Observable quantity
In physics, particularly in quantum physics, a system observable is a measurable operator, or gauge, where the property of the system state can be determined by some sequence of physical operations. For example, these operations might involve submitting the system to various electromagnetic fields and eventually reading a value off some gauge. In systems governed by classical mechanics, any experimentally observable value can be shown to be given by a real-valued function on the set of all possible system states.
Physically meaningful observables must also satisfy transformation laws which relate observations performed by different observers in different frames of reference. These transformation laws are automorphisms of the state space, that is bijective transformations which preserve some mathematical property.

This is an excerpt from the article Observable quantity from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.
The article Observable quantity at en.wikipedia.org was accessed 6 times in the last 30 days. (as of: 02/09/2014)
Images on Observable quantity
Preview image:
Original:
Search results from Google and Bing
3
1
1
observable - definition of observable by…
ob·serv·a·ble (b-zûr v-b l) adj. 1. Possible to observe: observable phenomena; an observable change in demeanor. See Synonyms at noticeable. 2.
www.thefreedictionary.com/observable
1
>30
2
Observable - Wikipedia, the free encyclopedia
Since the eigenvalue of an observable represents a real physical quantity for that particular dynamical variable, then we must conclude that there is no largest ...
en.wikipedia.org/wiki/Observable
2
>30
3
Observable (quantum computation) - The Free Dictionary
Definition of Observable (quantum computation) in the Online Dictionary. ... that can be observed or measured directly, as distinguished from a quantity, such as ...
www.thefreedictionary.com/Observable+(quantum+computation)
4
>30
4
observable quantity - Encyclopedia - The Free Dictionary
You can put a sensor in the presence of the measurable quantity, and, as that quantity changes, the sensor puts out an analog signal, whose electronic ...
encyclopedia2.thefreedictionary.com/observable+quantity
5
>30
5
Observable quantity ( bzrvbl kwnd ) ( physics ) A measurable physical quantity.
6
>30
6
(1) In QM, every observable quantity (position, momentum, energy ...
(1) In QM, every Observable quantity (position, momentum, energy, etc.) is represented by an operator. This operator operates on the wave function. Thus the ...
physics.ucsd.edu/students/courses/spring2009/managed/physics2d/documents/Notes_on_eigenvalues_etc.pdf
7
>30
7
Observable1 The term observable has become the ... - PhilSci-Archive
The term observable has become the standard name in quantum me- chanics for what used to be called physical quantity or measurable quantity in classical ...
philsci-archive.pitt.edu/4109/1/ObservableBuschLahti.pdf
8
>30
8
observable physical quantity in relativity - Physics Forums
Oct 22, 2008 ... observable physical quantity in relativity in Special & General Relativity is being discussed at Physics Forums.
9
>30
9
Observables and Measurements in Quantum Mechanics
The term 'observable', while originally applied to the physical quantity of interest, is also applied to the associated Hermitean operator. Thus we talk, for instance, ...
physics.mq.edu.au/~jcresser/Phys301/Chapters/Chapter13.pdf
10
>30
10
Observable quantity synonym by Babylon's thesaurus
Synonym of Observable quantity: Wikipedia English - The Free Encyclopedia Observable In physics, particularly in quantum physics, a system observable is a ...
thesaurus.babylon.com/observable%20quantity
Search results for "Observable quantity"
Observable quantity in science
[PDF]NNI-Form Quark Mass Matrix Expressed by the Observable ...
University of Shizuoka. Revised Version of. US-97-01 hep-ph/9701345. May 1997. NNI-Form Quark Mass Matrix. Expressed by the Observable Quantities.
Observable - Wikipedia, the free encyclopedia
Since the eigenvalue of an observable represents a real physical quantity for that ... S. Auyang, How is Quantum Field Theory Possible, Oxford University Press, ...
Renormalization of Coulomb interaction in graphene: computing ...
Feb 16, 2010... of Coulomb interaction in graphene: computing observable quantities ... divergences encountered in the physical quantities are associated to ...
SMART Objectives - Wayne State University
Observable means that somebody can see or hear (physically observe) someone doing ... and defines the objective using assessable terms (quantity, quality, ...
Quantum Mechanics (Stanford Encyclopedia of Philosophy)
Nov 29, 2000 ... A physical quantity is a mutually exclusive and jointly exhaustive family ... the term 'observable' is used interchangeably with 'physical quantity', and ...... Mechanics and Experience, Cambridge, MA: Harvard University Press.
[PDF]What Is the Effect of Observable Information Quantity ... - IEEE Xplore
School of Control Science and Engineering, Shandong University, Jinan 250061, P. R. China ... On the other hand, the observable information quantity.
[PDF]Observable1 The term observable has become the ... - PhilSci-Archive
chanics for what used to be called physical quantity or measurable ... that observable on the quantum system prepared in the given state. .... University of York.
