Pre- and Post-selection paradoxes and contextuality in quantum mechanics
| dc.creator | Leifer, M. S. | |
| dc.creator | Spekkens, R. W. | |
| dc.date | 2004-12-23 | |
| dc.date | 2005-07-06 | |
| dc.date.accessioned | 2026-07-07T06:25:57Z | |
| dc.date.available | 2026-07-07T06:25:57Z | |
| dc.description | Many seemingly paradoxical effects are known in the predictions for outcomes of intermediate measurements made on pre- and post-selected quantum systems. Despite appearances, these effects do not demonstrate the impossibility of a noncontextual hidden variable theory, since an explanation in terms of measurement-disturbance is possible. Nonetheless, we show that for every paradoxical effect wherein all the pre- and post- selected probabilities are 0 or 1 and the pre- and post-selected states are nonorthogonal, there is an associated proof of contextuality. This proof is obtained by considering all the measurements involved in the paradoxical effect -- the pre-selection, the post-selection, and the alternative possible intermediate measurements -- as alternative possible measurements at a single time. | |
| dc.description | 5 pages, 1 figure. Submitted to Phys. Rev. Lett. v2.0 revised in the light of referee comments, results unchanged | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0412178 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0412178 | |
| dc.identifier | Phys. Rev. Lett. 95, 200405 (2005) | |
| dc.identifier | doi:10.1103/PhysRevLett.95.200405 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/96977 | |
| dc.subject | Quantum Physics | |
| dc.title | Pre- and Post-selection paradoxes and contextuality in quantum mechanics | |
| dc.type | text |