About: Counterfactual definiteness

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In quantum mechanics, counterfactual definiteness (CFD) is the ability to speak "meaningfully" of the definiteness of the results of measurements that have not been performed (i.e., the ability to assume the existence of objects, and properties of objects, even when they have not been measured). The term "counterfactual definiteness" is used in discussions of physics calculations, especially those related to the phenomenon called quantum entanglement and those related to the Bell inequalities. In such discussions "meaningfully" means the ability to treat these unmeasured results on an equal footing with measured results in statistical calculations. It is this (sometimes assumed but unstated) aspect of counterfactual definiteness that is of direct relevance to physics and mathematical model

Attributes	Values
rdf:type	disease
rdfs:label	Counterfactual definiteness (en) 反事实确定性 (zh)
rdfs:comment	在量子力学中，反事实确定性（英語：counterfactual definiteness，简称CFD）是指“有意义地”谈论尚未进行的测量的结果的确定性的能力（即假设物体的存在和物体的属性的能力，即使它们尚未被测量）。术语“反事实确定性”被用于物理计算的讨论，尤其是与量子纠缠现象以及贝尔不等式相关的讨论。在此类讨论中，“有意义地”意味着能够在统计计算中将这些未测量的结果与已测量的结果同等对待。反事实确定性是与物理系统的物理和数学模型直接相关的一个（有时是假设但未说明的）方面，而不是关于未测量结果的含义的哲学问题。 “反事实”可能作为名词出现在物理讨论中。在这种情况下的意思是“一个可以被测量但因故没有被测量的值”。 (zh) In quantum mechanics, counterfactual definiteness (CFD) is the ability to speak "meaningfully" of the definiteness of the results of measurements that have not been performed (i.e., the ability to assume the existence of objects, and properties of objects, even when they have not been measured). The term "counterfactual definiteness" is used in discussions of physics calculations, especially those related to the phenomenon called quantum entanglement and those related to the Bell inequalities. In such discussions "meaningfully" means the ability to treat these unmeasured results on an equal footing with measured results in statistical calculations. It is this (sometimes assumed but unstated) aspect of counterfactual definiteness that is of direct relevance to physics and mathematical model (en)
dcterms:subject	Quantum measurement
Wikipage page ID	36667 (xsd:integer)
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Link from a Wikipage to another Wikipage	Quantum entanglement Quantum mechanics Bell's theorem Determinism Robert Griffiths (physicist) Uncertainty principle Interaction-free measurement Elitzur-Vaidman bomb tester Copenhagen interpretation Elitzur–Vaidman bomb-tester Momentum Naive realism Consistent histories Transactional interpretation Superdeterminism Renninger negative-result experiment Scientific realism Counterfactual quantum computation Asher Peres Quantum measurement Quantum indeterminacy Principle of locality Interpretation of quantum mechanics Hidden variable theory Wheeler's delayed choice experiment Bell inequalities Many worlds interpretation Locality principle Umass amherst Spooky action at a distance dbr:No-conspiracy_assumption
Link from a Wikipage to an external page	https://web.archive.org/web/20070710011825/http:/www.phys.tue.nl/ktn/Wim/i.pdf https://www.jstor.org/pss/186879 https://www.scientificamerican.com/article/nil-communication-how-to-send-a-message-without-sending-anything-at-all/ https://doi.org/10.1007%2FBF00732548 https://doi.org/10.1007%2FBF00769704 https://doi.org/10.1007%2FBF00769705 https://doi.org/10.1007%2FBF02054787
sameAs	Counterfactual definiteness Counterfactual definiteness Counterfactual definiteness Counterfactual definiteness
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has abstract	In quantum mechanics, counterfactual definiteness (CFD) is the ability to speak "meaningfully" of the definiteness of the results of measurements that have not been performed (i.e., the ability to assume the existence of objects, and properties of objects, even when they have not been measured). The term "counterfactual definiteness" is used in discussions of physics calculations, especially those related to the phenomenon called quantum entanglement and those related to the Bell inequalities. In such discussions "meaningfully" means the ability to treat these unmeasured results on an equal footing with measured results in statistical calculations. It is this (sometimes assumed but unstated) aspect of counterfactual definiteness that is of direct relevance to physics and mathematical models of physical systems and not philosophical concerns regarding the meaning of unmeasured results. "Counterfactual" may appear in physics discussions as a noun. What is meant in this context is "a value that could have been measured but, for one reason or another, was not." (en) 在量子力学中，反事实确定性（英語：counterfactual definiteness，简称CFD）是指“有意义地”谈论尚未进行的测量的结果的确定性的能力（即假设物体的存在和物体的属性的能力，即使它们尚未被测量）。术语“反事实确定性”被用于物理计算的讨论，尤其是与量子纠缠现象以及贝尔不等式相关的讨论。在此类讨论中，“有意义地”意味着能够在统计计算中将这些未测量的结果与已测量的结果同等对待。反事实确定性是与物理系统的物理和数学模型直接相关的一个（有时是假设但未说明的）方面，而不是关于未测量结果的含义的哲学问题。 “反事实”可能作为名词出现在物理讨论中。在这种情况下的意思是“一个可以被测量但因故没有被测量的值”。 (zh)
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is Link from a Wikipage to another Wikipage of	Quantum logic gate Ensemble interpretation Bell's theorem De Broglie–Bohm theory Indeterminism Index of physics articles (C) Interaction-free measurement Copenhagen interpretation Quantum Reality Quantum key distribution Elitzur–Vaidman bomb tester If a tree falls in a forest Mach–Zehnder interferometer Transactional interpretation Counterfactual (disambiguation) Formulary controversy Definiteness (disambiguation) Leggett inequality Reality Reification (fallacy) Renninger negative-result experiment Interpretations of quantum mechanics Counterfactual quantum computation Free will theorem CFD Quantum indeterminacy Principle of locality Counter-Factual Definiteness Counter-factual definiteness Counter Factual Definiteness Counter factual definiteness Counterfactual communication Contrafactual definiteness
is Wikipage redirect of	Counter-Factual Definiteness Counter-factual definiteness Counter Factual Definiteness Counter factual definiteness Counterfactual communication Contrafactual definiteness
is Wikipage disambiguates of	Counterfactual (disambiguation) Definiteness (disambiguation)
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