Ekert, A K and Alves, C M and Oi, D K L and Horodecki, M and Horodecki, P and Kwek, L C (2002) Direct estimations of linear and nonlinear functionals of a quantum state. Physical Review Letters, 88 (21). -. ISSN 0031-9007
Full text not available in this repository. (Request a copy from the Strathclyde author)Abstract
We present a simple quantum network, based on the controlled-SWAP gate, that can extract certain properties of quantum states without recourse to quantum tomography. It can be used as a basic building block for direct quantum estimations of both linear and nonlinear functionals of any density operator. The network has many potential applications ranging from purity tests and eigenvalue estimations to direct characterization of some properties of quantum channels. Experimental realizations of the proposed network are within the reach of quantum technology that is currently being developed.
| Item type: | Article |
|---|---|
| ID code: | 10155 |
| Keywords: | quantum states, quantum tomography, quantum estimations, linear, nonlinear, Physics |
| Subjects: | Science > Physics |
| Department: | Faculty of Science > Physics |
| Related URLs: | |
| Depositing user: | Strathprints Administrator |
| Date Deposited: | 27 Oct 2011 19:37 |
| Last modified: | 12 Mar 2012 10:53 |
| URI: | http://strathprints.strath.ac.uk/id/eprint/10155 |
Actions (login required)
| View Item |