Quantum Optics Seminar: Martin Hayhurst Appel

Semiconductor quantum dots (QDs) are state-of-the-art single photon emitters in terms of brightness, photon indistinguishability and integrability in photonic devices. However, QDs have so far lacked an ancillary quantum register which would otherwise enable their use as fully-fledged quantum nodes and efficient sources of multi-dimensional photon entanglement. In this talk, I will present results on using the nuclear ensemble in a lattice-matched GaAs QD as a functional collective quantum register. I will emphasize the many advantages of GaAs QDs for electron and nuclear spin control including in-situ tuning of the coherent electro-nuclear coupling, and enhanced electron spin coherence.