Noise suppression and long-range exchange coupling for gallium arsenide spin qubits

Abstract

This thesis presents the results of the experimental study performed on spin qubits realized in gate-defined gallium arsenide quantum dots, with the focus on noise suppression and long-distance coupling.

PhD thesis, supervised by Charles M. Marcus and Ferdinand Kuemmeth, submitted to the PhD School of the Faculty of Science, University of Copenhagen in June 2017, 223 pages, 92 figures

References in corpus (28)

• Charge insensitive qubit design derived from the Cooper pair box
• Surface codes: Towards practical large-scale quantum computation
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Majorana bound states in a coupled quantum-dot hybrid-nanowire system
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Optimized Dynamical Decoupling in a Model Quantum Memory
• How to Enhance Dephasing Time in Superconducting Qubits
• Circuit Quantum Electrodynamics with a Spin Qubit
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Single Ion Quantum Lock-In Amplifier
• Performance of Deterministic Dynamical Decoupling Schemes: Concatenated and Periodic Pulse Sequences
• Quantum many-body theory of qubit decoherence in a finite-size spin bath
• Suppressing qubit dephasing using real-time Hamiltonian estimation
• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
• Electron Spin Dephasing due to Hyperfine Interactions with a Nuclear Spin Bath
• Experimental noise filtering by quantum control
• Ultra-long distance interaction between spin qubits
• Dynamic Nuclear Polarization with Single Electron Spins
• Measurement of Temporal Correlations of the Overhauser Field in a Double Quantum Dot
• Fast Electrical Control of Single Electron Spins in Quantum Dots with Vanishing Influence from Nuclear Spins
• Conditional operation of a spin qubit
• Application of Optimal Control to CPMG Refocusing Pulse Design
• Quadrupolar induced suppression of nuclear spin bath fluctuations in self-assembled quantum dots
• Decoherence of a qubit by non-Gaussian noise at an arbitrary working point
• Nuclear spin dynamics and Zeno effect in quantum dots and defect centers
• Two-Qubit Pulse Gate for the Three-Electron Double Quantum Dot Qubit
• Spin-dependent current through a quantum dot from spin-polarized non-equilibrium quantum Hall edge channels