dc.contributor.author | Jacobs, Kurt | |
dc.date.accessioned | 2017-05-03T12:56:10Z | |
dc.date.available | 2017-05-03T12:56:10Z | |
dc.date.issued | 2005 | |
dc.date.modified | 2007-04-13T08:08:23Z | |
dc.identifier.issn | 10502947 | |
dc.identifier.uri | http://hdl.handle.net/10072/4906 | |
dc.description.abstract | When various observers obtain information in an independent fashion about a classical system, there is a simple rule which allows them to pool their knowledge, and this requires only the states-of-knowledge of the respective observers. Here we derive an equivalent quantum formula. While its realm of applicability is necessarily more limited, it does apply to a large class of measurements, and we show explicitly for a single qubit that it satisfies the intuitive notions of what it means to pool knowledge about a quantum system. This analysis also provides a physical interpretation for the trace of the product of two density matrices. | |
dc.description.peerreviewed | Yes | |
dc.description.publicationstatus | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | American Physical Soc. | |
dc.publisher.place | USA | |
dc.publisher.uri | https://journals.aps.org/pra/abstract/10.1103/PhysRevA.72.044101 | |
dc.relation.ispartofstudentpublication | N | |
dc.relation.ispartofpagefrom | 044101.1 | |
dc.relation.ispartofpageto | 044101.4 | |
dc.relation.ispartofjournal | Physical Review A | |
dc.relation.ispartofvolume | 72 | |
dc.rights.retention | Y | |
dc.subject.fieldofresearch | History and Archaeology | |
dc.subject.fieldofresearch | Mathematical Sciences | |
dc.subject.fieldofresearch | Physical Sciences | |
dc.subject.fieldofresearch | Chemical Sciences | |
dc.subject.fieldofresearchcode | 21 | |
dc.subject.fieldofresearchcode | 01 | |
dc.subject.fieldofresearchcode | 02 | |
dc.subject.fieldofresearchcode | 03 | |
dc.title | Simple formula for pooling knowledge about a quantum system | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
gro.faculty | Griffith Sciences, School of Natural Sciences | |
gro.rights.copyright | © 2005 American Physical Society. Reproduced in accordance with the copyright policy of the publisher. This journal is available online - use hypertext links. | |
gro.date.issued | 2005 | |
gro.hasfulltext | No Full Text | |
gro.griffith.author | Jacobs, Kurt A. | |