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Quantum dissonance in chiral graphene nanoribbons.
Xiao-Dong Tan1, Xiu-Bao Kang1, Li-Min Zhao1
1School of Science, Henan Institute of Engineering, Zhengzhou 451191, People's Republic of China.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|February 15, 2019
Summary
Quantum dissonance exists in chiral graphene nanoribbons
Area of Science:
- Condensed Matter Physics
- Quantum Information Science
Background:
- Chiral graphene nanoribbons (CGNRs) exhibit unique edge states.
- Understanding quantum correlations in these systems is crucial.
Purpose of the Study:
- Investigate quantum dissonance (Q) in CGNR edge spins.
- Analyze the impact of various parameters on Q.
Main Methods:
- Utilized an effective spin-ladder model.
- Studied spins thermalized with a reservoir at temperature T.
Main Results:
- Quantum dissonance is prevalent in Wannier edge states.
- Q exists even when quantum entanglement (E) is zero for intra-edge spins.
- Q remains constant for entangled edge spin pairs.
- Q decays with increasing temperature, sensitive to on-site Coulomb repulsion (U).
Conclusions:
- Conjectured a relationship between quantum dissonance, entanglement, and quantum discord (D): Q ≤ D - E.
- Quantum correlations in CGNRs are complex and parameter-dependent.
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