Quantum entanglement of electrons in a biased 1D twoprobe device
Abstract
Electronic quantum entanglement between the central chain and the two electrodes in an infinite onedimensional twoprobe device system is studied. The entanglement entropy is calculated employing the nonequilibrium Green's function method in the tightbinding model based on the relation between the correlation matrix and the von Neumann entropy. By extending the entropy to nonequilibrium cases, we have studied the scaling behavior when a voltage bias is applied between the two electrodes. The entropy usually decreases with the bias and may jump up when a quasistate in the chain aligns in energy with the band edges in the electrodes. Oddeven effect is observed due to the symmetry of the chain.
 Publication:

arXiv eprints
 Pub Date:
 March 2016
 arXiv:
 arXiv:1603.00153
 Bibcode:
 2016arXiv160300153L
 Keywords:

 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 14 pages, 4 figures