Physics:Quantum Measurement theory - Revision history

Maintenance script: Normalize quantum page header order

2026-05-22T11:32:31Z

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2026-05-22T11:10:51Z

Clean Book label remnants and backlink spacing

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Maintenance script: Remove hidden BOM characters and direct Book label after Short description

2026-05-22T11:03:03Z

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2026-05-22T10:48:05Z

Clean Short description prefix and add Book I label

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Maintenance script: Apply Quantum previous-next navigation

2026-05-20T12:24:51Z

Apply Quantum previous-next navigation

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Maintenance script: Clean missing Book I links and template output

2026-05-20T08:47:19Z

Clean missing Book I links and template output

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Maintenance script: Clean Book I red links, intro, and image slots

2026-05-20T08:14:39Z

Clean Book I red links, intro, and image slots

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Harold: Move yellow lead caption to image caption

2026-05-17T22:48:47Z

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	On the conceptual side, quantum measurement has long been at the center of debates about the meaning of quantum mechanics. These debates are closely linked to the [[Physics:Quantum Measurement problem\|measurement problem]] and the many [[Physics:Quantum Interpretations of quantum mechanics\|interpretations of quantum mechanics]].<ref>{{cite journal\|last=Mermin\|first=N. David\|author-link=N. David Mermin\|title=Commentary: Quantum mechanics: Fixing the shifty split\|journal=[[Physics Today]]\|volume=65\|issue=7\|year=2012\|pages=8–10\|doi=10.1063/PT.3.1618\|bibcode=2012PhT....65g...8M}}</ref>		On the conceptual side, quantum measurement has long been at the center of debates about the meaning of quantum mechanics. These debates are closely linked to the [[Physics:Quantum Measurement problem\|measurement problem]] and the many [[Physics:Quantum Interpretations of quantum mechanics\|interpretations of quantum mechanics]].<ref>{{cite journal\|last=Mermin\|first=N. David\|author-link=N. David Mermin\|title=Commentary: Quantum mechanics: Fixing the shifty split\|journal=[[Physics Today]]\|volume=65\|issue=7\|year=2012\|pages=8–10\|doi=10.1063/PT.3.1618\|bibcode=2012PhT....65g...8M}}</ref>

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	~~Quantum measurement of spin via the Stern–Gerlach apparatus: the system is projected onto discrete eigenstates corresponding to measurement outcomes.~~
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	[[File:Stern-Gerlach_measurement_yellow_bg.png\|thumb\|280px\|Quantum ~~Measurement theory~~.]]		[[File:Stern-Gerlach_measurement_yellow_bg.png\|thumb\|280px\|Quantum measurement of spin via the Stern–Gerlach apparatus: the system is projected onto discrete eigenstates corresponding to measurement outcomes.]]
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Harold: Arrange page top as TOC lead image columns

2026-05-17T14:00:59Z

Arrange page top as TOC lead image columns

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			{{Short description\|Quantum Collection topic on Quantum Measurement theory}}

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	A '''quantum measurement''' is the process by which a [[Physics:Quantum Exactly solvable quantum systems\|quantum system]] is probed so as to yield a result, such as a position, momentum, spin, or energy value. Unlike in classical physics, the predictions of [[Physics:Quantum mechanics		A '''quantum measurement''' is the process by which a [[Physics:Quantum Exactly solvable quantum systems\|quantum system]] is probed so as to yield a result, such as a position, momentum, spin, or energy value. Unlike in classical physics, the predictions of [[Physics:Quantum mechanics
	quantum mechanics]] are generally [[probability\|probabilistic]]: the theory does not usually specify a single certain outcome, but gives the probabilities for different possible outcomes. These probabilities are calculated by combining the system’s [[Physics:Quantum Stationary states\|quantum state]] with a mathematical description of the measurement, using the [[Physics:Quantum Postulates\|Born rule]].<ref name="Peres1995">{{cite book\|last=Peres\|first=Asher\|title=Quantum Theory: Concepts and Methods\|publisher=Kluwer Academic Publishers\|year=1995\|isbn=0-7923-2549-4}}</ref><ref name="Holevo2001">{{cite book\|last=Holevo\|first=Alexander S.\|author-link=Alexander Holevo\|title=Statistical Structure of Quantum Theory\|publisher=Springer\|series=Lecture Notes in Physics\|year=2001\|isbn=3-540-42082-7}}</ref>		quantum mechanics]] are generally [[probability\|probabilistic]]: the theory does not usually specify a single certain outcome, but gives the probabilities for different possible outcomes. These probabilities are calculated by combining the system’s [[Physics:Quantum Stationary states\|quantum state]] with a mathematical description of the measurement, using the [[Physics:Quantum Postulates\|Born rule]].<ref name="Peres1995">{{cite book\|last=Peres\|first=Asher\|title=Quantum Theory: Concepts and Methods\|publisher=Kluwer Academic Publishers\|year=1995\|isbn=0-7923-2549-4}}</ref><ref name="Holevo2001">{{cite book\|last=Holevo\|first=Alexander S.\|author-link=Alexander Holevo\|title=Statistical Structure of Quantum Theory\|publisher=Springer\|series=Lecture Notes in Physics\|year=2001\|isbn=3-540-42082-7}}</ref>
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	~~[[File:Stern-Gerlach_measurement_yellow_bg.png\|400px]]~~
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	Quantum measurement of spin via the Stern–Gerlach apparatus: the system is projected onto discrete eigenstates corresponding to measurement outcomes.		Quantum measurement of spin via the Stern–Gerlach apparatus: the system is projected onto discrete eigenstates corresponding to measurement outcomes.
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			[[File:Stern-Gerlach_measurement_yellow_bg.png\|thumb\|280px\|Quantum Measurement theory.]]
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← Older revision		Revision as of 11:10, 22 May 2026
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	{{Short description\|Quantum Collection topic on Quantum Measurement theory}}		{{Short description\|Quantum Collection topic on Quantum Measurement theory}}

	{{Quantum book backlink\|Measurement and information}}		{{Quantum book backlink\|Measurement and information}}
	{{Quantum article nav\|previous=Physics:Quantum chaos\|previous label=Chaos\|next=Physics:Quantum Measurement operators\|next label=Measurement operators}}		{{Quantum article nav\|previous=Physics:Quantum chaos\|previous label=Chaos\|next=Physics:Quantum Measurement operators\|next label=Measurement operators}}