English

Classical Limits and Contextuality in a Scenario of Multiple Observers

Quantum Physics 2020-12-16 v3

Abstract

Contextuality is regarded as a non-classical feature, challenging our everyday intuition; quantum contextuality is currently seen as a resource for many applications in quantum computation, being responsible for quantum advantage over classical analogs. In our work, we adapt the NN-cycle scenarios with odd NN to multiple independent observers which measure the system sequentially. We analyze the possibility of violating the inequalities as a function of the number of observers and under different measurement protocols. We then reinterpret the results as an open quantum system where the environment is divided into fragments. In this context, the results show the emergence of non-contextuality in such a setting, bringing together the quantum behavior to our classical experience. We then compare such emergence of non-contextuality with that of objectivity under the `Environment as a Witness paradigm'.

Keywords

Cite

@article{arxiv.1811.00615,
  title  = {Classical Limits and Contextuality in a Scenario of Multiple Observers},
  author = {Roberto D. Baldijao and Marcelo Terra Cunha},
  journal= {arXiv preprint arXiv:1811.00615},
  year   = {2020}
}

Comments

Extensively rewritten, while main results are maintained. Discussion of open systems and relation to emergence of objectivity is concentrated on section IV. 7+8 pages, 4+1 figures. Submitted to PRA

R2 v1 2026-06-23T05:01:21.711Z