Multi-dimensional entanglement generation with multi-core optical fibers

Abstract

Trends in photonic quantum information follow closely the technical progress in classical optics and telecommunications. In this regard, advances in multiplexing optical communications channels have also been pursued for the generation of multi-dimensional quantum states (qudits), since their use is advantageous for several quantum information tasks. One current path leading in this direction is through the use of space-division multiplexing multi-core optical fibers, which provides a new platform for efficiently controlling path-encoded qudit states. Here we report on a parametric down-conversion source of entangled qudits that is fully based on (and therefore compatible with) state-of-the-art multi-core fiber technology. The source design uses modern multi-core fiber beam splitters to prepare the pump laser beam as well as measure the generated entangled state, achieving high spectral brightness while providing a stable architecture. In addition, it can be readily used with any core geometry, which is crucial since widespread standards for multi-core fibers in telecommunications have yet to be established. Our source represents an important step towards the compatibility of quantum communications with the next-generation optical networks.

9 pages, 7 figures

References in corpus (31)

• Space Division Multiplexing in Optical Fibres
• Bell nonlocality
• Steering, Entanglement, Nonlocality, and the EPR Paradox
• Security of quantum key distribution using d-level systems
• Universal Linear Optics
• Bell inequalities for arbitrarily high dimensional systems
• Multidimensional quantum entanglement with large-scale integrated optics
• One-sided Device-Independent Quantum Key Distribution: Security, feasibility, and the connection with steering
• Violations of local realism by two entangled quNits are stronger than for two qubits
• EPR Steering Inequalities from Entropic Uncertainty Relations
• Computational advantage from quantum-controlled ordering of gates
• High-Dimensional Quantum Key Distribution based on Multicore Fiber using Silicon Photonic Integrated Circuits
• Closing the detection loophole in Bell experiments using qudits
• Quantum key distribution with higher-order alphabets using spatially-encoded qudits
• Generation of maximally entangled states of qudits using twin photons
• Orbital angular momentum states enabling fiber-based high-dimensional quantum communication
• Measurements in two bases are sufficient for certifying high-dimensional entanglement
• Detection of entanglement in asymmetric quantum networks and multipartite quantum steering
• Quantum information processing with space-division multiplexing optical fibres
• Quantum randomness extraction for various levels of characterization of the devices
• High-dimensional decoy-state quantum key distribution over 0.3 km of multicore telecommunication optical fibers
• Optimal randomness certification in the quantum steering and prepare-and-measure scenarios
• Efficient generation of high-dimensional entanglement through multi-path downconversion
• Robust architecture for programmable universal unitaries
• Scalable fiber integrated source for higher-dimensional path-entangled photonic quNits
• Device-Independent Certification of a Nonprojective Qubit Measurement
• Stable transmission of high-dimensional quantum states over a 2 km multicore fiber
• High-dimensional quantum communication complexity beyond strategies based on Bell's theorem
• Experimental nonlocality-based randomness generation with non-projective measurements
• Experimental multipartite entanglement and randomness certification of the W state in the quantum steering scenario
• Higher dimensional communication complexity problems: classical protocols vs quantum ones based on Bell's Theorem or prepare-transmit-measure schemes

Cited by in corpus (12)

• High-Dimensional Pixel Entanglement: Efficient Generation and Certification
• A scheme for universal high-dimensional quantum computation with linear optics
• Experimental space-division multiplexed polarization-entanglement distribution through 12 paths of a multicore fiber
• Certification of a Nonprojective Qudit Measurement using Multiport Beamsplitters
• Energy-time and time-bin entanglement: past, present and future
• Non-Markovianity in High-Dimensional Open Quantum Systems using Next-generation Multicore Optical Fibers
• Minimum optical depth multiport interferometers for approximating arbitrary unitary operations and pure states
• Bosonic Indistinguishability-Dependent Contextuality
• Efficient Experimental Qudit State Estimation via Point Tomography
• Hybrid classical-quantum communication networks
• BIFROST: A First-Principles Model of Polarization Mode Dispersion in Optical Fiber
• Dispersion and entropy-like measures of multidimensional harmonic systems. Application to Rydberg states and high-dimensional oscillators