Spin-photon interface and spin-controlled photon switching in a nanobeam waveguide

Abstract

Access to the electron spin is at the heart of many protocols for integrated and distributed quantum-information processing [1-4]. For instance, interfacing the spin-state of an electron and a photon can be utilized to perform quantum gates between photons [2,5] or to entangle remote spin states [6-9]. Ultimately, a quantum network of entangled spins constitutes a new paradigm in quantum optics [1]. Towards this goal, an integrated spin-photon interface would be a major leap forward. Here we demonstrate an efficient and optically programmable interface between the spin of an electron in a quantum dot and photons in a nanophotonic waveguide. The spin can be deterministically prepared with a fidelity of 96\%. Subsequently the system is used to implement a "single-spin photonic switch", where the spin state of the electron directs the flow of photons through the waveguide. The spin-photon interface may enable on-chip photon-photon gates [2], single-photon transistors [10], and efficient photonic cluster state generation [11].

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• Dynamics of many-body photon bound states in chiral waveguide QED
• On-Chip Chiral Single-Photon Interface: Isolation and Unidirectional Emission
• Strongly correlated photon transport in waveguide QED with weakly coupled emitters
• Quantum optics with near lifetime-limited quantum-dot transitions in a nanophotonic waveguide
• GaAs quantum dots grown by droplet etching epitaxy as quantum light sources
• Narrow-linewidth tin-vacancy centers in a diamond waveguide
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• A Semiconductor Topological Photonic Ring Resonator
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• Chiral quantum optics: recent developments, and future directions
• A coherent spin-photon interface with waveguide induced cycling transitions
• Radiative Auger Process in the Single-Photon Limit
• Excitons in InGaAs Quantum Dots without Electron Wetting Layer States
• Coherent coupling of single molecules to on-chip ring resonators
• Detection of single ions in a nanoparticle coupled to a fiber cavity
• Coherent optical control of a quantum-dot spin-qubit in a waveguide-based spin-photon interface
• Quantum sensing of photonic spin density
• Position-dependent chiral coupling between single quantum dots and cross waveguides
• A chiral one-dimensional atom using a quantum dot in an open microcavity
• Correlations between Optical Properties and Voronoi-Cell Area of Quantum Dots
• On-chip spin-photon entanglement based on single-photon scattering
• Strong enhancement of heavy-hole Landé factor $q$ in InGaAs symmetric quantum dots revealed by coherent optical spectroscopy
• Single quantum emitters with spin ground states based on Cl bound excitons in ZnSe
• Modular architectures to deterministically generate graph states
• Concentrated subradiant modes in one-dimensional atomic array coupled with chiral waveguides
• Waveguide Excitation and Spin Pumping of Chirally Coupled Quantum Dots
• Semiconductor membranes for electrostatic exciton trapping in optically addressable quantum transport devices
• Energy-efficient quantum non-demolition measurement with a spin-photon interface
• Single site-controlled inverted pyramidal InGaAs QD-nanocavity operating at the onset of the strong coupling regime
• Influence of molecular beam effusion cell quality on optical and electrical properties of quantum dots and quantum wells
• Asymmetric Chiral Coupling in a Topological Resonator
• Unidirectional coupling of a quantum emitter to a subwavelength grating waveguide with engineered stationary inflection point
• Optical Spin Sorting Chain
• Routing single photons with quantum emitters coupled to nanostructures
• Spin-augmented observables for efficient photonic quantum error correction