From Physics.aps.org: Atom interferometers can measure daily changes in the local gravitational acceleration (purple arrows) on Earth arising from violations of the laws of relativity. Positions of the Sun indicate the passage of the day, while the orientations of the purple arrow indicate the corresponding direction of the acceleration. The precise way in which the acceleration varies in direction and magnitude over time can be used to determine a set of coefficients whose nonzero values would indicate Lorentz violation. Inset: The local gravitational acceleration is obtained by measuring the difference in phase between the matter waves of cesium atoms moving in the gravitational field.
Monday, July 6, 2009
Quick Link: Our Energy Secretary is Still Publishing Papers
And they are interesting and potentially important. This paper was put on the archives about 6 months ago but no officially published until today. Physics, an awesome website with commentary about interesting articles posted in all areas of physics, has a discussion of it. It's written for physicists so it might be a bit dense for public consumption. If I find the time I'll write up a little summary of it that might be easier to digest.
From Physics.aps.org: Atom interferometers can measure daily changes in the local gravitational acceleration (purple arrows) on Earth arising from violations of the laws of relativity. Positions of the Sun indicate the passage of the day, while the orientations of the purple arrow indicate the corresponding direction of the acceleration. The precise way in which the acceleration varies in direction and magnitude over time can be used to determine a set of coefficients whose nonzero values would indicate Lorentz violation. Inset: The local gravitational acceleration is obtained by measuring the difference in phase between the matter waves of cesium atoms moving in the gravitational field.
From Physics.aps.org: Atom interferometers can measure daily changes in the local gravitational acceleration (purple arrows) on Earth arising from violations of the laws of relativity. Positions of the Sun indicate the passage of the day, while the orientations of the purple arrow indicate the corresponding direction of the acceleration. The precise way in which the acceleration varies in direction and magnitude over time can be used to determine a set of coefficients whose nonzero values would indicate Lorentz violation. Inset: The local gravitational acceleration is obtained by measuring the difference in phase between the matter waves of cesium atoms moving in the gravitational field.
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