Superadditivity of Quantum Channel Capacity

dc.authorid Ozdemir, Sahin Kaya/0000-0002-2625-3992
dc.authorscopusid 52564111600
dc.authorscopusid 35569075200
dc.authorscopusid 7003264515
dc.authorscopusid 22961789000
dc.authorwosid Ozaydin, Fatih/F-9338-2014
dc.authorwosid Ozdemir, Sahin Kaya/Y-9338-2019
dc.contributor.author Ozaydin, Fatih
dc.contributor.author Ozdemir, Sahin Kaya
dc.contributor.author Koashi, Masato
dc.contributor.author Imoto, Nobuyuki
dc.date.accessioned 2024-05-25T11:21:32Z
dc.date.available 2024-05-25T11:21:32Z
dc.date.issued 2012
dc.department Okan University en_US
dc.department-temp [Ozaydin, Fatih] Okan Univ, Dept Comp Engn, Istanbul, Turkey; [Ozdemir, Sahin Kaya] Washington Univ, Dept Elect Engn Syst, St Louis, MO USA; [Koashi, Masato] Univ Tokyo, Photon Sci Ctr, Tokyo, Japan; [Imoto, Nobuyuki] Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn, Osaka, Japan en_US
dc.description Ozdemir, Sahin Kaya/0000-0002-2625-3992 en_US
dc.description.abstract Superadditivity of quantum capacity of communication channels is one of the most interesting findings of the field. Yard and Smith, finding a relation between the private capacity and the assisted quantum capacity, showed a striking example of superadditivity, i.e. two channels of zero quantum capacity could achieve a positive quantum capacity when used together [1]. The four dimensional channels they used are a 50% erasure channel (therefore zero quantum capacity, due to no-cloning theorem) and a Horodecki channel (again zero quantum capacity due to incapability of sharing free entanglement). In this work we present the more general cases of superadditivity. Directly calculating the lower bounds of joint quantum capacities without using the relation between private capacity and assisted quantum capacity, we examine scenarios considering erasure channels of arbitrary probabilities and different Horodecki channels, and discuss the roles of degradability and anti-degradability as well as the role of the private capacity in superadditivity. We also derive an upper bound for the joint quantum capacity for the superactivation case. en_US
dc.description.sponsorship Monbusho-MEXT scholarship en_US
dc.description.sponsorship F. Ozaydin acknowledges Monbusho-MEXT scholarship. en_US
dc.identifier.citationcount 0
dc.identifier.doi 10.1063/1.4751625
dc.identifier.endpage 350 en_US
dc.identifier.isbn 9780735410855
dc.identifier.issn 0094-243X
dc.identifier.scopus 2-s2.0-84875540770
dc.identifier.scopusquality Q4
dc.identifier.startpage 346 en_US
dc.identifier.uri https://doi.org/10.1063/1.4751625
dc.identifier.uri https://hdl.handle.net/20.500.14517/587
dc.identifier.volume 1476 en_US
dc.identifier.wos WOS:000309528800071
dc.language.iso en
dc.publisher Amer inst Physics en_US
dc.relation.ispartof 2nd International Congress on Advances in Applied Physics and Materials Science (APMAS) -- APR 26-29, 2012 -- Antalya, TURKEY en_US
dc.relation.ispartofseries AIP Conference Proceedings
dc.relation.publicationcategory Konferans Öğesi - Uluslararası - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/openAccess en_US
dc.scopus.citedbyCount 0
dc.subject Superactivation en_US
dc.subject superadditivity en_US
dc.subject quantum capacity en_US
dc.title Superadditivity of Quantum Channel Capacity en_US
dc.type Conference Object en_US
dc.wos.citedbyCount 0

Files