Friday, April 21, 2017
4:00 PM - 5:00 PM
Where: Technological Institute, L211, 2145 Sheridan Road, Evanston, IL 60208 map it
Audience: Faculty/Staff - Student - Public - Post Docs/Docs - Graduate Students
Title: Schrödinger Cats and Photonic Quantum Information Processing
Speaker: Steve Girvin, Yale
A revolution is underway in the construction of ‘artificial atoms’ out of superconducting electrical circuits. These macroscopic ‘atoms’ have quantized energy levels and can emit and absorb quanta of light (in this case microwave photons), just like ordinary atoms. The large size of these ‘atoms’ yields remarkably strong atom-photon coupling and has given us the ability to completely control and measure the quantum state of the electromagnetic field in a cavity at the level of individual microwave photons.
In particular, it is now possible to create record large ‘Schrödinger cat’ photon states and cats delocalized and entangled between two boxes. In addition to being used to study quantum mechanics at macroscopic scales, these cat states form a novel but highly successful basis for quantum error correction in a ‘photonic’ quantum computer. This talk will present an elementary introduction to the field as well as an overview of recent progress.
Keywords: Physics, Astronomy, colloquium