The canonical example of a quantum-mechanical two-level system is spin. The simplest
picture of spin is a magnetic moment pointing up or down. The full quantum properties of …

We observed mixing between two-electron singlet and triplet states in a double quantum dot,
caused by interactions with nuclear spins in the host semiconductor. This mixing was …

We show experimentally that electron transport through GaAs-based double quantum dots
can be affected by ambient nuclear spin states in a certain regime where transport is …

In quantum dots made from materials with nonzero nuclear spins, hyperfine coupling creates
a fluctuating effective Zeeman field (Overhauser field) felt by electrons, which can be a …

We study theoretically the cooling of an ensemble of nuclear spins coupled to the spin of a
localized electron in a quantum dot. We obtain a master equation for the state of the nuclear …

The coherence of the electron spin in a semiconductor quantum dot is strongly enhanced by
mode locking through nuclear focusing, where the synchronization of the electron spin to …

We study the effect of contact hyperfine interaction on the nuclear spin diffusion coefficients
in semiconductor quantum dots. The diffusion coefficients are calculated with both the …

Quantum dots in GaAs/InGaAs structures have been proposed as a candidate system for
realizing quantum computing. The short coherence time of the electronic quantum state that …

We demonstrate local manipulation and detection of nuclear spin coherence in
semiconductor quantum wells by an optical pump-probe technique combined with pulse rf …

We analyze nuclear-spin dynamics in quantum dots and defect centers with a bound
electron under electron-mediated coupling between nuclear spins due to the hyperfine …