Brand ao, FGSL;
Oppenheim, J;
(2012)
The quantum one-time pad in the presence of an eavesdropper.
Physical Review Letters
, 108
(4)
, Article 040504. 10.1103/PhysRevLett.108.040504.
![[thumbnail of 1362134.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/application_pdf.png) Preview |
PDF
1362134.pdf Download (119kB) |
Abstract
A classical one-time pad allows two parties to send private messages over a public classical channel—an eavesdropper who intercepts the communication learns nothing about the message. A quantum one-time pad is a shared quantum state which allows two parties to send private messages or private quantum states over a public quantum channel. If the eavesdropper intercepts the quantum communication she learns nothing about the message. In the classical case, a one-time pad can be created using shared and partially private correlations. Here we consider the quantum case in the presence of an eavesdropper, and find the single-letter formula for the rate at which the two parties can send messages using a general quantum state as a quantum one-time pad. Surprisingly, the formula coincides with the distillable entanglement assisted by a symmetric channel, an important quantity in quantum information theory, but which lacked a clear operational meaning.
| Type: | Article |
|---|---|
| Title: | The quantum one-time pad in the presence of an eavesdropper |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.108.040504 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.108.040504 |
| Language: | English |
| Additional information: | © 2012 American Physical Society |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1362134 |
Loading...
Loading...Loading...| 1. |  United States | 3 |
| 2. |  Saudi Arabia | 2 |
| 3. |  China | 2 |
| 4. |  Germany | 1 |
| 5. |  United Kingdom | 1 |
| 6. |  Turkey | 1 |
| 7. |  Russian Federation | 1 |
| 8. |  Belgium | 1 |
| 9. |  India | 1 |
| 10. |  Canada | 1 |
Archive Staff Only
 |
View Item |
