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Displaying 26001 - 26025 of 74176

Synthetic Electric and Magnetic Fields for Ultracold Neutral Atoms

January 1, 2011
Author(s)
William D. Phillips, Yu-Ju Lin, Robert L. Compton, Karina K. Jimenez Garcia, Abigail R. Perry, James V. Porto, Ian B. Spielman
We use Raman coupling between magnetic sublevels of a 87Rb Bose-Einstein condensate (BEC) to create an effective vector gauge field for the neutral atoms. They behave as if they were charged particles in a magnetic vector potential. With appropriate

Urban trees and the risk of poor birth outcomes

January 1, 2011
Author(s)
Geoffrey Donovan, Yvonne Michael, David Butry, Amy Sullivan, John Chase
This paper investigated whether greater tree-canopy cover is associated with reduced risk of poor birth outcomes in Portland, Oregon. Residential addresses were geocoded and linked to classified-aerial imagery to calculate percentage tree canopy in 50, 100
Displaying 26001 - 26025 of 74176
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