Quantum information and special relativity
| dc.creator | Peres, Asher | |
| dc.creator | Terno, Daniel R. | |
| dc.date | 2003-01-15 | |
| dc.date.accessioned | 2026-07-07T06:05:52Z | |
| dc.date.available | 2026-07-07T06:05:52Z | |
| dc.description | Relativistic effects affect nearly all notions of quantum information theory. The vacuum behaves as a noisy channel, even if the detectors are perfect. The standard definition of a reduced density matrix fails for photon polarization because the transversality condition behaves like a superselection rule. We can however define an effective reduced density matrix which corresponds to a restricted class of positive operator-valued measures. There are no pure photon qubits, and no exactly orthogonal qubit states. Reduced density matrices for the spin of massive particles are well-defined, but are not covariant under Lorentz transformations. The spin entropy is not a relativistic scalar and has no invariant meaning. The distinguishability of quantum signals and their entanglement depend on the relative motion of observers. | |
| dc.description | RevTex, 6 pages with one figure. Proceedings of TH-2002, Paris, 2002 | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0301065 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0301065 | |
| dc.identifier | Int. J. Quant. Info. 1, 225 (2003) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/90788 | |
| dc.subject | Quantum Physics | |
| dc.title | Quantum information and special relativity | |
| dc.type | text |