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Bounding the Amount of Entanglement from Witness Operators

Sun, Liang Liang ; Zhou, Xiang ; Tavakoli, Armin LU ; Xu, Zhen Peng and Yu, Sixia (2024) In Physical Review Letters 132(11).
Abstract

We present an approach to estimate the operational distinguishability between an entangled state and any separable state directly from measuring an entanglement witness. We show that this estimation also implies bounds on a variety of other well-known entanglement quantifiers. This approach for entanglement estimation is then extended to both the measurement-device-independent scenario and the fully device-independent scenario, where we obtain nontrivial but suboptimal bounds. The procedure requires no numerical optimization and is easy to compute. It offers ways for experimenters to not only detect, but also quantify, entanglement from the standard entanglement witness procedure.

Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
132
issue
11
article number
110204
publisher
American Physical Society
external identifiers
  • pmid:38563922
  • scopus:85187556288
ISSN
0031-9007
DOI
10.1103/PhysRevLett.132.110204
language
English
LU publication?
yes
id
876e058b-c1b6-42f2-ad01-be4562f9ffff
date added to LUP
2024-04-03 13:28:54
date last changed
2024-04-19 15:40:40
@article{876e058b-c1b6-42f2-ad01-be4562f9ffff,
  abstract     = {{<p>We present an approach to estimate the operational distinguishability between an entangled state and any separable state directly from measuring an entanglement witness. We show that this estimation also implies bounds on a variety of other well-known entanglement quantifiers. This approach for entanglement estimation is then extended to both the measurement-device-independent scenario and the fully device-independent scenario, where we obtain nontrivial but suboptimal bounds. The procedure requires no numerical optimization and is easy to compute. It offers ways for experimenters to not only detect, but also quantify, entanglement from the standard entanglement witness procedure.</p>}},
  author       = {{Sun, Liang Liang and Zhou, Xiang and Tavakoli, Armin and Xu, Zhen Peng and Yu, Sixia}},
  issn         = {{0031-9007}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{11}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Bounding the Amount of Entanglement from Witness Operators}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.132.110204}},
  doi          = {{10.1103/PhysRevLett.132.110204}},
  volume       = {{132}},
  year         = {{2024}},
}