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.

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

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Cited by in corpus (41)

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• Atomistic theory of dark excitons in self-assembled quantum dots of reduced symmetry
• Depolarization of Electronic Spin Qubits Confined in Semiconductor Quantum Dots
• Single-Particle-Picture Breakdown in laterally weakly confining GaAs Quantum Dots
• Exciton lifetime and emission polarization dispersion in strongly in-plane asymmetric nanostructures
• Accessing the dark exciton spin in deterministic quantum-dot microlenses
• Generating single photons at GHz modulation-speed using electrically controlled quantum dot microlenses
• Deterministic Coherent Writing of a Long-Lived Semiconductor Spin Qubit Using One Ultrafast Optical Pulse
• All-Optical Depletion of Dark Excitons from a Semiconductor Quantum Dot
• Direct optical state preparation of the dark exciton in a quantum dot
• Coherent coupling of dark and bright excitons with vibrational strain
• Spin and reoccupation noise in a single quantum dot beyond the fluctuation-dissipation theorem
• Influence of quantum dot geometry on p-shell transitions in differently charged quantum dots
• Nanosecond-scale magneto-exciton energy oscillations in quantum wells
• Probing the dark exciton states of a single quantum dot using photocurrent spectroscopy in magnetic fields
• Optical Phase Measurement Using a Deterministic Source of Entangled Multi-photon States
• Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot
• From Quantum Dots to Quantum Dashes: Excitonic Spectra of Highly Elongated InAs/InP Nanostructures
• Deterministic preparation of spin qubits in droplet etched GaAs quantum dots using quasi-resonant excitation
• Dark Exciton Preparation in a Quantum Dot by a Longitudinal Light Field Tuned to Higher Exciton States
• 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
• Controlling the Dark Exciton Spin Eigenstates by External Magnetic Field
• Peculiar spectra of dark and bright excitons in alloyed nanowire quantum dots
• Valley-contrasting interband transitions and excitons in symmetrically biased dice model
• Phonon-assisted dark exciton preparation in a quantum dot
• Dark-bright excitons mixing in alloyed InGaAs self-assembled quantum dots
• Selection rules for the excitation of quantum dots by spatially structured light beams -- Application to the reconstruction of higher excited exciton wave functions
• 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
• Initialization of Neutral and Charged Exciton Spin States in a Telecom-Emitting Quantum Dot
• Hidden anisotropy controls spin-photon entanglement in a charged quantum dot
• Anisotropy of in-plane hole g-factor in CdTe/ZnTe quantum dots
• Photocreation of a dark electron-hole pair in a 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
• Mechanisms of optical orientation of an individual Mn${}^{2+}$ ion spin in a II-VI quantum dot
• 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