Determining the electronic triplet-singlet transition probability in double quantum dots: Analogy with the double slit experiment

Details Determining the electronic triplet-singlet transition probability in double quantum dots: Analogy with the double slit experiment Determining the electronic triplet-singlet transition probability in double quantum dots: Analogy with the double slit experiment

2009-10-14

arxiv.org/abs/0910.2662v2

Phys. Rev. B 80, 201301 (R) 2009

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevB.80.201301

We apply an elementary measurement scheme to calculate the electronic triplet-singlet transition mediated by hyperfine interaction in a double quantum dot. We show how the local character of the hyperfine interaction and the nuclear back-action process (flip-flop) are crucial to cancel destructive interferences of the triplet-singlet transition probability. It is precisely this cancellation which differentiates the hyperfine interaction from an anisotropic magnetic field which mixes the triplet and the singlet eigenstates.

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