Dicke Effect in the Tunnel Current through two Double Quantum Dots

Details Dicke Effect in the Tunnel Current through two Double Quantum Dots Dicke Effect in the Tunnel Current through two Double Quantum Dots

2003-05-19

arxiv.org/abs/cond-mat/0305439v1

Phys. Rev. B 68, 035309 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 6 figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.035309

We calculate the stationary current through two double quantum dots which are interacting via a common phonon environment. Numerical and analytical solutions of a master equation in the stationary limit show that the current can be increased as well as decreased due to a dissipation mediated interaction. This effect is closely related to collective, spontaneous emission of phonons (Dicke super- and subradiance effect), and the generation of a `cross-coherence' with entanglement of charges in singlet or triplet states between the dots. Furthermore, we discuss an inelastic `current switch' mechanism by which one double dot controls the current of the other.

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