Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/64885
Type: Artigo de periódico
Title: Entanglement versus quantum discord in two coupled double quantum dots
Author: Fanchini, FF
Castelano, LK
Caldeira, AO
Abstract: We study the dynamics of quantum correlations of two coupled double quantum dots containing two excess electrons. The dissipation is included through the contact with an oscillator bath. We solve the Redfield master equation in order to determine the dynamics of the quantum discord (QD) and the entanglement of formation (EoF). Based on our results, we find that the QD is more resistant to dissipation than the EoF for such a system. We observe that this characteristic is related to whether the oscillator bath is common to both qubits or not and to the form of the interaction Hamiltonian. Moreover, our results show that the QD might be finite, even for higher temperatures in the asymptotic limit.
Country: Inglaterra
Editor: Iop Publishing Ltd
Rights: aberto
Identifier DOI: 10.1088/1367-2630/12/7/073009
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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