Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1862424 | Physics Letters A | 2008 | 4 Pages |
Abstract
We study the entanglement degree of electron pairs emitted from an s-wave superconductor, which couples to two normal leads via a single-level quantum dot. Within the framework of scattering matrix theory, the concurrence is used to quantify the entanglement. And the result shows that the entanglement degree is generally influenced by the initial separation of the two electrons in a Cooper pair and the normal transmission eigenvalues T1T1, T2T2. But it is only determined by the eigenvalues in the tunnelling limit, T1,T2≪1T1,T2≪1, what is more, it is measurable.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Li-Ling Zhou, Zhao-Yang Zeng,