Entanglement of Polarization and Orbital Angular Momentum

Abstract

We investigate two-photon entangled states using two important degrees of freedom of the electromagnetic field, namely orbital angular momentum (OAM) and spin angular momentum. For photons propagating in the same direction we apply the idea of $\text{entanglement duality}$ and develop schemes to do $\text{entanglement sorting}$ based either on OAM or polarization. In each case the entanglement is tested using appropriate witnesses. We finally present generalizations of these ideas to three- and four-photon entangled states.

6 pages, 3 figures

References in corpus (5)

• Entanglement detection
• Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
• Spin-orbit hybrid entanglement of photons and quantum contextuality
• Beating the standard quantum limit: Phase super-sensitivity of N-photon interferometers
• A Duality in Entanglement Enabling a Test of Quantum Indistinguishability Unaffected by Interactions

Cited by in corpus (5)

• Polarization-Encrypted Orbital Angular Momentum Multiplexed Metasurface Holography
• Hyperentanglement purification for two-photon six-qubit quantum systems
• Error-detected generation and complete analysis of hyperentangled Bell states for photons assisted by quantum-dot spins in double-sided optical microcavities
• Spin in Compton scattering with pronounced polarization dynamics
• How to observe duality in entanglement of two distinguishable particles?