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IQIM Postdoctoral and Graduate Student Seminar

Friday, October 6, 2023
12:15pm to 1:15pm
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East Bridge 201 (Richard P. Feynman Lecture Hall)
Measuring high-amplitude quantum motion in a nanogram object
Jack Harris, Professor of Physics and Applied Physics, Yale,

Abstract: I will describe measurements of individual phonons in a 1 ng body of superfluid helium. When this body is in equilibrium, its phonon correlations are consistent (up to 4th order) with a thermal state of mean occupancy ~ 1. This purity is preserved even when the mode is driven to a coherent state with an amplitude corresponding to ~100,000 phonons. I will describe how these results can be used to constrain nonlinear extensions of quantum mechanics, and to distribute entanglement over kilometer-scale optical fiber networks.

Lunch will be provided, following the talk, on the lawn north of the Bridge Building.

For more information, please contact Marcia Brown by phone at 626-395-4013 or by email at [email protected].