Locking and unlocking of quantum nonlocality without entanglement in local discrimination of quantum states

• URL: http://arxiv.org/abs/2112.01139v2
• Date: Fri, 11 Mar 2022 00:25:14 GMT
• Title: Locking and unlocking of quantum nonlocality without entanglement in local discrimination of quantum states
• Authors: Donghoon Ha and Jeong San Kim
• Abstract summary: We show that the post-measurement information can be used to lock as well as unlock the occurrence of NLWE. Our results can provide a useful application for hiding or sharing information based on non-orthogonal separable states.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The phenomenon of nonlocality without entanglement(NLWE) arises in discriminating multi-party quantum separable states. Recently, it has been found that the post-measurement information about the prepared subensemble can lock or unlock NLWE in minimum-error discrimination of non-orthogonal separable states. Thus, it is natural to ask whether the availability of the post-measurement information can influence on the occurrence of NLWE even in other state-discrimination strategies. Here, we show that the post-measurement information can be used to lock as well as unlock the occurrence of NLWE in terms of optimal unambiguous discrimination. Our results can provide a useful application for hiding or sharing information based on non-orthogonal separable states.

Related papers

• Non-destructive Local Discrimination of Entangled Quantum States [5.44412471005479]
  We show a gap between local and nonlocal strategies in a quantum state discrimination task under a non-destructiveness condition. For a set of maximally entangled states, the success probability of the proposed task using local operations and classical communications is completely suppressed. We construct a non-destructive and adaptive strategy to achieve perfect discrimination of maximally entangled states.
  arXiv  Detail & Related papers  (2023-08-30T13:46:18Z)
• Local Inaccessibility of Random Classical Information : Conditional Nonlocality demands Entanglement [0.0]
  Discrimination of quantum states under local operations and classical communication (LOCC) is an intriguing question. We introduce a framework for input-dependent local quantum state discrimination, which we call local random authentication (LRA) The results highlight a completely new aspect of the interplay between the security of information in a network and quantum entanglement under the LOCC paradigm.
  arXiv  Detail & Related papers  (2023-07-17T12:58:46Z)
• 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)
• Suppressing Amplitude Damping in Trapped Ions: Discrete Weak Measurements for a Non-unitary Probabilistic Noise Filter [62.997667081978825]
  We introduce a low-overhead protocol to reverse this degradation. We present two trapped-ion schemes for the implementation of a non-unitary probabilistic filter against amplitude damping noise. This filter can be understood as a protocol for single-copy quasi-distillation.
  arXiv  Detail & Related papers  (2022-09-06T18:18:41Z)
• Annihilating and creating nonlocality without entanglement by postmeasurement information [0.0]
  Nonlocality without entanglement (NLWE) is a nonlocal quantum phenomenon that arises in separable state discrimination. We show that the availability of the postmeasurement information about the prepared subensemble can affect the occurrence of NLWE.
  arXiv  Detail & Related papers  (2021-09-09T11:07:34Z)
• Quantum nonlocality without entanglement depending on nonzero prior probabilities in optimal unambiguous discrimination [0.0]
  Nonlocality without entanglement (NLWE) is a nonlocal phenomenon that occurs in quantum state discrimination of multipartite separable states. In this paper, we show that even in optimal discrimination, the occurrence of NLWE can depend on nonzero prior probabilities.
  arXiv  Detail & Related papers  (2021-05-26T01:13:03Z)
• Genuine activation of nonlocality: From locally available to locally hidden information [13.939388417767136]
  Quantum nonlocality has different manifestations that, in general, are revealed by local measurements of parts of a composite system. We show that there exist sets that are locally distinguishable but without local redundancy. We suggest an application, namely, local hiding of information, that allows us to locally hide locally available information without losing any part.
  arXiv  Detail & Related papers  (2021-04-24T12:02:48Z)
• Quantum Discrimination of Two Noisy Displaced Number States [68.2727599930504]
  We first consider the quantum discrimination of two noiseless displaced number states. We then address the problem of discriminating between two noisy displaced number states.
  arXiv  Detail & Related papers  (2020-12-09T16:56:16Z)
• Unambiguous discrimination of Fermionic states through local operations and classical communication [68.8204255655161]
  The paper studies unambiguous discrimination of Fermionic states through local operations and classical communication (LOCC) We show that it is not always possible to distinguish two Fermionic states through LOCC unambiguously with the same success probability as if global measurements were allowed.
  arXiv  Detail & Related papers  (2020-09-11T21:08:52Z)
• Quantum noise protects quantum classifiers against adversaries [120.08771960032033]
  Noise in quantum information processing is often viewed as a disruptive and difficult-to-avoid feature, especially in near-term quantum technologies. We show that by taking advantage of depolarisation noise in quantum circuits for classification, a robustness bound against adversaries can be derived. This is the first quantum protocol that can be used against the most general adversaries.
  arXiv  Detail & Related papers  (2020-03-20T17:56:14Z)
• Fermionic state discrimination by local operations and classical communication [68.8204255655161]
  Local operations and classical communication (LOCC) discrimination between two bipartite pure states of fermionic systems is studied. We show that, contrary to the case of quantum systems, for fermionic systems it is generally not possible to achieve the ideal state discrimination performances.
  arXiv  Detail & Related papers  (2020-02-24T12:25:36Z)

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.