Inhomogeneous Nuclear Spin Flips

Abstract

We discuss a feedback mechanism between electronic states in a double quantum dot and the underlying nuclear spin bath. We analyze two pumping cycles for which this feedback provides a force for the Overhauser fields of the two dots to either equilibrate or diverge. Which of these effects is favored depends on the g-factor and Overhauser coupling constant A of the material. The strength of the effect increases with A/V_x, where V_x is the exchange matrix element, and also increases as the external magnetic field B_{ext} decreases.

5 pages, 4 figures (jpg)

References in corpus (2)

• Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
• Nuclear State Preparation via Landau-Zener-Stueckelberg transitions in Double Quantum Dots

Cited by in corpus (11)

• Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
• Quantum dot spin qubits in Silicon: Multivalley physics
• Relaxation and Readout Visibility of a Singlet-Triplet Qubit in an Overhauser Field Gradient
• Coupling molecular spin states by photon-assisted tunneling
• Dynamic Nuclear Polarization in Double Quantum Dots
• Phase Transitions in Dissipative Quantum Transport and Mesoscopic Nuclear Spin Pumping
• Nuclear Dynamics During Landau-Zener Singlet-Triplet Transitions in Double Quantum Dots
• Suppression of Zeeman gradients by nuclear polarization in double quantum dots
• Preparation of Non-equilibrium Nuclear Spin States in Double Quantum Dots
• Inhomogeneous dynamic nuclear polarization and suppression of electron-polarization decay in a quantum dot
• Self-Quenching of Nuclear Spin Dynamics in Central Spin Problem