12-Photon Entanglement and Scalable Scattershot Boson Sampling with Optimal Entangled-Photon Pairs from Parametric Down-Conversion

2018/10/11 by Han-Sen Zhong, Yuan Li, Wei Li +24 · 420 citations
Computer Science · Physics and Astronomy · #Boson #Parametric statistics #Photon #Photon entanglement #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Spontaneous parametric down-conversion #Statistics #W state #physics.optics #quant-ph

paper · pdf · doi:10.1103/physrevlett.121.250505

published in Physical Review Letters 121(25), 250505 (American Physical Society) · 17 pages, 5 figures. the make-SPDC-great-again paper

arxiv created 2018/10/11 · openalex publication_date 2018/12/21 · arxiv updated 2019/05/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/08

Abstract

Entangled-photon sources with simultaneously near-unity heralding efficiency and indistinguishability are the fundamental elements for scalable photonic quantum technologies. We design and realize a degenerate telecommunication wavelength entangled-photon source from an ultrafast pulsed laser pumped spontaneous parametric down-conversion (SPDC), which shows simultaneously 97% heralding efficiency and 96% indistinguishability between independent single photons without narrow-band filtering. Such a beamlike and frequency-uncorrelated SPDC source allows generation of the first 12-photon genuine entanglement with a state fidelity of 0.572±0.024. We further demonstrate a blueprint of scalable scattershot boson sampling using 12 SPDC sources and a 12×12 mode interferometer for three-, four-, and five-boson sampling, which yields count rates more than 4 orders of magnitude higher than all previous SPDC experiments.

Citations

• Experimental quantum teleportation
• Quantum teleportation of multiple degrees of freedom of a single photon
• Violation of Bell's inequality under strict Einstein locality conditions
• Eliminating frequency and space-time correlations in multiphoton states
• Device-Independent Security of Quantum Cryptography against Collective Attacks
• Integrated multimode interferometers with arbitrary designs for photonic boson sampling
• New High-Intensity Source of Polarization-Entangled Photon Pairs
• Boson Sampling on a Photonic Chip
• Entanglement-based quantum communication over 144 km
• Experimental demonstration of five-photon entanglement and open-destination teleportation
• Experimental Free-Space Distribution of Entangled Photon Pairs Over 13 km: Towards Satellite-Based Global Quantum Communication
• Experimental entanglement of six photons in graph states
• Significant-loophole-free test of Bell's theorem with entangled photons
• Time-Bin-Encoded Boson Sampling with a Single-Photon Device
• Heralded single-photon source utilizing highly nondegenerate, spectrally factorable spontaneous parametric downconversion
• Satellite-to-ground quantum key distribution
• A strong loophole-free test of local realism
• 18-qubit entanglement with photon's three degrees of freedom
• High-efficiency single-photon generation via large-scale active time multiplexing
• Entanglement detection

Cited by

• Entanglement concentration via measurement:- role of imaginarity
• Scalable and modular generation of multipartite entangled states through memory-enhanced fusion
• Generation of quantum entangled states of multiple groups of qubits distributed in multiple cavities
• Local and scalable detection of genuine multipartite single-photon path entanglement
• Efficient entanglement generation and detection of generalized stabilizer states
• Efficient Two Photon Generation from an Emitter in a Cavity