Details
| Original language | English |
|---|---|
| Article number | 220401 |
| Journal | Physical review letters |
| Volume | 122 |
| Issue number | 22 |
| Publication status | Published - 7 Jun 2019 |
Abstract
It is well known that the violation of a local uncertainty relation can be used as an indicator for the presence of entanglement. Unfortunately, the practical use of these nonlinear witnesses has been limited to few special cases in the past. However, new methods for computing uncertainty bounds have become available. Here we report on an experimental implementation of uncertainty-based entanglement witnesses, benchmarked in a regime dominated by strong local noise. We combine the new computational method with a local noise tomography in order to design noise-adapted entanglement witnesses. This proof-of-principle experiment shows that quantum noise can be successfully handled by a fully quantum model in order to enhance the ability to detect entanglement.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 122, No. 22, 220401, 07.06.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Entanglement Detection by Violations of Noisy Uncertainty Relations: A Proof of Principle
AU - Zhao, Yuan Yuan
AU - Xiang, Guo Yong
AU - Hu, Xiao Min
AU - Liu, Bi Heng
AU - Li, Chuan Feng
AU - Guo, Guang Can
AU - Schwonnek, René
AU - Wolf, Ramona
N1 - Funding information: R. S. and R. W. thank Reinhard F. Werner, Tobias J. Osborne, and Deniz E. Stiegemann for fruitful discussions and critically reading of our Letter. Y. Y. Z. thanks Yu Guo’s help in the experiment. R. S. and R. W. also acknowledge the financial support given by the RTG 1991, the CRC 1227 DQ-mat, and the cluster of excellence EXC 2123 QuantumFrontiers funded by the DFG, the collaborative research projects Q.com-Q and Q.Link.X funded by the BMBF and the Asian Office of Aerospace RD Grant No. FA2386-18-1-4033. The work at USTC is supported by the National Natural Science Foundation of China (Grants No. 11574291, No. 11774334, No. 61327901, No. 11874345, and No. 11774335), the National Natural Science Foundation for the Youth of China (Grant No. 11804410), the China Postdoctoral Science Foundation (Grant No. 2017M620260), the National Key Research and Development Program of China (Grant No. 2017YFA0304100), and the Key Research Program of Frontier Sciences, CAS (Grant No. QYZDY-SSW-SLH003), Anhui Initiative in Quantum Information Technologies.
PY - 2019/6/7
Y1 - 2019/6/7
N2 - It is well known that the violation of a local uncertainty relation can be used as an indicator for the presence of entanglement. Unfortunately, the practical use of these nonlinear witnesses has been limited to few special cases in the past. However, new methods for computing uncertainty bounds have become available. Here we report on an experimental implementation of uncertainty-based entanglement witnesses, benchmarked in a regime dominated by strong local noise. We combine the new computational method with a local noise tomography in order to design noise-adapted entanglement witnesses. This proof-of-principle experiment shows that quantum noise can be successfully handled by a fully quantum model in order to enhance the ability to detect entanglement.
AB - It is well known that the violation of a local uncertainty relation can be used as an indicator for the presence of entanglement. Unfortunately, the practical use of these nonlinear witnesses has been limited to few special cases in the past. However, new methods for computing uncertainty bounds have become available. Here we report on an experimental implementation of uncertainty-based entanglement witnesses, benchmarked in a regime dominated by strong local noise. We combine the new computational method with a local noise tomography in order to design noise-adapted entanglement witnesses. This proof-of-principle experiment shows that quantum noise can be successfully handled by a fully quantum model in order to enhance the ability to detect entanglement.
UR - http://www.scopus.com/inward/record.url?scp=85066922204&partnerID=8YFLogxK
U2 - 10.48550/arXiv.1810.05588
DO - 10.48550/arXiv.1810.05588
M3 - Article
C2 - 31283283
AN - SCOPUS:85066922204
VL - 122
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 22
M1 - 220401
ER -