Realizing a Deterministic Source of Multipartite-Entangled Photonic Qubits

Abstract

Sources of entangled electromagnetic radiation are a cornerstone in quantum information processing and offer unique opportunities for the study of quantum many-body physics in a controlled experimental setting. While multi-mode entangled states of radiation have been generated in various platforms, all previous experiments are either probabilistic or restricted to generate specific types of states with a moderate entanglement length. Here, we demonstrate the fully deterministic generation of purely photonic entangled states such as the cluster, GHZ, and W state by sequentially emitting microwave photons from a controlled auxiliary system into a waveguide. We tomographically reconstruct the entire quantum many-body state for up to $N=4$ photonic modes and infer the quantum state for even larger $N$ from process tomography. We estimate that localizable entanglement persists over a distance of approximately ten photonic qubits, outperforming any previous deterministic scheme.

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Cited by in corpus (53)

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• Coherent control of a symmetry-engineered multi-qubit dark state in waveguide quantum electrodynamics
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• A flying Schrödinger cat in multipartite entangled states
• Sequential generation of projected entangled-pair states
• Topological multi-mode waveguide QED
• Fusion of deterministically generated photonic graph states
• High-threshold quantum computing by fusing one-dimensional cluster states
• Photon-number entanglement generated by sequential excitation of a two-level atom
• Photonic resource state generation from a minimal number of quantum emitters
• Efficient Information Retrieval for Sensing via Continuous Measurement
• All-photonic architectural roadmap for scalable quantum computing using Greenberger-Horne-Zeilinger states
• Realization of a Universal Quantum Gate Set for Itinerant Microwave Photons
• Near-deterministic hybrid generation of arbitrary photonic graph states using a single quantum emitter and linear optics
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• Multipartite correlations in quantum collision models
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• Experimental entanglement generation using multiport beam splitters
• Deterministic generation of a 20-qubit two-dimensional photonic cluster state
• Continuous and deterministic all-photonic cluster state of indistinguishable photons
• Deterministic one-way logic gates on a cloud quantum computer
• Extracting perfect GHZ states from imperfect weighted graph states via entanglement concentration
• Deterministic generation of photonic entangled states using decoherence-free subspaces
• Generalized Quantum Repeater Graph States
• Deterministic generation of shaped single microwave photons using a parametrically driven coupler
• Parity-encoding-based quantum computing with Bayesian error tracking
• Directional emission and photon bunching from a qubit pair in waveguide
• Generation of genuine multipartite entangled states via indistinguishability of identical particles
• Heralding Higher-Dimensional Bell and Greenberger-Horne-Zeilinger States Using Multiport Splitters
• Collisional open quantum dynamics with a generally correlated environment: Exact solvability in tensor networks
• Generation of photonic tensor network states with Circuit QED
• Entanglement of photonic modes from a continuously driven two-level system
• Deterministic generation of frequency-bin-encoded microwave photons
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• Entanglement concentration via measurement:- role of imaginarity