Quantum Institute: Visitor Schedule

The Quantum Lunch is regularly held on Thursdays in the Theoretical Division Conference Room, TA-3, Building 123, Room 121.
For more information, contact Diego Dalvit.

Thursday, August 28, 2008
12:30 PM to 2 PM

Speaker: Steven T. Flammia, Perimeter Institute for Theoretical Physics

Technical Host: Jim Harrington

TOPIC: "One-way quantum computing in the optical frequency comb"

Abstract
One-way quantum computing allows any quantum algorithm to be implemented by the sole use of single-qubit measurements. The difficult part is to create a universal resource state on which the measurements are made. We propose to use continuous-variable (CV) entanglement in the optical frequency comb of a single optical parametric oscillator with a multimode pump to produce a very large CV graph state with a special 4-regular graph. This scheme is interesting because of its potential for scalability, meaning that moderate-sized cluster states are preparable with current technology. Although issues of error correction and fault tolerance are yet to be fully addressed, I will discuss some schemes for discretizing the quantum information, and for proving a fault- tolerant threshold exists. Joint work with N. Menicucci and O. Pfister.