Colloquium Speaker Jason Hogan today, Tuesday, October 9, 2012 at 4:00 PM

[Tate, Arnay]

Please take note of Colloquium taking place today, Tuesday, October 9, 2012 at 4:00 PM in The Robert Smith Seminar Room.  There will be a reception in the Atrium at 3:45 PM.  Details concerning the talk are as follows:



Speaker:               Jason Hogan - Stanford University

Date:                     Tuesday, October 9, 2012

Time:                    4:00 PM

Place:                    The Robert Smith Seminar Room

Title:                     "Testing General Relativity using Atom Interferometry<https://physics.osu.edu/events/colloquium-jason-hogan-stanford-university-testing-general-relativity-using-atom-interferomet>"
Abstract:               Recently there has been exciting progress in developing precision tests of gravity using atom interferometry.  Neutral atoms make excellent gravitational "test particles" and atom interferometry allows for precise measurement of the inertial forces experienced by the freely-falling atom de Broglie waves.  To this end, we have built a 10-meter tall, atomic fountain gravimeter for the purpose of testing the Equivalence Principle with freely-falling atoms.  I will report on the current status of this apparatus, which promises to be the most sensitive atom interferometer ever built, with a projected differential acceleration sensitivity of 10-15 g.  This phenomenal force sensitivity gives access to science applications which I will discuss, including setting new limits on the Equivalence Principle, measuring effects of General Relativity in a laboratory setting and detecting gravitational waves.  I will also describe our recent proposals for atom-based gravitational wave detectors which appear to offer compelling strain sensitivities in the 1 mHz to 10 Hz frequency range, providing access to a rich scientific region with substantial discovery potential.


The website for the Colloquium is https://physics.osu.edu/physics-colloquium-schedule

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