Quantum Interference of Identical Photons from Remote GaAs Quantum Dots

Abstract

Photonic quantum technology provides a viable route to quantum communication, quantum simulation, and quantum information processing. Recent progress has seen the realisation of boson sampling using 20 single-photons and quantum key distribution over hundreds of kilometres. Scaling the complexity requires architectures containing multiple photon-sources, photon-counters, and a large number of indistinguishable single photons. Semiconductor quantum dots are bright and fast sources of coherent single-photons. For applications, a significant roadblock is the poor quantum coherence upon interfering single photons created by independent quantum dots. Here, we demonstrate two-photon interference with near-unity visibility ($93.0\pm 0.8$)\% using photons from two completely separate GaAs quantum dots. The experiment retains all the emission into the zero-phonon-line -- only the weak phonon-sideband is rejected -- and temporal post-selection is not employed. Exploiting the quantum interference, we demonstrate a photonic controlled-not circuit and an entanglement with fidelity ($85.0\pm 1.0$)\% between photons of different origins. The two-photon interference visibility is high enough that the entanglement fidelity is well above the classical threshold. The high mutual-coherence of the photons stems from high-quality materials, a diode-structure, and the relatively large quantum dot size. Our results establish a platform, GaAs QDs, for creating coherent single photons in a scalable way.

arXiv comment20 pages, 9 figures, supplementary information included in a separate PDF

References in corpus (41)

• On the Measurement of Qubits
• Heralded entanglement between solid-state qubits separated by 3 meters
• Measurement device independent quantum key distribution over 404 km optical fibre
• A bright and fast source of coherent single photons
• On-demand semiconductor single-photon source with near-unity indistinguishability
• Large-scale silicon quantum photonics implementing arbitrary two-qubit processing
• Deterministic delivery of remote entanglement on a quantum network
• Boson sampling with 20 input photons in 60-mode interferometers at $10^{14}$ state spaces
• Charge noise and spin noise in a semiconductor quantum device
• Tunable Indistinguishable Photons From Remote Quantum Dots
• Chip-to-chip quantum teleportation and multi-photon entanglement in silicon
• Quantum interference between two single photons emitted by independently trapped atoms
• High Purcell factor generation of coherent on-chip single photons
• High-rate, high-fidelity entanglement of qubits across an elementary quantum network
• Linear Optics C-Phase gate made simple
• Quantum Interference of Photon Pairs from Two Trapped Atomic Ions
• Droplet Epitaxy of Semiconductor Nanostructures for Quantum Photonic Devices
• Single-photon quantum hardware: towards scalable photonic quantum technology with a quantum advantage
• Phase-tuned entangled state generation between distant spin qubits
• Near Transform-Limited Single Photons from an Efficient Solid-State Quantum Emitter
• Exploring Dephasing of a Solid-State Quantum Emitter via Time- and Temperature- Dependent Hong-Ou-Mandel Experiments
• Low-Noise GaAs Quantum Dots for Quantum Photonics
• Scalable in operando strain tuning in nanophotonic waveguides enabling three-quantum dot superradiance
• A dark-field microscope for background-free detection of resonance fluorescence from single semiconductor quantum dots operating in a set-and-forget mode
• Measuring Controlled-NOT and two-qubit gate operation
• Sequential generation of linear cluster states from a single photon emitter
• Phonon-assisted two-photon interference from remote quantum emitters
• Simple atomic quantum memory suitable for semiconductor quantum dot single photons
• Solid-state ensemble of highly entangled photon sources at rubidium atomic transitions
• Two-photon interference in the telecom C-band after frequency conversion of photons from remote quantum emitters
• Resonance fluorescence of GaAs quantum dots with near-unity photon indistinguishability
• Signatures of two-photon pulses from a quantum two-level system
• Cavity-Enhanced Two-Photon Interference using Remote Quantum Dot Sources
• Limitations on the indistinguishability of photons from remote solid state sources
• Device-independent quantum key distribution with single-photon sources
• Frequency Feedback for Two-Photon Interference from Separate Quantum Dots
• Large-Range Frequency Tuning of a Narrow-Linewidth Quantum Emitter
• Correlations between Optical Properties and Voronoi-Cell Area of Quantum Dots
• Quantum key distribution with entangled photons generated on-demand by a quantum dot
• A deterministic source of indistinguishable photons in a cluster state
• Influence of molecular beam effusion cell quality on optical and electrical properties of quantum dots and quantum wells

