Hybrid-Entanglement in Continuous Variable Systems

Abstract

Entanglement is one of the most fascinating features arising from quantum-mechanics and of great importance for quantum information science. Of particular interest are so-called hybrid-entangled states which have the intriguing property that they contain entanglement between different degrees of freedom (DOFs). However, most of the current continuous variable systems only exploit one DOF and therefore do not involve such highly complex states. We break this barrier and demonstrate that one can exploit squeezed cylindrically polarized optical modes to generate continuous variable states exhibiting entanglement between the spatial and polarization DOF. We show an experimental realization of these novel kind of states by quantum squeezing an azimuthally polarized mode with the help of a specially tailored photonic crystal fiber.

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• Vectorial light-matter interaction -- exploring spatially structured complex light fields
• Hybrid Entangled Entanglement in Vector Vortex Beams
• Implementing Quantum Walks Using Orbital Angular Momentum of Classical Light
• Quantum and classical separability of spin-orbit laser modes
• Cylindrical vector beams for rapid polarization-dependent measurements in atomic systems
• Genuine Multipartite Entanglement Trends in Gapless-gapped Transitions of Quantum Spin Systems
• Tripartite entanglement: Foundations and applications
• Classifying, quantifying, and witnessing qudit-qumode hybrid entanglement
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• Birefringence and dispersion of cylindrically polarized modes in nanobore photonic crystal fiber
• Radially and azimuthally polarized non paraxial Bessel beams made simple
• Experimental violation of a Bell-like inequality with optical vortex beams
• Formulation of the twisted-light--matter interaction at the phase singularity: beams with strong magnetic fields
• Topological phase structure of vector vortex beams
• Cylindrically polarized Bessel-Gauss beams
• Bell inequality violation by entangled single photon states generated from a laser, a LED or a Halogen lamp
• Experimental generation of amplitude squeezed vector beams
• Magneto-Electric Response of Quantum Structures Driven by Optical Vector Beams
• Thermal Fluctuations Enhance Order-from-Disorder of Quantum Correlations in Quenched Disordered Spin Models
• Single-mode squeezing in arbitrary spatial modes
• Generalized q-plates and novel vector beams
• Cylindrically Polarized Nondiffracting Optical Pulses
• Tools for detecting entanglement between different degrees of freedom in quadrature squeezed cylindrically polarized modes
• Quantum Uncertainty in the Beam Width of Spatial Optical Modes
• Beam focusing and reduction of quantum uncertainty in width at the few-photon level via multi-spatial-mode squeezing
• Entanglement generation via diffraction
• Entanglement growth via splitting of a few thermal quanta
• Ergodicity from Nonergodicity in Quantum Correlations of Low-dimensional Spin Systems
• Generalized and multiplexed $q$-plates: experimental implementation
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• Detecting the spatial quantum uncertainty of bosonic systems
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