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AP 483 seminar presents "Quantum computing over the rainbow: the quantum optical frequency comb as a platform for measurement-based universal quantum computing"

Quantum computing over the rainbow: the quantum optical frequency comb as a platform for measurement-based universal quantum computing
Monday, September 14, 2020 - 4:15pm
Prof. Olivier Pfister (University of Virginia)
Abstract / Description: 

An ultrafast laser emits vastly multimode light over a broad spectral band, a.k.a. the optical frequency comb (OFC), but the emission happens but one photon at a time, if in a stimulated manner, and no entanglement is created in the light. Changing the gain medium from linear (one-photon) to nonlinear (two-photon) yields an optical parametric oscillator which features massively multipartite entanglement of the OFC modes, as demonstrated experimentally by our group and others. This entanglement can then be exquisitely tailored to cluster states with specific graphs, in particular the two-dimensional ones that are universal for measurement-based, one-way quantum computing. It is worth noting that this requires only sparse experimental resources that are highly compatible with integrated optics, thereby paving the way to the realization of practical, fault-tolerant quantum computers.

This seminar is sponsored by the department of Applied Physics and the Ginzton Laboratory.

Organized by Prof. Amir Safavi-Naeini

Olivier Pfister received the B.S. in Physics from Université de Nice, France, in 1987, and the M.S. and the Ph.D. in Physics from Université Paris-Nord, France, in 1989 and 1993. In 1994, he was a lecturer at Conservatoire National des Arts et Métiers, in Paris. He was then a Research Associate with John L. Hall at JILA, University of Colorado (1994-97) and with Daniel J. Gauthier at Duke University (1997-99). In 1999, he joined the faculty of the University of Virginia, where he is now a Professor of Physics. Olivier Pfister is a fellow of the American Physical Society and a member of the Optical Society of America. His general research area is atomic, molecular, and optical (AMO) physics, with past interests in ultrahigh resolution laser spectroscopy, symmetry effects in small molecules, nonlinear optics for optical frequency chains, and two-photon lasers. His current research interests are quantum computing with light and quantum measurements at the ultimate precision.