spin states. At high doping concertation, dense ensembles of rare earth ions can be used to mediate microwave to optical transduction and to explore exotic quantum interactions. I discuss recent results on frequency multiplexed entanglement distribution in optical quantum networks, efficient microwave to optical transduction at single photon level, quantum memories and quantum many body physics with electron and nuclear spins. We explored these research directions mainly with ytterbium 171 in yttrium orthovanadate and calcium tungstate.

Join via Zoom:
https://caltech.zoom.us/j/84497014003
Meeting ID: 844 9701 4003

The colloquium is held in Feynman Lecture Hall, 201 E. Bridge.