Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1212.2427 · Brazilian Journal of Physics

Quantum Discord in Nuclear Magnetic Resonance Systems at Room Temperature

J. Maziero, R. Auccaise, L. C. Céleri, D. O. Soares-Pinto, E. R. deAzevedo, Tito José Bonagamba, R. S. Sarthour, I. S. Oliveira, R. M. Serra

Published Feb 25, 2013• 21 citations
arXivHTMLPDF
DOI
10.1007/s13538-013-0118-1

Related papers

ChemInform Abstract: Quantum Discord in Nuclear Magnetic Resonance Systems at Room Temperature

Jonas Maziero, R. Auccaise, Lucas C. Céleri +6 more

ChemInform•Feb 26, 2013•1 citation

Quantum Discord in Nuclear Magnetic Resonance Systems at Room Temperature

Jonas Maziero, R. Auccaise, Lucas C. Céleri +6 more

"We review the theoretical and the experimental researches aimed at quantifying or identifying quantum correlations in liquid-state nuclear magnetic resonance (NMR) systems at room temperature. We first overview, at the formal level, a method to determine the quantum discord and its classical counterpart in systems described by a deviation matrix. Next, we describe an experimental implementation of that method. Previous theoretical analysis of quantum discord decoherence had predicted the time dependence of the discord to change suddenly under the influence of phase noise. The experiment attests to the robustness of the effect, sufficient to confirm the theoretical prediction even under the additional influence of a thermal environment. Finally, we discuss an observable witness for the quantumness of correlations in two-qubit systems and its first NMR implementation. Should the nature, not the amount, of the correlation be under scrutiny, the witness offers the most attractive alternative."

•Jan 1, 2013•14 citations

Long-range quantum discord in critical spin systems

Jonas Maziero, Lucas C. Céleri, Roberto M. Serra +1 more

arXiv:1012.5926•Physics Letters A•Mar 16, 2012•70 citations

Quantum discord in spin systems with dipole–dipole interaction

E. I. Kuznetsova, Mikhail A. Yurischev

arXiv:1301.5394•Quantum Information Processing•Aug 8, 2013•25 citations

Experimentally Witnessing the Quantumness of Correlations

R. Auccaise, Jonas Maziero, Lucas C. Céleri +6 more

The quantification of quantum correlations (other than entanglement) usually entails labored numerical optimization procedures also demanding quantum state tomographic methods. Thus it is interesting to have a laboratory friendly witness for the nature of correlations. In this Letter we report a direct experimental implementation of such a witness in a room temperature nuclear magnetic resonance system. In our experiment the nature of correlations is revealed by performing only few local magnetization measurements. We also compared the witness results with those for the symmetric quantum discord and we obtained a fairly good agreement.

arXiv:1104.1596•Physical Review Letters•Aug 9, 2011•93 citations

Quantum discord in a three-spin system in an external magnetic field

Serge I. Doronin, E. I. Kuznetsova, Edward B. Fel’dman

Theoretical and Mathematical Physics•Nov 1, 2014•3 citations
"We review the theoretical and the experimental researches aimed at quantifying or identifying quantum correlations in liquid-state nuclear magnetic resonance (NMR) systems at room temperature. We first overview, at the formal level, a method to determine the quantum discord and its classical counterpart in systems described by a deviation matrix. Next, we describe an experimental implementation of that method. Previous theoretical analysis of quantum discord decoherence had predicted the time dependence of the discord to change suddenly under the influence of phase noise. The experiment attests to the robustness of the effect, sufficient to confirm the theoretical prediction even under the additional influence of a thermal environment. Finally, we discuss an observable witness for the quantumness of correlations in two-qubit systems and its first NMR implementation. Should the nature, not the amount, of the correlation be under scrutiny, the witness offers the most attractive alternative."
The quantification of quantum correlations (other than entanglement) usually entails labored numerical optimization procedures also demanding quantum state tomographic methods. Thus it is interesting to have a laboratory friendly witness for the nature of correlations. In this Letter we report a direct experimental implementation of such a witness in a room temperature nuclear magnetic resonance system. In our experiment the nature of correlations is revealed by performing only few local magnetization measurements. We also compared the witness results with those for the symmetric quantum discord and we obtained a fairly good agreement.