dc.contributor |
Háskóli Íslands |
dc.contributor |
University of Iceland |
dc.contributor.author |
Zuppardo, Margherita |
dc.contributor.author |
Ganardi, Ray |
dc.contributor.author |
Miller, Marek |
dc.contributor.author |
Bandyopadhyay, Somshubhro |
dc.contributor.author |
Paterek, Tomasz |
dc.date.accessioned |
2020-05-04T15:57:23Z |
dc.date.available |
2020-05-04T15:57:23Z |
dc.date.issued |
2019-04-10 |
dc.identifier.citation |
Zuppardo, M., Ganardi, R., Miller, M., Bandyopadhyay, S., & Paterek, T. (2018). Entanglement gain in measurements with unknown results. ArXiv.org, 99(4), ArXiv.org, Jun 14, 2018. |
dc.identifier.issn |
2469-9926 |
dc.identifier.issn |
2469-9934 (eISSN) |
dc.identifier.uri |
https://hdl.handle.net/20.500.11815/1774 |
dc.description |
Publisher's version (útgefin grein) |
dc.description.abstract |
We characterize nonselective global projective measurements capable of increasing quantum entanglement between two particles. In particular, by choosing negativity to quantify entanglement, we show that entanglement of any pure nonmaximally entangled state can be improved in this way (but not of any mixed state) and we provide detailed analysis for two qubits. It is then shown that Markovian open system dynamics can only approximate such measurements, but this approximation converges exponentially fast as illustrated using the Araki-Żurek model. We conclude with numerical evidence that macroscopic bodies in a random pure state do not gain negativity in a random nonselective global measurement. |
dc.description.sponsorship |
We thank Michał Horodecki, Kavan Modi, Aby Philip,
and Somasundaram Sankaranarayanan for discussions. S.B.
thanks Anindita Banerjee and Saronath Halder for helpful discussions. This work is supported by Singapore Ministry of Education Academic Research Fund Tier 2 Project
No. MOE2015-T2-2-034. S.B. is supported, in part, by SERB Project No. EMR/2015/002373. M.Z. is supported by the
Icelandic Research Fund, Grant No. 163082-051. Some of
the computations were performed on resources provided by
the Icelandic High Performance Computing Centre at the
University of Iceland. |
dc.format.extent |
042319 |
dc.language.iso |
en |
dc.publisher |
American Physical Society (APS) |
dc.relation.ispartofseries |
Physical Review A;99(4) |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Quantum entanglement |
dc.subject |
Global measurements |
dc.subject |
Two particles |
dc.subject |
Skammtafræði |
dc.subject |
Atóm |
dc.title |
Entanglement gain in measurements with unknown results |
dc.type |
info:eu-repo/semantics/article |
dcterms.license |
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
dc.description.version |
Peer Reviewed |
dc.identifier.journal |
Physical Review A |
dc.identifier.doi |
10.1103/PhysRevA.99.042319 |
dc.contributor.department |
Raunvísindastofnun (HÍ) |
dc.contributor.department |
Science Institute (UI) |
dc.contributor.school |
Verkfræði- og náttúruvísindasvið (HÍ) |
dc.contributor.school |
School of Engineering and Natural Sciences (UI) |