Dynamical nuclear spin polarization and the Zamboni effect in gated double quantum dots

Abstract

A dynamical nuclear polarization scheme is studied in gated double dots. We demonstrate that a small polarization ($\sim 0.5$) is sufficient to enhance the singlet decay time by two orders of magnitude. This enhancement is attributed to an equilibration process between the nuclear reservoirs in the two dots accompanied by reduced fluctuations in the Overhauser fields, that are mediated by the electron-nuclear spin hyperfine interaction.

4 pages, 3 figures

References in corpus (6)

• Single-shot readout of electron spin states in a quantum dot using spin-dependent tunnel rates
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
• Enhancement of electron spin coherence by optical preparation of nuclear spins
• Effect of Exchange Interaction on Spin Dephasing in a Double Quantum Dot
• Universal Scaling of Hyperfine-Induced Electron Spin Echo Decay

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