| Issue |
EPL
Volume 123, Number 5, September 2018
|
|
|---|---|---|
| Article Number | 50004 | |
| Number of page(s) | 7 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/123/50004 | |
| Published online | 05 October 2018 | |
Characterization of the nonlinear qubit map using the probability parametrization
1 Moscow Institute of Physics and Technology (State University) - Institutskii per. 9, Dolgoprudnii, Moscow Region 141700, Russia
2 P.N. Lebedev Physical Institute, Russian Academy of Sciences - Leninskii Prospect 53, Moscow 119991, Russia
Received: 9 June 2018
Accepted: 10 September 2018
Considering a qubit density matrix in probability parametrization we demonstrated that the nonlinear transform of the matrix 
provides the state with the density either chaotic one or practically pure one. An example of a qubit is studied in detail.
PACS: 03.65.Ca – Formalism / 03.65.Wj – State reconstruction, quantum tomography / 03.67.-a – Quantum information
© EPLA, 2018
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