Spin correlations in spin blockade

Abstract

We investigate spin currents and spin-current correlations for double quantum dots in the spin blockade regime. By analysing the time evolution of the density matrix, we obtain the spin resolved currents and derive from a generating function an expression for the fluctuations and correlations. Both the charge current and the spin current turn out to be generally super-Poissonian. Moreover, we study the influence of ac fields acting upon the transported electrons. In particular, we focus on fields that cause spin rotation or photon-assisted tunnelling.

14 pages, 9 figures

References in corpus (8)

• Driven quantum transport on the nanoscale
• Counting Statistics of Non-Markovian Quantum Stochastic Processes
• Full counting statistics of super-Poissonian shot noise in multi-level quantum dots
• Current noise in a vibrating quantum dot array
• Pauli spin blockade in weakly coupled quantum dots
• Nonadiabatic Electron Pumping: Maximal Current with Minimal Noise
• Electron Bunching in Stacks of Coupled Quantum Dots
• Coherent spin rotations in open driven double quantum dots