Path-dependent initialization of a single quantum dot exciton spin in a nano-photonic waveguide

Abstract

We demonstrate a scheme for in-plane initialization and readout of a single exciton spin in an InGaAs quantum dot (QD) coupled to a GaAs nanobeam waveguide. The chiral coupling of the QD and the optical mode of the nanobeam enables spin initialization and readout fidelity approaching unity in magnetic field $B=1$ T and $\sim$0.9 without the field. We further show that this in-plane excitation scheme is independent of the incident excitation laser polarization and depends solely on the excitation direction. This scheme provides a robust in-plane spin excitation basis for a photon-mediated spin network for quantum information applications.

arXiv comment5 pages, 3 figures

References in corpus (23)

• The Physical Implementation of Quantum Computation
• Spin-orbit interactions of light
• Chiral Quantum Optics
• Interfacing single photons and single quantum dots with photonic nanostructures
• Chiral nanophotonic waveguide interface based on spin-orbit coupling of light
• Deterministic photon-emitter coupling in chiral photonic circuits
• Near-unity coupling efficiency of a quantum emitter to a photonic-crystal waveguide
• Efficient high-fidelity quantum computation using matter qubits and linear optics
• Generation of heralded entanglement between distant hole spins
• Chirality of nanophotonic waveguide with embedded quantum emitter for unidirectional spin transfer
• Strong coupling between single atoms and non-transversal photons
• Coherent control and suppressed nuclear feedback of a single quantum dot hole qubit
• Polarization engineering in photonic crystal waveguides for spin-photon entanglers
• Interfacing a quantum dot spin with a photonic circuit
• Non-Markovian Dynamics in Chiral Quantum Networks with Spins and Photons
• Coherent optical control of the spin of a single hole in a quantum dot
• Monolithic Integration of a Quantum Emitter with a Compact On-chip Beam-splitter
• Implementation of Chiral Quantum Optics with Rydberg and Trapped-ion Setups
• Excitation spectroscopy of single quantum dots at tunable positive, neutral and negative charge states
• All-electrical coherent control of the exciton states in a single quantum dot
• Radiative cascades in charged quantum dots
• High-fidelity initialization of long-lived quantum dot hole spin qubits by reduced fine-structure splitting
• Polarization correlated photons from a positively charged quantum dot

Cited by in corpus (11)

• Chiral topological photonics with an embedded quantum emitter
• On-Chip Chiral Single-Photon Interface: Isolation and Unidirectional Emission
• 99% beta factor and directional coupling of quantum dots to fast light in photonic crystal waveguides determined by hyperspectral imaging
• Non-Reciprocal Transmission and Reflection of a Chirally-Coupled Quantum Dot
• Chiral Interaction Induced Near-Perfect Photon Blockade
• Engineering strong chiral light-matter interactions in a waveguide-coupled nanocavity
• Position-dependent chiral coupling between single quantum dots and cross waveguides
• Waveguide Excitation and Spin Pumping of Chirally Coupled Quantum Dots
• A solid state emitter embedded in a microcavity under intense excitation: a variational master equation approach
• Quantum dots as optimized chiral emitters for photonic integrated circuits
• Asymmetric Chiral Coupling in a Topological Resonator