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A new CY elliptic fibration and tadpole cancellation
CY elliptic fibration and tadpole cancellation
2011/10/8
Abstract: Tadpole cancellation in Sen limits in F-theory was recently studied by Aluffi and Esole. We extend their results, generalizing the elliptic fibrations they used and obtaining a new case of u...
Three-Axis Measurement and Cancellation of Background Magnetic Fields to less than 50uG in a Cold Atom Experiment
Three-Axis Measurement a Cold Atom Experiment
2011/8/29
Many experiments involving cold and ultracold atomic gases require very precise control of magnetic elds that couple to and drive the atomic spins. Examples range from quantum transport,entanglement ...
Hypercharge Flux, Exotics, and Anomaly Cancellation in F-theory GUTs
Hypercharge Flux Exotics Anomaly Cancellation in F-theory GUTs
2010/12/23
We sharpen constraints related to hypercharge flux in F-theory GUTs that possess U(1) symmetries and argue that they arise as a consequence of 4-dimensional anomaly cancellation. This gives a physical...
Differential Light Shift Cancellation in a Magnetic-Field-Insensitive Transition of $^{87}$Rb
Differential Light Shift Cancellation Magnetic-Field-Insensitive Transition
2010/10/29
We demonstrate near-complete cancellation of the differential light shift of a two-photon magnetic-field-insensitive microwave hyperfine (clock) transition in $^{87}$Rb atoms trapped in an optical la...