Subspace preserving completely positive maps
| dc.creator | Åberg, Johan | |
| dc.date | 2003-02-25 | |
| dc.date | 2003-12-16 | |
| dc.date.accessioned | 2026-07-07T06:24:54Z | |
| dc.date.available | 2026-07-07T06:24:54Z | |
| dc.description | A class of quantum channels and completely positive maps (CPMs) are introduced and investigated. These, which we call subspace preserving (SP) CPMs has, in the case of trace preserving CPMs, a simple interpretation as those which preserve probability weights on a given orthogonal sum decomposition of the Hilbert space of a quantum system. Several equivalent characterizations of SP CPMs are proved and an explicit construction of all SP CPMs, is provided. For a subclass of the SP channels a construction in terms of joint unitary evolution with an ancilla system, is presented. | |
| dc.description | References added | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0302180 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0302180 | |
| dc.identifier | Annals of Physics Vol. 313, p. 326 (2004) | |
| dc.identifier | doi:10.1016/j.aop.2004.04.013 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/96703 | |
| dc.subject | Quantum Physics | |
| dc.title | Subspace preserving completely positive maps | |
| dc.type | text |