Probing weak dipole-dipole interaction using phase-modulated nonlinear spectroscopy

One-loop Weak Dipole Form Factors and Weak Dipole Moments of Heavy Fermions

The one–loop weak–magnetic and weak–electric dipole form factors of heavy fermions in a generic model are derived. Numerical predictions for the τ lepton and b quark Weak Anomalous Magnetic and Electric Dipole Moments (AWMDM and WEDM) in the SM and MSSM are reviewed. The MSSM contribution to the τ (b) AWMDM could be, in the high tan β scenario, four (thirty) times larger than the Electroweak SM...

Spatially resolved observation of dipole-dipole interaction between Rydberg atoms.

We have observed resonant energy transfer between cold Rydberg atoms in spatially separated cylinders. Resonant dipole-dipole coupling excites the 49s atoms in one cylinder to the 49p state while the 41d atoms in the second cylinder are transferred down to the 42p state. We have measured the production of the 49p state as a function of separation of the cylinders (0-80 microm) and the interacti...

Dipole-dipole interaction in a photonic crystal nanocavity

We put forward a general classical approach to obtain the quantum dipole-dipole interaction (DDI) between two two-level “atoms” in arbitrary nanostructures, in which the transfer rate of the DDI is analytically expressed as the difference between the two classical dipoles’ total radiation power and the sum of the two individual dipole’s radiation powers. The radiation power can be calculated by...

Observation of dipole-dipole interaction in a degenerate quantum gas.

We have investigated the expansion of a Bose-Einstein condensate of strongly magnetic chromium atoms. The long-range and anisotropic magnetic dipole-dipole interaction leads to an anisotropic deformation of the expanding chromium condensate which depends on the orientation of the atomic dipole moments. Our measurements are consistent with the theory of dipolar quantum gases and show that a chro...

Retarded dipole-dipole dispersion interaction potential for helium.