Nonlocal quantum correlations under amplitude damping decoherence

Tanumoy Pramanik, Young-Wook Cho, Sang-Wook Han, Sang-Yun Lee, Sung Moon, and Yong-Su Kim
Phys. Rev. A 100, 042311 – Published 14 October 2019

Abstract

Different nonlocal quantum correlations of entanglement, steering and Bell nonlocality are defined with the help of local hidden state and local hidden variable models. Considering their unique roles in quantum information processing, it is of importance to understand the individual nonlocal quantum correlation as well as their relationship. Here, we investigate the effects of amplitude damping decoherence on different nonlocal quantum correlations. In particular, we have theoretically and experimentally shown that the entanglement sudden death phenomenon is distinct from those of steering and Bell nonlocality. In our scenario, we found that all the initial states present sudden death of steering and Bell nonlocality, while only some of the states show entanglement sudden death. These results suggest that the environmental effect can be different for different nonlocal quantum correlations and, thus, it provides distinct operational interpretations of different quantum correlations.

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  • Received 3 March 2019

DOI:https://doi.org/10.1103/PhysRevA.100.042311

©2019 American Physical Society

Physics Subject Headings (PhySH)

General PhysicsQuantum Information, Science & Technology

Authors & Affiliations

Tanumoy Pramanik1,*, Young-Wook Cho1, Sang-Wook Han1, Sang-Yun Lee1, Sung Moon1,2, and Yong-Su Kim1,2,†

  • 1Center for Quantum Information, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
  • 2Division of Nano & Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea

  • *tanu.pra99@gmail.com
  • yong-su.kim@kist.re.kr

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Vol. 100, Iss. 4 — October 2019

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