Test of Genuine Multipartite Nonlocality

• URL: http://arxiv.org/abs/2201.12753v2
• Date: Sun, 6 Feb 2022 08:21:51 GMT
• Title: Test of Genuine Multipartite Nonlocality
• Authors: Ya-Li Mao, Zheng-Da Li, Sixia Yu and Jingyun Fan
• Abstract summary: Bell nonlocality of a bipartite system is counter-intuitive, multipartite nonlocality in our many-body world turns out to be even more so. Recent theoretical study reveals that genuine multipartite nonlocal correlations cannot be explained by any causal theory involving fewer-partite nonclassical resources and global shared randomness.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: While Bell nonlocality of a bipartite system is counter-intuitive, multipartite nonlocality in our many-body world turns out to be even more so. Recent theoretical study reveals in a theory-agnostic manner that genuine multipartite nonlocal correlations cannot be explained by any causal theory involving fewer-partite nonclassical resources and global shared randomness. Here we provide a Bell-type inequality as a test for genuine multipartite nonlocality in network by exploiting a matrix representation of the causal structure of a multipartite system. We further present experimental demonstrations that both four-photon GHZ state and generalized four-photon GHZ state significantly violate the inequality, i.e., the observed four-partite correlations resist explanations involving three-way nonlocal resources subject to local operations and common shared randomenss, hence confirming that nature is boundless multipartite nonlocal.

Related papers

• Simultaneous Verification of Genuine Multipartite Nonlocality and Full Network Nonlocality [1.2557385810845298]
  We propose the first method to verify both types of nonlocality simultaneously in a single experiment. We observe both types of nonlocality in a high fidelity photonic quantum network by violating a single network Bell inequality.
  arXiv  Detail & Related papers  (2024-07-20T13:17:23Z)
• Unextendibility, uncompletability, and many-copy indistinguishable ensembles [77.34726150561087]
  We study unextendibility, uncompletability and analyze their connections to many-copy indistinguishable ensembles. We report a class of multipartite many-copy indistinguishable ensembles for which local indistinguishability property increases with decreasing mixedness.
  arXiv  Detail & Related papers  (2023-03-30T16:16:41Z)
• Nonlocality under Computational Assumptions [51.020610614131186]
  A set of correlations is said to be nonlocal if it cannot be reproduced by spacelike-separated parties sharing randomness and performing local operations. We show that there exist (efficient) local producing measurements that cannot be reproduced through randomness and quantum-time computation.
  arXiv  Detail & Related papers  (2023-03-03T16:53:30Z)
• Experimental full network nonlocality with independent sources and strict locality constraints [59.541438315564854]
  Nonlocality in networks gives rise to phenomena radically different from that in standard Bell scenarios. We experimentally observe full network nonlocality in a network where the source-independence, locality, and measurement-independence loopholes are closed. Our experiment violates known inequalities characterizing non-full network nonlocal correlations by over five standard deviations.
  arXiv  Detail & Related papers  (2023-02-05T20:03:58Z)
• Proofs of network quantum nonlocality aided by machine learning [68.8204255655161]
  We show that the family of quantum triangle distributions of [DOI40103/PhysRevLett.123.140] did not admit triangle-local models in a larger range than the original proof. We produce a large collection of network Bell inequalities for the triangle scenario with binary outcomes, which are of independent interest.
  arXiv  Detail & Related papers  (2022-03-30T18:00:00Z)
• Multipartite spatial entanglement generated by concurrent nonlinear processes [91.3755431537592]
  Continuous variables multipartite entanglement is a key resource for quantum technologies. This work considers the multipartite entanglement generated in separated spatial modes of the same light beam by three different parametric sources.
  arXiv  Detail & Related papers  (2021-11-09T17:15:13Z)
• No Bipartite-Nonlocal Causal Theory Can Explain Nature's Correlations [0.0]
  We show that some tripartite quantum correlations are inexplicable by any causal theory involving bipartite nonclassical common causes and unlimited shared randomness. This constitutes a device-independent proof that Nature's nonlocality is fundamentally at least tripartite in every conceivable physical theory.
  arXiv  Detail & Related papers  (2021-05-19T20:05:57Z)
• Any Physical Theory of Nature Must Be Boundlessly Multipartite Nonlocal [0.0]
  We show that noisy N-partite GHZ quantum states as well as the 3-partite W quantum state can produce such correlations. This proves, if the operational predictions of quantum theory are correct, that Nature's nonlocality must be boundlessly multipartite in any causal GPT.
  arXiv  Detail & Related papers  (2021-05-19T20:05:55Z)
• Full network nonlocality [68.8204255655161]
  We introduce the concept of full network nonlocality, which describes correlations that necessitate all links in a network to distribute nonlocal resources. We show that the most well-known network Bell test does not witness full network nonlocality. More generally, we point out that established methods for analysing local and theory-independent correlations in networks can be combined in order to deduce sufficient conditions for full network nonlocality.
  arXiv  Detail & Related papers  (2021-05-19T18:00:02Z)
• Genuine multipartite nonlocality is intrinsic to quantum networks [0.5156484100374058]
  We derive sufficient conditions for entanglement to give rise to genuine multipartite nonlocality in networks. Our results pave the way towards feasible manners of generating genuine multipartite nonlocality using any connected network.
  arXiv  Detail & Related papers  (2020-04-03T18:00:14Z)
• Unbounded Bell violations for quantum genuine multipartite non-locality [0.5156484100374058]
  Bell inequalities by measurements on quantum states give rise to the phenomenon of quantum non-locality. We show that while in the so-called correlation scenario the relative violation of bilocal Bell inequalities by quantum resources is bounded, it does not grow arbitrarily with the number of inputs. We identify Bell functionals that take the form of non-local games for which the ratio of the quantum and bilocal values grows unboundedly as a function of the number of inputs and outputs.
  arXiv  Detail & Related papers  (2020-02-28T09:28:27Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.