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Ultrafast Interferometric Sensing of Atomic Motion over a Wide Dynamic Range

May 29, 2015 - 12:00pm
Speaker: 
Kale Johnson
Institution: 
JQI

We report sensing of the motional state of an atomic ion using ultrafast momentum transfers from a pulsed laser to create an ion interferometer. We separate the atomic wavepacket in phase space, where interference with itself at a variety of points allows us to perform state tomography,  giving a map of the atomic motional state. One important application is the measurement of an average phonon number in a harmonic oscillator. This works inside of, and far outside the Lamb-Dicke regime, where the motional wavepacket is not small compared to the wavelength of light performing the momentum transfer.

PSC 2136
College Park, MD 20742