Coherent Adiabatic Spin Control in the Presence of Charge Noise Using Tailored Pulses

Abstract

We study finite-time Landau-Zener transitions at a singlet-triplet level crossing in a GaAs double quantum dot, both experimentally and theoretically. Sweeps across the anticrossing in the high driving speed limit result in oscillations with a small visibility. Here we demonstrate how to increase the oscillation visibility while keeping sweep times shorter than T2* using a tailored pulse with a detuning dependent level velocity. Our results show an improvement of a factor ~2.9 for the oscillation visibility. In particular, we were able to obtain a visibility of ~0.5 for Stückelberg oscillations, which demonstrates the creation of an equally weighted superposition of the qubit states.

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References in corpus (6)

• Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
• Dissipative Landau-Zener transitions of a qubit: bath-specific and universal behavior
• Gauging a quantum heat bath with dissipative Landau-Zener transitions
• Nuclear State Preparation via Landau-Zener-Stueckelberg transitions in Double Quantum Dots
• Spin dynamics at the singlet-triplet crossings in double quantum dot

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• Single-spin manipulation in a double quantum dot in the field of a micromagnet
• Nonadiabatic transitions in Landau-Zener grids: integrability and semiclassical theory
• Counter-diabatic driving for fast spin control in a two-electron double quantum dot
• Probing individual split Cooper-pairs using the spin qubit toolkit
• High Fidelity Singlet-Triplet $S$-$T_{-}$ Qubits in Inhomogeneous Magnetic Fields
• Charge-noise tolerant exchange gates of singlet-triplet qubits in asymmetric double quantum dots
• Inverted Singlet-Triplet Qubit Coded on a Two-Electron Double Quantum Dot
• Partial Landau-Zener transitions and applications to qubit shuttling
• Finite time Stückelberg interferometry with nanomechanical modes
• Spin flip locking by the tunneling and relaxation in a driven double quantum dot with spin-orbit coupling
• Probe-assisted spin manipulation in one-dimensional quantum dots
• Robust composite two-qubit gates for silicon-based spin qubits