Hyperfine mediated triplet-singlet transition probability in a double-quantum-dot system: Analogy with the double-slit experiment

2009/10/31 by Fernando Domínguez, Gloria Platero · 7 citations
Computer Science · Physics and Astronomy · #Anisotropy #Atomic physics #Excited state #Hyperfine structure #Molecule #Physics #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Semiconductor Quantum Structures and Devices #Singlet state #Triplet state #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.80.201301

published in Physical Review B 80(20) (American Physical Society) · 5 pages, 2 figures

openalex publication_date 2009/11/02 · arxiv created 2010/02/22 · arxiv updated 2010/02/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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 that differentiates the hyperfine interaction from an anisotropic magnetic field which mixes the triplet and the singlet eigenstates.

Citations

• Suppression of Spin Relaxation in an InAs Nanowire Double Quantum Dot
• Allowed and forbidden transitions in artificial hydrogen and helium atoms
• Nucleus-mediated spin-flip transitions in GaAs quantum dots
• Control and Detection of Singlet-Triplet Mixing in a Random Nuclear Field

Cited by

• Temperature-dependent dynamical nuclear polarization bistabilities in double quantum dots in the spin-blockade regime