A low-noise ferrite magnetic shield (2007)
Kornack, T. W., Smullin, S. J., Romalis, M. V.
Ferrite materials provide magnetic shielding performance similar to commonly used high permeability metals but have lower intrinsic magnetic noise generated by thermal Johnson currents due to their...
A Low-Noise High-Density Alkali Metal Scalar Magnetometer (2006)
Smullin, S. J., Savukov, I. M., Vasilakis, G., Ghosh, R. K., Romalis, M. V.
We present a theoretical and experimental study of an atomic magnetometer operating in geomagnetic field range based on oscillating field-driven Zeeman resonance in a high-density optically-pumped...
Constraints on Yukawa-Type Deviations from Newtonian Gravity at 20 Microns (2005)
Smullin, S. J., Geraci, A. A., Weld, D. M., Chiaverini, J., Holmes, S., Kapitulnik, A.
Recent theories of physics beyond the standard model have predicted deviations from Newtonian gravity at short distances. In order to test these theories, we have a built an apparatus that can...
New Experimental Constraints on Non-Newtonian Forces below 100 microns (2002)
Chiaverini, J., Smullin, S. J., Geraci, A. A., Weld, D. M., Kapitulnik, A.
We have searched for large deviations from Newtonian gravity by means of a microcantilever-based Cavendish-style experiment. Our data eliminate from consideration mechanisms of deviation that posit...
Equilibrium and Driven Vortex Phases in the Anomalous Peak Effect (1998)
Berger, J. E., Smullin, S. J., Karlin, W. L., Ling, X. S., Prober, D. E.
We report a crucial experimental test of the present models of the peak effect in weakly disordered type-II superconductors. Our results favor the scenario in which the peak effect arises from a...