G-Parity and Unitary Symmetry

Unitary Representations with Reeection Symmetry

The Unitary Gas and its Symmetry Properties

The physics of atomic quantum gases is currently taking advantage of a powerful tool, the possibility to fully adjust the interaction strength between atoms using a magnetically controlled Feshbach resonance. For fermions with two internal states, formally two opposite spin states ↑ and ↓, this allows to prepare long lived strongly interacting three-dimensional gases and to study the BEC-BCS cr...

R-parity Violation and Family Symmetry

In this talk, we investigate the implications of R-parity violating (RPV) operators in a model with family symmetry 1. Family symmetry can determine the form of RPV operators as well as the Yukawa matrices. We consider a concrete model with non-abelian discrete symmetry Q6, which has only three RPV trilinear operators with no baryon number violating terms. We find that ratios of decay rates of ...

Discrete vortex solitons and parity time symmetry.

We study the effect of lifting the degeneracy of vortex modes with a parity time (PT) symmetric defect, using discrete vortices in a circular array of nonlinear waveguides as an example. When the defect is introduced, the degenerate linear vortex modes spontaneously break PT symmetry and acquire complex eigenvalues, but nonlinear propagating modes with real propagation constants can still exist...

Non-abelian flavour symmetry and R-parity

If R-parity violation turns out to be a true aspect of Nature, a speculation about its possible origin could add a new dimension to the supersymmetric flavour problem. It has been shown in the past by Barbieri, Hall and their collaborators that the small breaking parameters of an approximate non-abelian flavour symmetry could govern the light quark and lepton masses and at the same time could a...