Spin-orbit hybrid entanglement of photons and quantum contextuality

Abstract

We demonstrate electromagnetic quantum states of single photons and of correlated photon pairs exhibiting "hybrid" entanglement between spin and orbital angular momentum. These states are obtained from entangled photon pairs emitted by spontaneous parametric down conversion, by employing a $q$-plate for coupling the spin and orbital degrees of freedom of a photon. Entanglement and contextual quantum behavior (that is also non-local, in the case of photon pairs) is demonstrated by the reported violation of the Clauser-Horne-Shimony-Holt inequality. In addition a classical analog of the hybrid spin-orbit photonic entanglement is reported and discussed.

5 pages, 3 figures

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• Beating the channel capacity limit for linear photonic superdense coding
• State-independent experimental test of quantum contextuality
• Hypergeometric-Gaussian Modes
• Pancharatnam-Berry phase optical elements for wavefront shaping in the visible domain: switchable helical modes generation
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Cited by in corpus (20)

• Electromagnetic Angular Momentum
• Electromagnetic Force and Momentum
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• Quantum and classical separability of spin-orbit laser modes
• Entanglement of Polarization and Orbital Angular Momentum
• Orbital angular momentum mixing in type II second harmonic generation
• Generation of tunable entanglement and violation of a Bell-like inequality between different degrees of freedom of a single photon
• Orbital angular momentum based intra- and inter- particle entangled states generated via a quantum dot source
• Hardy's paradox tested in the spin-orbit Hilbert space of single photons
• Resilience of orbital angular momentum qubits and effects on hybrid entanglement
• Entropy certification of a realistic QRNG based on single-particle entanglement
• Experimental Demonstration of a Quantum Controlled-SWAP Gate with Multiple Degrees of Freedom of a Single Photon
• Classical simulation of high-dimensional entanglement by non-separable angular--radial modes
• A robust approach for time-bin encoded photonic quantum information protocols
• Single-particle entanglement gives rise to truly nonlocal effects like single-particle steering
• Generation of the Complete Bell Basis via Hong-Ou-Mandel Interference
• Super-critical phasematching for photon pair generation in structured light modes
• Maximally entangled states of $(d,\infty )$ quantum systems: some numerical studies
• Observation of the full spiral spectrum of a light beam with single-pixel detection
• Polarization-based control of spin-orbit vector modes of light in biphoton interference