Unbounded sequential multipartite nonlocality via violation of Mermin inequality

• URL: http://arxiv.org/abs/2406.11466v1
• Date: Mon, 17 Jun 2024 12:28:16 GMT
• Title: Unbounded sequential multipartite nonlocality via violation of Mermin inequality
• Authors: Bang-Zhu Shen, Mao-Sheng Li,
• Abstract summary: Quantum nonlocality is a significant feature in quantum information theory. We study sequential nonlocality in systems comprising more parties and observer chains. Our results suggest that increasing the number of subsystems may enable more observer chains to detect nonlocality alongside single observers.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum nonlocality is a significant feature in quantum information theory, prompting recent investigations into the potential reuse of post-measurement states to uncover nonlocality among sequentially measuring observers. While prior studies primarily focused on bipartite or tripartite systems and observers with one chain, such as multiple Bobs with a single Alice or multiple Charlies with a single Alice and Bob, our work extends beyond this framework. We explore sequential nonlocality in systems comprising more parties and observer chains. Our findings reveal that in $n$-partite systems, regardless of whether it is a single-chain or double-chain scenario, there exist unbounded sequential observers capable of detecting nonlocality through violations of the Mermin inequality. In contrast to the conjecture that sequential Bell nonlocality cannot manifest with multiple Alices and Bobs in bipartite systems (i.e., the double-chain setting)[Phys. Rev. A 104, L060201 (2021)], our results suggest that increasing the number of subsystems may enable more observer chains to detect nonlocality alongside single observers. Our study advances research on sequential nonlocality, providing valuable insights into its detection across diverse scenarios.

Related papers

• Topological transitions in quantum jump dynamics: Hidden exceptional points [45.58759752275849]
  Phenomena associated with exceptional points (EPs) have been extensively studied in relation to superconducting circuits. We consider a monitored three level system and find multiple EPs in the Lindbladian eigenvalues considered as functions of a counting field. We identify dynamical observables affected by these transitions and demonstrate how the underlying topology can be recovered from experimentally measured quantum jump distributions.
  arXiv  Detail & Related papers  (2024-08-09T18:00:02Z)
• Sharing preparation contextuality in Bell experiment by arbitrary pair of sequential observers [0.0]
  We study the sharing of non-locality and preparation contextuality based on a bipartite Bell inequality. We show that while non-locality can be shared only by first pair of the sequential observers, the preparation contextuality can be shared by arbitrary pair of independent sequential observers at both ends.
  arXiv  Detail & Related papers  (2023-11-08T10:00:17Z)
• Bell inequalities with overlapping measurements [52.81011822909395]
  We study Bell inequalities where measurements of different parties can have overlap. This allows to accommodate problems in quantum information. The scenarios considered show an interesting behaviour with respect to Hilbert space dimension, overlap, and symmetry.
  arXiv  Detail & Related papers  (2023-03-03T18:11:05Z)
• Detection of Beyond-Quantum Non-locality based on Standard Local Quantum Observables [46.03321798937856]
  We show that device independent detection cannot distinguish beyond-quantum non-local states from standard quantum states. This paper gives a device dependent detection based on local observables to distinguish any beyond-quantum non-local state from all standard quantum states.
  arXiv  Detail & Related papers  (2023-01-10T20:19:34Z)
• 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)
• Robustness of non-locality in many-body open quantum systems [0.0]
  Non-locality consists in the existence of non-classical correlations between local measurements. We show that non-local correlations are present, can be detected and might be robust against noise in many-body open quantum systems.
  arXiv  Detail & Related papers  (2022-02-24T13:05:36Z)
• Recycled entanglement detection by arbitrarily many sequential and independent pairs of observers [0.0]
  We investigate the witnessing of two-qubit entangled states by sequential and independent pairs of observers. We find that a two-qubit entangled state can be used to witness entanglement arbitrarily many times.
  arXiv  Detail & Related papers  (2022-01-07T18:37:49Z)
• Both qubits of the singlet state can be steered simultaneously by multiple independent observers via sequential measurement [10.918291217470799]
  A subsystem in entangled pairs can share nonlocality with multiple observers in sequence. It is found that the two qubits in singlet state can be simultaneously steered by two sequential observers.
  arXiv  Detail & Related papers  (2021-02-24T09:37:55Z)
• Einstein-Podolsky-Rosen Steering in Two-sided Sequential Measurements with One Entangled Pair [5.180965147147337]
  Non-locality and quantum measurement are two fundamental topics in quantum theory. Non-locality sharing among multiple observers is predicted and experimentally observed. Double EPR steering can be demonstrated simultaneously while double Bell-CHSH inequalityviolations are shown to be impossible.
  arXiv  Detail & Related papers  (2021-02-04T11:32:14Z)
• On the complex behaviour of the density in composite quantum systems [62.997667081978825]
  We study how the probability of presence of a particle is distributed between the two parts of a composite fermionic system. We prove that it is a non-perturbative property and we find out a large/small coupling constant duality. Inspired by the proof of KAM theorem, we are able to deal with this problem by introducing a cut-off in energies that eliminates these small denominators.
  arXiv  Detail & Related papers  (2020-04-14T21:41:15Z)
• Einselection from incompatible decoherence channels [62.997667081978825]
  We analyze an open quantum dynamics inspired by CQED experiments with two non-commuting Lindblad operators. We show that Fock states remain the most robust states to decoherence up to a critical coupling.
  arXiv  Detail & Related papers  (2020-01-29T14:15:19Z)

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.