Cited by in corpus (53)

• Quantum dots for photonic quantum information technology
• Diamond Integrated Quantum Photonics: A Review
• High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band
• The Deep Space Quantum Link: Prospective Fundamental Physics Experiments using Long-Baseline Quantum Optics
• Optical Memory in a Microfabricated Rubidium Vapor Cell
• Enhanced Electron Spin Coherence in a GaAs Quantum Emitter
• High Purcell-enhancement in quantum-dot hybrid circular Bragg grating cavities for GHz-clockrate generation of indistinguishable photons
• Programmable photonic integrated meshes for modular generation of optical entanglement links
• Independent operation of two waveguide-integrated quantum emitters
• Controlling the Photon Number Coherence of Solid-state Quantum Light Sources for Quantum Cryptography
• A Spin-Optical Quantum Computing Architecture
• Tailoring fusion-based photonic quantum computing schemes to quantum emitters
• Cavity-enhanced single-shot readout of a quantum dot spin within 3 nanoseconds
• Independent electrical control of two quantum dots coupled through a photonic-crystal waveguide
• Dressed-state analysis of two-color excitation schemes
• Strain-free GaSb quantum dots as single-photon sources in the telecom S-band
• Violation of Bell's inequality with quantum-dot single-photon sources
• Demultiplexed Single-Photon Source with a Quantum Dot Coupled to Microresonator
• Circular photonic crystal grating design for charge-tunable quantum light sources in the telecom C-band
• Fast and efficient demultiplexing of single photons from a quantum dot with resonantly enhanced electro-optic modulators
• Device Independent Quantum Key Distribution with realistic single-photon source implementations
• A Fiber-pigtailed Quantum Dot Device Generating Indistinguishable Photons at GHz Clock-rates
• A unipolar quantum dot diode structure for advanced quantum light sources
• Robust excitation of C-band quantum dots for quantum communication
• Deterministic generation of arbitrary n-photon states in an integrated photonic system
• GaAs quantum dots under quasi-uniaxial stress: experiment and theory
• Electric-field control of photon indistinguishability in cascaded decays in quantum dots
• Hyperfine-interaction limits polarization entanglement of photons from semiconductor quantum dots
• Single-active-element demultiplexed multi-photon source
• Eliminating temporal correlation in quantum-dot entangled photon source by quantum interference
• Purcell enhanced and tunable single-photon emission at telecom wavelengths from InAs quantum dots in circular photonic crystal resonators
• Hardware requirements for realizing a quantum advantage with deterministic single-photon sources
• Minimizing resource overhead in fusion-based quantum computation using hybrid spin-photon devices
• Nitrogen-Vacancy Color Centers in Nanodiamonds as Reference Single-Photon Emitters
• Statistical limits for quantum networks with semiconductor entangled photon sources
• Near-unity indistinguishability of single photons emitted from dissimilar and independent atomic quantum nodes
• Quantum and Classical Two-photon Interference of Single Photons with Ultralong Coherence Time
• Gated InAs quantum dots embedded in surface acoustic wave cavities for low-noise optomechanics
• Entanglement-induced collective many-body interference
• Many-Body Coherence in Quantum Transport
• Controlling coherence between waveguide-coupled quantum dots
• Perovskite Nanocrystals as Emerging Single-Photon Emitters: Progress, Challenges, and Opportunities
• Two-photon interference between mutually-detuned resonance fluorescence signals scattered off a semiconductor quantum dot
• Controlling dephasing of coupled qubits via shared-bath coherence
• A Concise Primer on Solid-State Quantum Emitters
• All-optical ultrafast arbitrary rotation of hole orbital qubits with direct phase control
• Interference between distinguishable photons
• Optomechanical resource for fault-tolerant quantum computing
• Convert laser light into single photons via interference
• Quantum CNOT Gate with Actively Synchronized Photon Pairs
• Quantum interference between autonomous dissimilar quantum light sources for hybrid quantum networks
• Switching, Amplifying, and Chirping Diode Lasers with Current Pulses for High Bandwidth Quantum Technologies
• Routing single photons with quantum emitters coupled to nanostructures