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| AMP: Fundamental Symmetries | ||||
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AMP research on atomic clocks and quantum optics includes precise tests of fundamental symmetries of physics (Lorentz invariance) linked to questions about the origin and fate of the universe. In particular, these measurements can be used to test the standard models of physics, with profound implications for cosmology. This research also enables Very Long Baseline Interferometry (VLBI) astronomy and precise navigation of spacecraft. Measurements on low temperature collisions between hydrogen atoms contribute to the understanding of basic atomic processes.
Project Links
Walsworth group, precision tests of fundamental physics
People Ron Walsworth, David F. Phillips, and collaborators |
Hydrogen masers have been built in our Hydrogen Maser Lab lab since
the 1960's. Providing exceptional fractional frequency stability
for periods of hours to days, hydrogen masers have many uses in
time keeping and basic physics. Our H Masers have been used
throughout the world for spacecraft tracking, radio astronomy, atomic
physics and many other applications. They have also flown in space
for precise tests of general relativity. We are presently performing
tests of Lorentz invariance with our hydrogen masers by searching for
an orientation or velocity dependence of a maser frequency as thet
maser moves with respect to the fixed stars due to the rotation of
the earth or its revolution about the sun. | ||
