Séminaire du LPTMS : Lih-King Lim

Mass and chirality inversion of a Dirac cone pair in Stückelberg interferometry

Lih-King LIM (Institut d’Optique, Palaiseau)

The aim of the present work is to show that a Stückelberg interferometer made of two massive Dirac cones can reveal information on band eigenstates such as the chirality and mass sign of the cones. For a given spectrum featuring two gapped cones, we propose several low-energy Hamiltonians differing by their eigenstates properties. The corresponding inter-band transition probability is affected by such differences in its interference fringes being shifted by a new phase of geometrical origin. This phase can be a useful bulk probe for cold atoms in topological optical lattices.

Date/Time : 05/02/2014 - 14:30 - 16:00

Location : LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay