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Schrödinger-cat states: size classification based on evolution or dissipation
KTH, Tidigare Institutioner, Mikroelektronik och informationsteknik, IMIT.ORCID-id: 0000-0002-2082-9583
KTH, Tidigare Institutioner, Mikroelektronik och informationsteknik, IMIT.
2004 (engelsk)Inngår i: Proceedings of SPIE - The International Society for Optical Engineering: Vol. 5468 / [ed] Heszler P; Abbott D; GeaBanacloche JR; Hemmer PR, 2004, s. 335-343Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

The issue of estimating how "macroscopic" a superposition state is, can be addressed by analysing the rapidity of the state's evolution under a preferred observable, compared to that of the states forming the superposition. This fast evolution. which arises from the larger dispersion of the superposition state for the preferred operator, also represents a useful characteristic for interferometric applications. This approach can be compared to others in which a superposition's macroscopality is estimated in terms of the fragility to dissipation.

sted, utgiver, år, opplag, sider
2004. s. 335-343
Serie
Proceedings of SPIE, ISSN 0277-786X
Emneord [en]
Disconnectivity; Interference; Macroscopic superpositions; Schrödinger-cat states; Dispersion (waves); Interferometry; Mathematical models; Microwaves; Photons; Probability distributions; Thermodynamics; Quantum theory
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-7281DOI: 10.1117/12.547048ISI: 000223225300035Scopus ID: 2-s2.0-4344689602ISBN: 0-8194-5391-9 (tryckt)OAI: oai:DiVA.org:kth-7281DiVA, id: diva2:12243
Konferanse
Fluctuations and Noise in Photonics and Quantum Optics II; Maspalomas; 26-28 May 2004, Maspalomas, Spain
Merknad
QC 20100816Tilgjengelig fra: 2007-06-04 Laget: 2007-06-04 Sist oppdatert: 2011-11-02bibliografisk kontrollert
Inngår i avhandling
1. Studies in plausibility theory, with applications to physics
Åpne denne publikasjonen i ny fane eller vindu >>Studies in plausibility theory, with applications to physics
2007 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

The discipline usually called `probability theory' can be seen as the theory which describes and sets standard norms to the way we reason about plausibility. From this point of view, this `plausibility theory' is a province of logic, and the following informal proportion subsists:

plausibility theory is to the common notion of `plausibility', as deductive logic is to the common notion of `truth'.

Some studies in plausibility theory are here offered. An alternative view and mathematical formalism for the problem of induction (the prediction of uncertain events from similar, certain ones) is presented. It is also shown how from plausibility theory one can derive a mathematical framework, based on convex geometry, for the description of the predictive properties of physical theories. Within this framework, problems like state assignment - for any physical theory - find simple and clear algorithms, numerical examples of which are given for three-level quantum systems. Plausibility theory also gives insights on various fashionable theorems, like Bell’s theorem, and various fashionable `paradoxes', like Gibbs' paradox.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2007. s. xv, 105
Serie
Trita-ICT/MAP ; 2007:6
Emneord
Bayesian probability theory, quantum theory, state assignment, state estimation
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-4421 (URN)978-91-7178-688-3 (ISBN)
Disputas
2007-06-12, D, Forum, Isafjordsgatan 39, Kista, 10:00
Opponent
Veileder
Merknad
QC 20100816Tilgjengelig fra: 2007-06-04 Laget: 2007-06-04 Sist oppdatert: 2010-08-16bibliografisk kontrollert

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