High fidelity all-optical control of quantum dot spins: detailed study of the adiabatic approach

Abstract

Confined electron spins are preferred candidates for embodying quantum information in the solid state. A popular idea is the use of optical excitation to achieve the ``best of both worlds'', i.e. marrying the long spin decoherence times with rapid gating. Here we study an all-optical adiabatic approach to generating single qubit phase gates. We find that such a gate can be extremely robust against the combined effect of all principal sources of decoherence, with an achievable fidelity of 0.999 even at finite temperature. Crucially this performance can be obtained with only a small time cost: the adiabatic gate duration is within about an order of magnitude of a simple dynamic implementation. An experimental verification of these predictions is immediately feasible with only modest resources.

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Cited by in corpus (18)

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• Prospects for measurement-based quantum computing with solid state spins
• Hybrid solid state qubits: the powerful role of electron spins
• Cavity-enhanced Raman emission from a single color center in a solid
• Interplay of charge and spin coherence in Landau-Zener-Stückelberg-Majorana interferometry
• Lindblad theory of dynamical decoherence of quantum-dot excitons
• Light-hole transitions in quantum dots: realizing full control by highly focused optical-vortex beams
• Theory of two-photon processes in quantum dots: coherent evolution and phonon-induced dephasing
• Effect of detuning on the phonon induced dephasing of optically driven InGaAs/GaAs quantum dots
• Robust adiabatic approach to optical spin entangling in coupled quantum dots
• Adiabatically steered open quantum systems: Master equation and optimal phase
• Superadiabatic theory for Cooper pair pumping under decoherence
• Quenching of phonon-induced processes in quantum dots due to electron-hole asymmetries
• Strong coupling, weak impact: Phonon coupling versus pure dephasing in the photon statistics of cooperative emitters
• Heat pumping with optically driven excitons
• Entanglement of Remote Spins with Unequal Coupling to an Optically Active Mediator
• Overcoming phonon-induced dephasing for indistinguishable photon sources