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dc.contributor.author
Colbeck, Roger
dc.contributor.author
Renner, Renato
dc.date.accessioned
2020-09-28T09:24:06Z
dc.date.available
2017-06-09T09:00:58Z
dc.date.available
2020-09-28T09:24:06Z
dc.date.issued
2010-05-27
dc.identifier.uri
http://hdl.handle.net/20.500.11850/29073
dc.description.abstract
According to quantum theory, measurements generate random outcomes, in stark contrast with classical mechanics. This raises the question of whether there could exist an extension of the theory which removes this indeterminism, as suspected by Einstein, Podolsky and Rosen (EPR). Although this has been shown to be impossible, existing results do not imply that the current theory is maximally informative. Here we ask the more general question of whether any improved predictions can be achieved by any extension of quantum theory. Under the assumption that measurements can be chosen freely, we answer this question in the negative: no extension of quantum theory can give more information about the outcomes of future measurements than quantum theory itself. Our result has significance for the foundations of quantum mechanics, as well as applications to tasks that exploit the inherent randomness in quantum theory, such as quantum cryptography.
en_US
dc.language.iso
en
en_US
dc.publisher
Cornell University
en_US
dc.title
No extension of quantum theory can have improved predictive power
en_US
dc.title.alternative
Quantum theory cannot be extended
en_US
dc.type
Working Paper
ethz.journal.title
arXiv
ethz.pages.start
1005.5173
en_US
ethz.size
13 p.
en_US
ethz.grant
Information-theoretic methods for physics
en_US
ethz.grant
Generalized (quantum) information theory
en_US
ethz.identifier.arxiv
1005.5173
ethz.publication.place
Ithaca, NY
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02511 - Institut für Theoretische Physik / Institute for Theoretical Physics::03781 - Renner, Renato / Renner, Renato
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02511 - Institut für Theoretische Physik / Institute for Theoretical Physics::03781 - Renner, Renato / Renner, Renato
ethz.grant.agreementno
135048
ethz.grant.agreementno
258932
ethz.grant.fundername
SNF
ethz.grant.fundername
EC
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100000780
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.grant.program
FP7
ethz.relation.isPreviousVersionOf
10.3929/ethz-b-000039623
ethz.date.deposited
2017-06-09T09:01:13Z
ethz.source
ECIT
ethz.identifier.importid
imp59364d93c7b2592926
ethz.ecitpid
pub:48437
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2017-07-14T17:23:12Z
ethz.rosetta.lastUpdated
2021-02-15T17:37:00Z
ethz.rosetta.versionExported
true
ethz.COinS
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