Determinisitic Writing and Control of the Dark Exciton Spin using Short Single Optical Pulses

Abstract

We demonstrate that the quantum dot-confined dark exciton forms a long-lived integer spin solid state qubit which can be deterministically on-demand initiated in a pure state by one optical pulse. Moreover, we show that this qubit can be fully controlled using short optical pulses, which are several orders of magnitude shorter than the life and coherence times of the qubit. Our demonstrations do not require an externally applied magnetic field and they establish that the quantum dot-confined dark exciton forms an excellent solid state matter qubit with some advantages over the half-integer spin qubits such as the confined electron and hole, separately. Since quantum dots are semiconductor nanostructures that allow integration of electronic and photonic components, the dark exciton may have important implications on implementations of quantum technologies consisting of semiconductor qubits.

Added two authors, minor edits to figure captions, expanded discussion of dark exciton eigenstates

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Cited by in corpus (21)

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• Accessing the dark exciton spin in deterministic quantum-dot microlenses
• All-Optical Depletion of Dark Excitons from a Semiconductor Quantum Dot
• Probing the dark exciton states of a single quantum dot using photocurrent spectroscopy in magnetic fields
• Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot
• Deterministic preparation of spin qubits in droplet etched GaAs quantum dots using quasi-resonant excitation
• Complete state tomography of a quantum dot confined spin qubit
• The optical Stark shift to control the dark exciton occupation of a quantum dot in a tilted magnetic field
• Valley-contrasting interband transitions and excitons in symmetrically biased dice model
• Dark-bright excitons mixing in alloyed InGaAs self-assembled quantum dots
• Formation of dark excitons in monolayer transition metal dichalcogenides by a vortex beam: optical selection rules
• Exciton-photon complexes and dynamics in the concurrent strong-weak coupling regime of singular site-controlled cavity quantum electrodynamics
• Engineering Purcell factor anisotropy for dark and bright excitons in two dimensional semiconductors
• Hidden anisotropy controls spin-photon entanglement in a charged quantum dot
• Initialization of Neutral and Charged Exciton Spin States in a Telecom-Emitting Quantum Dot
• Strain-induced exciton decomposition and anisotropic lifetime modulation in a GaAs micromechanical resonator
• Magneto-optics of a charge-tunable quantum dot: Observation of a negative diamagnetic shift
• Topological spin-up triplet excitonic condensation in two-dimensional electron-hole systems
• Eliminating the confined dark-exciton qubit precession using an externally applied magnetic field
• Interplay of Rashba spin-orbit coupling and Coulomb interaction in topological spin-triplet excitonic condensates