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This Week at Physics

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Event Number 2200

  Thursday, September 29th, 2011

R. G. Herb Condensed Matter Seminar
Coupled modes and parametric quantum informationprocessing--from classical pendula to single photons
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Jose Aumentado, NIST Boulder
Abstract: The simple harmonic oscillator is a fundamental building block of everyday physics, from playground swings to the state of light. However, energy dissipates in many of these systems in ways that can be well described by extending these oscillator-like systems through coupling to other oscillators. This kind of coupling can be intuitively understood from a classical standpoint, but it also forms the basis for the most basic linear optical element-- the beamsplitter. In this talk, I'll show how simple superconducting devices (SQUIDs and resonators) can be used to create this interaction with microwave light, coupling microwave Fock states between harmonic oscillator modes at different frequencies combining elements of both cavity-QED and linear quantum optics. This generalized beam-splitter process, although simple, can be used to swap unknown quantum states and even build up straightforward interferometers (like 'real' beam splitters) albeit in a more abstract frequency space. I will discuss the experimental verification of this process so far, as well as briefly discuss how systems like this might be extended to address other problems more traditionally addressed in quantum optics.
Host: Robert McDermott
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