Coupled Landau-Zener-Stuckelberg quantum dot interferometers Articles uri icon

authors

  • GALLEGO MARCOS, FERNANDO
  • SANCHEZ RODRIGO, RAFAEL
  • PLATERO COELLO, GLORIA

publication date

  • February 2016

issue

  • 7

volume

  • 93

International Standard Serial Number (ISSN)

  • 2469-9950

Electronic International Standard Serial Number (EISSN)

  • 2469-9969

abstract

  • We investigate the interplay between long-range and direct photon-assisted transport in a triple quantum dot chain where local ac voltages are applied to the outer dots. We propose the phase difference between the two ac voltages as an external parameter, which can be easily tuned to manipulate the current characteristics. For gate voltages in phase opposition we find quantum destructive interferences analogous to the interferences in closed-loop undriven triple dots. As the voltages oscillate in phase, interferences between multiple paths give rise to dark states. Those totally cancel the current, and could be experimentally resolved.

keywords

  • coherent; states; blockade