Realization and characterization of a 2-photon 4-qubit linear cluster state

Abstract

We report on the experimental realization of a 4-qubit linear cluster state via two photons entangled both in polarization and linear momentum. This state was investigated by performing tomographic measurements and by evaluating an entanglement witness. By use of this state we carried out a novel nonlocality proof, the so-called ``stronger two observer all versus nothing'' test of quantum nonlocality.

4 pages, 4 figures

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• Experimental demonstration of graph-state quantum secret sharing
• Genuine High-Order Einstein-Podolsky-Rosen Steering
• Hyperentanglement of two photons in three degrees of freedom
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• Experimental demonstration of a graph state quantum error-correction code
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• Error protected qubits in a silicon photonic chip
• Generation of high-fidelity four-photon cluster state and quantum-domain demonstration of one-way quantum computing
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• Experimental demonstration of the Einstein-Podolsky-Rosen steering game based on the All-Versus-Nothing proof
• Active one-way quantum computation with 2-photon 4-qubit cluster states
• Experimental Realization of a Controlled-NOT Gate with Four-Photon Six-Qubit Cluster States
• Optical Quantum Computation
• Experimental violation of a Bell inequality with two different degrees of freedom of entangled particle pairs
• Faithful entanglement purification for high-capacity quantum communication with two-photon four-qubit systems
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• Quantum-Computing Architecture based on Large-Scale Multi-Dimensional Continuous-Variable Cluster States in a Scalable Photonic Platform
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• Efficient generation of universal two-dimensional cluster states with hybrid systems
• Multipartite entanglement in four-qubit cluster-class states
• Mermin inequalities for perfect correlations
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• Experimental Demonstration of Decoherence-Free One-Way Information Transfer
• Exploring Energy-Time Entanglement Using Geometric Phase
• Cluster-state quantum computing enhanced by high-fidelity generalized measurements
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• One-way quantum computation with four-dimensional photonic qudits
• Experimental characterization of universal one-way quantum computing
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• Experimental generation of a high-fidelity four-photon linear cluster state
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• Fidelity measurement of a multiqubit cluster state with minimal effort
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• Experimental Test of Bell inequalities with Six-Qubit Graph States
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• Nonclassical advantage in metrology established via quantum simulations of hypothetical closed timelike curves
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• Partial Bell-state analysis with parametric down conversion in the Wigner function formalism
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• Entanglement-fidelity relations for inaccurate ancilla-driven quantum computation
• Proposal for a new scheme for producing a two-photon, high dimensional hyperentangled state
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• Polarization entanglement with GRaded-INdex lenses
• Atom-mediated deterministic generation and stitching of photonic graph states
• Exact Solvability Of Entanglement For Arbitrary Initial State in an Infinite-Range Floquet System
• Collective unitary evolution with linear optics by Cartan decomposition
• Experimental nonlocality-based network diagnostics of mutipartite entangled states
• Testing equivalence of pure quantum states and graph states under SLOCC