ELFT HÍRADÓ

[Varga Imre <varga AT galilei.phy.bme.hu>]

                                  MEGHIVO
          a BME Fizikai Intezet, Elmeleti Fizika Tanszek
                              szeminariumara:



                                 Dora Balazs
                           BME, Fizika Tanszek


                "Non-linear electric transport in graphene:
        quantum quench dynamics and the Schwinger mechanism"

        Abstract: We present a unified view of electric transport in undoped
        graphene for finite electric field. The weak field results agree with 
the
        Kubo approach. For strong electric field, the current increases
        non-linearly with the electric field as E^3/2. As the Dirac point is 
moved
        around in reciprocal space by the field, excited states are generated,
        in a way analogous to the generation of defects in a quench  through
        a quantum critical point. These results are also analyzed in terms of
        Schwinger's pair        production and Landau-Zener tunneling. An 
experiment
        for cold atoms in optical lattices is proposed to test these ideas.

       Helye: BME Fizikai Intezet, Elmeleti Fizika Tanszek
                 Budafoki ut 8. F-epulet, III. lepcsohaz, magasfoldszint
                 Szeminariumi szoba

       Ideje: 2010. februar 5. pentek, 10:15.

       Minden erdeklodot szivesen latunk.

                                                                              
  Varga Imre