Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/321
Type: Artigo de periódico
Title: Nonclassical correlation in NMR quadrupolar systems
Author: SOARES-PINTO, D. O.
CELERI, L. C.
AUCCAISE, R.
FANCHINI, F. F.
DEAZEVEDO, E. R.
MAZIERO, J.
BONAGAMBA, T. J.
SERRA, R. M.
Abstract: The existence of quantum correlation (as revealed by quantum discord), other than entanglement and its role in quantum-information processing (QIP), is a current subject for discussion. In particular, it has been suggested that this nonclassical correlation may provide computational speedup for some quantum algorithms. In this regard, bulk nuclear magnetic resonance (NMR) has been successfully used as a test bench for many QIP implementations, although it has also been continuously criticized for not presenting entanglement in most of the systems used so far. In this paper, we report a theoretical and experimental study on the dynamics of quantum and classical correlations in an NMR quadrupolar system. We present a method for computing the correlations from experimental NMR deviation-density matrices and show that, given the action of the nuclear-spin environment, the relaxation produces a monotonic time decay in the correlations. Although the experimental realizations were performed in a specific quadrupolar system, the main results presented here can be applied to whichever system uses a deviation-density matrix formalism.
Country: Estados Unidos
Editor: AMER PHYSICAL SOC
Citation: PHYSICAL REVIEW A, v.81, n.6, 2010
Rights: fechado
Identifier DOI: 10.1103/PhysRevA.81.062118
Address: http://apps.isiknowledge.com/InboundService.do?Func=Frame&product=WOS&action=retrieve&SrcApp=EndNote&UT=000278874000002&Init=Yes&SrcAuth=ResearchSoft&mode=FullRecord
http://dx.doi.org/10.1103/PhysRevA.81.062118
Date Issue: 2010
Appears in Collections:IFGW - Artigos e Materiais de Revistas Científicas

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