dc.contributor.author | Pal, Karoly F. | |
dc.contributor.author | Tóth, Géza | |
dc.contributor.author | Bene, Erika | |
dc.contributor.author | Vértesi, Tamás | |
dc.date.accessioned | 2021-06-11T10:20:38Z | |
dc.date.available | 2021-06-11T10:20:38Z | |
dc.date.issued | 2021-05-10 | |
dc.identifier.citation | Physical Review Research 3(2) : (2021) // Article ID 023101 | es_ES |
dc.identifier.issn | 2643-1564 | |
dc.identifier.uri | http://hdl.handle.net/10810/51843 | |
dc.description.abstract | Bipartite entangled quantum states with a positive partial transpose (PPT), i.e., PPT entangled states, are usually considered very weakly entangled. Since no pure entanglement can be distilled from them, they are also called bound entangled. In this paper, we present two classes of (2d x 2d)-dimensional PPT entangled states for any d >= 2 which outperform all separable states in metrology significantly. We present strong evidence that our states provide the maximal metrological gain achievable by PPT states for a given system size. When the dimension d goes to infinity, the metrological gain of these states becomes maximal and equals the metrological gain of a pair of maximally entangled qubits. Thus, we argue that our states could be called "PPT singlets." | es_ES |
dc.description.sponsorship | We acknowledge the support of the EU (COST Action CA15220, QuantERA CEBBEC, QuantERA eDICT), the Spanish MCIU (Grant No. PCI2018-092896), the Spanish Ministry of Science, Innovation and Universities and the European Regional Development Fund FEDER through Grant No. PGC2018-101355-B-I00 (MCIU/AEI/FEDER, EU), the Basque Government (Grant No. IT986-16), and the National Research, Development and Innovation Office NKFIH (Grant No. K124351, No. KH129601, No. KH125096, and No. 2019-2.1.7-ERA-NET-2020-00003). We thank the "Frontline" Research Excellence Programme of the NKFIH (Grant No. KKP133827). G.T. is grateful for a Bessel Research Award of the Humboldt Foundation. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | American Physical Society | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICIU/PCI2018-092896 | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN/PGC2018-101355-B-I00 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.subject | distillation | es_ES |
dc.subject | separability | es_ES |
dc.subject | criterion | es_ES |
dc.subject | limits | es_ES |
dc.title | Bound Entangled Singlet-Like States for Quantum Metrology | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (CC BY 4.0) | es_ES |
dc.rights.holder | Atribución 3.0 España | * |
dc.relation.publisherversion | https://journals-aps-org.ehu.idm.oclc.org/prresearch/abstract/10.1103/PhysRevResearch.3.023101 | es_ES |
dc.identifier.doi | 10.1103/PhysRevResearch.3.023101 | |
dc.departamentoes | Física teórica e historia de la ciencia | es_ES |
dc.departamentoeu | Fisika teorikoa eta zientziaren historia | es_ES |