Suppression of Zeeman gradients by nuclear polarization in double quantum dots

Abstract

We use electric dipole spin resonance to measure dynamic nuclear polarization in InAs nanowire quantum dots. The resonance shifts in frequency when the system transitions between metastable high and low current states, indicating the presence of nuclear polarization. We propose that the low and the high current states correspond to different total Zeeman energy gradients between the two quantum dots. In the low current state, dynamic nuclear polarization efficiently compensates the Zeeman gradient due to the $g$-factor mismatch, resulting in a suppressed total Zeeman gradient. We present a theoretical model of electron-nuclear feedback that demonstrates a fixed point in nuclear polarization for nearly equal Zeeman splittings in the two dots and predicts a narrowed hyperfine gradient distribution.

References in corpus (6)

• Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
• Enhancing the Coherence of a Spin Qubit by Operating it as a Feedback Loop That Controls its Nuclear Spin Bath
• Spin-echo of a single electron spin in a quantum dot
• Suppression of spin relaxation in an InAs nanowire double quantum dot
• Large nuclear Overhauser fields detected in vertically-coupled double quantum dots
• Electrically-Driven Reverse Overhauser Pumping of Nuclear Spins in Quantum Dots

Cited by in corpus (14)

• Large nuclear spin polarization in gate-defined quantum dots using a single-domain nanomagnet
• The exchange-only singlet-only spin qubit
• Spin polarization anisotropy in a narrow spin-orbit-coupled nanowire quantum dot
• Simulations of electric-dipole spin resonance for spin-orbit-coupled quantum dots in Overhauser field: fractional resonances and selection rules
• Preparation of Non-equilibrium Nuclear Spin States in Double Quantum Dots
• Interplay of spin-orbit and hyperfine interactions in dynamical nuclear polarization in semiconductor quantum dots
• Line Shapes of Electric Dipole Spin Resonance in Pauli Spin Blockade
• Temperature-dependent dynamical nuclear polarization bistabilities in double quantum dots in the spin-blockade regime
• Application of the Landau-Zener-Stueckelberg-Majorana dynamics in an electrically driven flip of a hole spin
• Spontaneous and resonant lifting of the spin blockade in nanowire quantum dots
• Multistability and spin diffusion enhanced lifetimes in dynamic nuclear polarization in a double quantum dot
• Single-electron shell occupation and effective $g$-factor in few-electron nanowire quantum dots
• Transport-induced suppression of nuclear field fluctuations in multi-quantum-dot systems
• Spin separation and exchange for quantum dots in the Overhauser field