Abstract
We study, in the context of quantum information and quantum communication, a configuration of devices that includes (1) a source of some unknown bipartite quantum state that is claimed to be the Bell state Φ+ and (2) two spatially separated but otherwise unknown measurement apparatus, one on each side, that are each claimed to execute an orthogonal measurement at an angle ε {-π/8, 0, π/8} that is chosen by the user. We show that, if the nine distinct probability distributions that are generated by the self checking configuration, one for each pair of angles, are consistent with the specifications, the source and the two measurement apparatus are guaranteed to be identical to the claimed specifications up to a local change of basis on each side. We discuss the connection with quantum cryptography.
| Original language | English |
|---|---|
| Pages (from-to) | 273-286 |
| Number of pages | 14 |
| Journal | Quantum Information and Computation |
| Volume | 4 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jul 2004 |
Keywords
- Quantum cryptography
- Quantum information
- Self testing
- Violation of locality