[PDF]PDF (318 KB) - World Scientific
EXPRESSED BY THE OBSERVABLE QUANTITIES. YOSHIO KOIDE*. Department of Physics, University of Shizuoka, 52-1 Yada, Shizuoka 422, Japan.
[PDF]Theoretical Relations among Observable Quantities in an ...
Hiroshima University, Takehara, Hiroshima-ken. (Received March ... cally the relations among observable quantities for various degrees of anisotropy within the ...
Economics Basics: Utility | Investopedia
Utility is an abstract concept rather than a concrete, Observable quantity. The units to which we assign an "amount" of utility, therefore, are arbitrary, representing ...
Books on the term Observable quantity
ESSENTIALS OF PHYSICS
SANJAY MORESHWAR WAGH, DILIP ABASAHEB DESHPANDE, 2012
In contrast to directly observable quantities, a quantity is indirectly observable if its value has to be necessarily inferred from those of ... Now, question arises as to which physical quantities are directly, and which ones are indirectly, observable.
Foundations of Risk Analysis
Terje Aven, 2012
The value of an Observable quantity is well defined as conventions and procedures exist expressing how to measure it. No ambiguity can be present. This is a requirement for a quantity to be defined as observable. Thus an Observable quantity ...
A Computable Universe: Understanding and Exploring Nature as ...
So, in a computable physical model the set S is a set of non-negative integers, and each Observable quantity is a function ... In order to avoid all ambiguity, we insist that observable quantities be defined operationally in computable physical  ...
Handbook of Quantum Logic and Quantum Structures: Quantum Structures
Kurt Engesser, Dov M. Gabbay, Daniel Lehmann, 2011
Suppose A is a self-adjoint operator on the Hilbert space H whose spectral measure is go, and that B is the Observable quantity and f the scaling of the experimental system EH given by A. Then for any state s that is not null, and any Borel ...
The Interpretation of Quantum Mechanics
Roland Omnès, 1994
This suggests looking for a generalization of Born's rule to apply to any Observable quantity. However, before considering this issue, it will be useful to find out what are these observable quantities, at least in a first approach. At the beginning of ...

Blog posts on the term
Observable quantity
Thermodynamics as a multistep relaxation process and the role of observables in different scales of quantities - CERN Document Server
In the first part of the paper, we introduce the concept of observable quantities associated with a macroinstrument measuring the density and temperature and with a microinstrument determining the radius of a molecule and its free path length, and also the relationship between these observable quantities. The concept of the number of degrees of freedom, which relates the observable quantities listed above, is generalized to the case of low temperatures. An analogy between the creation and annihilation operators for pairs (dimers) and the creation and annihilation operators for particles (molecules) is carried out. A generalization of the concept of a Bose condensate is introduced for classical molecules as an analog of an ideal liquid (without attraction). The negative pressure in the liquid is treated as holes (of exciton type) in the density of the Bose condensate. The phase transition gas-liquid is calculated for an ideal gas (without attraction). A comparison with experimental data is carried out. In the other part of the paper, we introduce the concept of new Observable quantity, namely, of a pair (a dimer), as a result of attraction between the nearest neighbors. We treat in a new way the concepts of Boyle temperature \$T_B\$ (as the temperature above which the dimers disappear) and of the critical temperature \$T_c\$ (below which the trimers and clusters are formed). The equation for the Zeno line is interpreted as the relation describing the dependence of the temperature on the density at which the dimers disappear. We calculate the maximal density of the liquid and also the maximal density of the holes. The law of corresponding states is derived as a result of an observation by a macrodevice which cannot distinguish between molecules of distinct gases, and a comparison of theoretical and experimental data is carried out. Maslov, V P
cds.cern.ch/record/1530795?ln=en
ObservableArray Push Consistency
Good day I am trying to figure out why these two are behaving differently. I am hoping someone out there might be able to help. I have a function: Code = function(code, description, quantity) { var self = this; self.
www.marshut.com/qvtrn/observablearray-push-consistency.html
Reacting to Changes in KnockoutJS: Choosing the Right Tool for the Right Job - Knock Me Out
When starting out with Knockout, it doesn’t take long before you encounter a situation where observables and the default bindings don’t quite solve …
www.knockmeout.net/2011/03/reacting-to-changes-in-knockoutjs.html
In cases where the whole entire measures as being dysfunctional Insanity Workout | 83China
Two Insanity Workout predominant measures thickening breast Insanity workout. In the event the full measures to always be disfunctional Insanity workout, may be looked into one half measures, while the discuss the second breast, thanks to Insanity workout go up extra weight.
www.83china.com/in-cases-where-the-whole-entire-measures-as-being-dysfunctional-insanity-workout.php
Have a Knockout.js Shopping Trip!!! | dotnetgeezer
KnockOut. js is full of cool features (and is my preference over something like Backbone.
www.harrissoft.co.uk/dotnetgeezer/?p=311
123
More cyclopaedia entries
12. Nukey
14. Nunera
33. OR52I2
34. OR56B4