Quantum discord of SU(2)invariant states

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Çakmak, Barış and Gedik, Zafer (2013) Quantum discord of SU(2)invariant states. Journal of Physics A: Mathematical and Theoretical, 46 . ISSN 1751-8113 (Print) 1751-8121 (Online)

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Official URL: http://dx.doi.org/10.1088/1751-8113/46/46/465302


We have analytically calculated the quantum discord for a system composed of spin-j and spin-1/2 subsystems possessing SU(2) symmetry. We have compared our results with the quantum discord of states having similar symmetries and seen that in our case the amount of quantum discord is much higher. Moreover, using the well-known entanglement properties of these states, we have also compared their quantum discord with entanglement. Although the system under consideration is almost separable throughout its parameter space as j increases, we have seen that the discord content remains significantly large. Investigating the quantum discord in SU(2) invariant states may find application in quantum computation protocols that utilize quantum discord as a resource since they arise in many real physical systems.

Item Type:Article
Additional Information:Article Number: 465302
Subjects:Q Science > QC Physics > QC170 Atomic physics. Quantum theory.
ID Code:22896
Deposited By:Zafer Gedik
Deposited On:21 Jan 2014 15:15
Last Modified:01 Aug 2019 14:44

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