Adventures in Entanglement with Photonic Quantum Steering
June 25th, 2018 GEOFF PRYDE Griffith University, Brisbane, Australia

Quantum steering (or EPR steering) is the formalization of the original EPR effect, and Schrodinger’s generalization of it, as a quantum information task for arbitrary states and measurements. Quantum steering can be viewed independently of fundamental quantum interpretations by framing the problem as an entanglement verification protocol between two parties in which one of the parties, or her apparatus, is untrusted. Like other nonlocal correlation tests (Bell inequalities, entanglement witnesses, etc), quantum steering can be seen as a primitive for a range of quantum information tasks, especially between remote parties.

In this talk, I’ll explain quantum steering, talk about its tolerance to loss and noise, explore the fundamental asymmetry of this nonlocal effect, and show how a heralded steering protocol can allow a entanglement sharing over a basic quantum repeater link with the detection loophole closed. Each of these topics will be illustrated with results from photonic quantum steering experiments performed in the Quantum Optics and Information Lab at Griffith University.

Seminar, June 25, 2018, 15:00. ICFO’s Seminar Room

Hosted by Prof. Morgan Mitchell