Observation of Genuine High-dimensional Multi-partite Non-locality in Entangled Photon States
arXiv:2505.10035 · doi:10.1038/s41467-025-59717-y
Abstract
Quantum information science has leaped forward with the exploration of high-dimensional quantum systems, offering greater potential than traditional qubits in quantum communication and quantum computing. To advance the field of high-dimensional quantum technology, a significant effort is underway to progressively enhance the entanglement dimension between two particles. An alternative effective strategy involves not only increasing the dimensionality but also expanding the number of particles that are entangled. We present an experimental study demonstrating multi-partite quantum non-locality beyond qubit constraints, thus moving into the realm of strongly entangled high-dimensional multi-particle quantum systems. In the experiment, quantum states were encoded in the path degree of freedom (DoF) and controlled via polarization, enabling efficient operations in a two-dimensional plane to prepare three- and four-particle Greenberger-Horne-Zeilinger (GHZ) states in three-level systems. Our experimental results reveal ways in which high-dimensional systems can surpass qubits in terms of violating local-hidden-variable theories. Our realization of multiple complex and high-quality entanglement technologies is an important primary step for more complex quantum computing and communication protocols.
References in corpus (45)
- Quantum entanglement
- The Security of Practical Quantum Key Distribution
- Quantum secret sharing
- Quantum computational advantage using photons
- Security of quantum key distribution using d-level systems
- Optical Quantum Computing
- Experimental entanglement of six photons in graph states
- Advances in High Dimensional Quantum Entanglement
- Experimental ten-photon entanglement
- Witnessing multipartite entanglement
- Qudits and high-dimensional quantum computing
- Observation of eight-photon entanglement
- 12-photon entanglement and scalable scattershot boson sampling with optimal entangled-photon pairs from parametric down-conversion
- Implementation of a Toffoli Gate with Superconducting Circuits
- A universal qudit quantum processor with trapped ions
- Entanglement Certification From Theory to Experiment
- Device independent quantum random number generation
- Experimental high-dimensional quantum teleportation
- Interface between path and OAM entanglement for high-dimensional photonic quantum information
- Measurements in two bases are sufficient for certifying high-dimensional entanglement
- Kochen-Specker Contextuality
- The structure of multidimensional entanglement in multipartite systems
- Experimental GHZ Entanglement beyond Qubits
- Distributed quantum phase estimation with entangled photons
- Indistinguishability of elementary systems as resource for quantum information processing
- Entanglement by Path Identity
- Experimental Three-Particle Quantum Nonlocality under Strict Locality Conditions
- Experimental high-dimensional Greenberger-Horne-Zeilinger entanglement with superconducting transmon qutrits
- Efficient generation of high-dimensional entanglement through multi-path downconversion
- Bounding the set of finite dimensional quantum correlations
- Quantum Experiments and Graphs: Multiparty States as coherent superpositions of Perfect Matchings
- Device-independent demonstration of genuine multipartite entanglement
- Pathways for entanglement based quantum communication in the face of high noise
- Enabling computation of correlation bounds for finite-dimensional quantum systems via symmetrisation
- Single-copy entanglement detection
- Quantum Experiments and Graphs III: High-Dimensional and Multi-Particle Entanglement
- Demonstrating the power of quantum computers, certification of highly entangled measurements and scalable quantum nonlocality
- Experimental creation of Multi-Photon High-Dimensional Layered Quantum States
- Entangling Bosons through Particle Indistinguishability and Spatial Overlap
- Preparation of multiphoton high-dimensional GHZ state
- Observation of stronger-than-binary correlations with entangled photonic qutrits
- Entangling three identical particles via spatial overlap
- Mermin inequalities for perfect correlations in many-qutrit systems
- Detecting the dimensionality of genuine multi-particle entanglement
- Shortcut to Multipartite Entanglement Generation: A Graph Approach to Boson Subtractions