Double and negative reflection of cold atoms in non-Abelian gauge potentials Export

@misc{citeulike:2245507, abstract = {Atom reflection is studied in the presence of a non-Abelian vector potential proportional to a spin-1/2 operator. The potential is produced by a relatively simple laser configuration for atoms with a tripod level scheme. We show that the atomic motion is described by two different dispersion branches with positive or negative chirality. As a consequence of that, atom reflection shows unusual features, since an incident wave may split into two reflected ones at a barrier, an ordinary specular reflection, and an additional non-specular one. Remarkably, the latter wave can exhibit negative reflection and may become evanescent if the angle of incidence exceeds a critical value. These reflection properties are crucial for future designs in non-Abelian atom optics.}, archivePrefix = {arXiv}, author = {Juzeliunas, Gediminas and Ruseckas, Julius and Jacob, Andreas and Santos, Luis and Ohberg, Patrik}, citeulike-article-id = {2245507}, citeulike-linkout-0 = {http://arxiv.org/abs/0801.2056}, citeulike-linkout-1 = {http://arxiv.org/pdf/0801.2056}, day = {14}, eprint = {0801.2056}, keywords = {graphene, nonabelian}, month = {Jan}, posted-at = {2008-01-17 14:35:44}, priority = {0}, title = {Double and negative reflection of cold atoms in non-Abelian gauge potentials}, url = {http://arxiv.org/abs/0801.2056}, year = {2008} }

TY - ELEC ID - citeulike:2245507 L3 - citeulike-article-id:2245507 N2 - Atom reflection is studied in the presence of a non-Abelian vector potential proportional to a spin-1/2 operator. The potential is produced by a relatively simple laser configuration for atoms with a tripod level scheme. We show that the atomic motion is described by two different dispersion branches with positive or negative chirality. As a consequence of that, atom reflection shows unusual features, since an incident wave may split into two reflected ones at a barrier, an ordinary specular reflection, and an additional non-specular one. Remarkably, the latter wave can exhibit negative reflection and may become evanescent if the angle of incidence exceeds a critical value. These reflection properties are crucial for future designs in non-Abelian atom optics. TI - Double and negative reflection of cold atoms in non-Abelian gauge potentials KW - graphene KW - nonabelian AU - Juzeliunas, Gediminas AU - Ruseckas, Julius AU - Jacob, Andreas AU - Santos, Luis AU - Ohberg, Patrik PY - 2008/Jan/14/ UR - http://arxiv.org/abs/0801.2056 ER -