The 18th International Symposium on Spin Physics

October 6-11, 2008
University of Virginia
Charlottesville, VA USA

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First Name Mike
Last Name Romalis
Affiliation Princeton University
Title Recent advances in atomic spin magnetometry
Topic Oral
Abstract of 200 words or lessSpin switching devices constructed using self-assembled magneti

I will describe recent work on measurements of very weak magnetic fields using optically pumped alkali-metal and noble gas atoms. By reducing the effects of collisions between atoms magnetic field resolution in the atto-tesla range has been achieved, surpassing the sensitivity of low temperature SQUID magnetometers. Recent applications of these techniques include recordings of magnetic fields produced by the brain, detection of nuclear magnetic resonance and inertial rotation sensing. Such sensors can also be used for tests of fundamental physics. I will describe a recent limit on new long range spin-dependent forces betweenneutrons which surpasses the strength of gravitational interactions.