Full counting statistics of quantum point contacts with time-dependent transparency
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. ISSN 1098-0121Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevB.80.245308
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 > Physics|
|Journal or Publication Title:||Physical Review B (Condensed Matter and Materials Physics)|
|Publisher:||American Physical Society|
|Official Date:||December 2009|
|Number of Pages:||12|
|Page Range:||Article no. 245308|
|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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