Current correlations in the interacting Cooper-pair beam-splitter

Physics – Condensed Matter – Mesoscale and Nanoscale Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

10.1103/PhysRevB.85.035419

We propose an approach allowing the computation of currents and their correlations in interacting multiterminal mesoscopic systems involving quantum dots coupled to normal and/or superconducting leads. The formalism relies on the expression of branching currents and noise crossed correlations in terms of one- and two-particle Green's functions for the dots electrons, which are then evaluated self-consistently within a conserving approximation. We then apply this to the Cooper-pair beam-splitter setup recently proposed [L. Hofstetter et al. Nature (London) 461 960 (2009); Phys. Rev. Lett. 107 136801 (2011); L. G. Herrmann et al. Phys. Rev. Lett. 104 026801 (2010)], which we model as a double quantum dot with weak interactions, connected to a superconducting lead and two normal ones. Our method not only enables us to take into account a local repulsive interaction on the dots, but also to study its competition with the direct tunneling between dots. Our results suggest that even a weak Coulomb repulsion tends to favor positive current cross correlations in the antisymmetric regime (where the dots have opposite energies with respect to the superconducting chemical potential).

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Current correlations in the interacting Cooper-pair beam-splitter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Current correlations in the interacting Cooper-pair beam-splitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current correlations in the interacting Cooper-pair beam-splitter will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-60152

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.