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Full counting statistics of quantum point contacts with time-dependent transparency
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Zhang, Jin, Sherkunov, Y., d'Ambrumenil, N. and Muzykantskii, B. (2009) Full counting statistics of quantum point contacts with time-dependent transparency. Physical Review B (Condensed Matter and Materials Physics), Vol.80 (No.24). Article no. 245308. doi:10.1103/PhysRevB.80.245308 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.80.245308
Abstract
We analyze the zero-temperature full counting statistics (FCS) for the charge transfer across a biased tunnel junction. We find the FCS from the eigenvalues of the density matrix of outgoing states of one lead. In the general case of a general time-dependent bias and time-dependent transparency we solve for these eigenvalues numerically. We report the FCS for the case of a step pulse applied between the leads and a constant barrier transparency (this case is equivalent to Fermi-edge singularity problem). We have also studied combinations of a time-dependent barrier transparency and biases between the leads. In particular, we look at protocols which excite the minimal number of excitations for a given charge transfer (low-noise electron source) and protocols which maximize entanglement of charge states.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1098-0121 | ||||
| Official Date: | December 2009 | ||||
| Dates: |
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| Volume: | Vol.80 | ||||
| Number: | No.24 | ||||
| Number of Pages: | 12 | ||||
| Page Range: | Article no. 245308 | ||||
| DOI: | 10.1103/PhysRevB.80.245308 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Grant number: | EP/D065135/1 (EPSRC) |
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