Entanglement and transport through correlated quantum dot |
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Authors: | A Rycerz |
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Institution: | (1) Instituut-Lorentz, Universiteit Leiden, P.O. Box 9506, 2300 RA Leiden, The Netherlands and Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059, Kraków, Poland |
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Abstract: | We study quantum entanglement in a single-level quantum dot in the
linear-response regime.
The results show, that the maximal quantum value of the conductance
2e2/h not always match the maximal entanglement.
The pairwise entanglement between the quantum dot and the nearest atom of the
lead is also analyzed by utilizing the Wootters formula
for charge and spin degrees of freedom separately.
The coexistence of zero concurrence and the maximal conductance is observed
for low values of the dot-lead hybridization.
Moreover, the pairwise concurrence vanish simultaneously for charge and
spin degrees of freedom, when the Kondo resonance is present in the system.
The values of a Kondo temperature, corresponding to the zero-concurrence
boundary, are also provided. |
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Keywords: | 73 63 -b Electronic transport in nanoscale materials and structures 03 65 Ud Entanglement and quantum nonlocality 03 67 Mn Entanglement production characterization and manipulation |
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