Title :
Operational significance of discord consumption
Author :
Symul, Thomas ; Chrzanowski, Helen M. ; Assad, Syed ; Lam, Ping Koy ; Ralph, Timothy C. ; Gu, Ming ; Modi, Kavan ; Vedral, Vlatko
Author_Institution :
Centre of Excellence for Quantum Comput. & Commun. Technol., Australian Nat. Univ., Canberra, ACT, Australia
Abstract :
For many years, the notion of quantum correlations was equated with the notion of quantum entanglement. The wide range of quantum protocols whose extra-powers over classical protocol were shown to originate from quantum entanglement mostly motivated this. For example, it was shown that for certain class of problems, a quantum computer could provide exponential speed-up over its classical counterpart, given that it relied on quantum entangled resources. Recently, however, the requirement of possessing entanglement to perform efficient quantum computation has been questioned both theoretically [1] and experimentally [2]. It appears that a non-classical quantity called quantum discord [3] is all that is required.
Keywords :
quantum computing; quantum entanglement; quantum optics; nonclassical quantity; quantum computation; quantum correlations; quantum discord consumption; quantum entanglement; quantum protocols; Correlation; Encoding; Entropy; Mutual information; Protocols; Quantum computing; Quantum entanglement;
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/IQEC), 2013 Conference on and International Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4799-0593-5
DOI :
10.1109/CLEOE-IQEC.2013.6801704