Controlled-NOT gate sequences for mixed spin qubit architectures in a noisy environment

Abstract

Explicit controlled-NOT gate sequences between two qubits of different types are presented in view of applications for large-scale quantum computation. Here, the building blocks for such composite systems are qubits based on the electrostatically confined electronic spin in semiconductor quantum dots. For each system the effective Hamiltonian models expressed by only exchange interactions between pair of electrons are exploited in two different geometrical configurations. A numerical genetic algorithm that takes into account the realistic physical parameters involved is adopted. Gate operations are addressed by modulating the tunneling barriers and the energy offsets between different couple of quantum dots. Gate infidelities are calculated considering limitations due to unideal control of gate sequence pulses, hyperfine interaction and charge noise.

21 pages, 10 figures; accepted for publication on Quantum Information Processing

References in corpus (6)

• Driven coherent oscillations of a single electron spin in a quantum dot
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Electrically driven single electron spin resonance in a slanting Zeeman field
• A high-sensitivity gate-based charge sensor in silicon
• Fast Electrical Control of Single Electron Spins in Quantum Dots with Vanishing Influence from Nuclear Spins
• Two-Qubit Pulse Gate for the Three-Electron Double Quantum Dot Qubit

Cited by in corpus (4)

• Adiabatic two-qubit gates in capacitively coupled quantum dot hybrid qubits
• Gate fidelity comparison in semiconducting spin qubit implementations affected by control noises
• Coherence time analysis in semiconducting hybrid qubit under realistic experimental conditions
• Semiconducting double-dot exchange-only qubit dynamics in presence of magnetic and charge noises