Entangled - Revision history

Tom: /* Context */

2025-08-10T21:33:41Z

‎Context

Tom: /* Quantum Bayesianism (QBism) */

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‎Quantum Bayesianism (QBism)

Tom: /* Quantum Bayesianism (QBism) */

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‎Quantum Bayesianism (QBism)

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‎Quantum Bayesianism (QBism)

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‎Quantum Bayesianism (QBism)

Tom: /* Relational Quantum Mechanics */

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‎Relational Quantum Mechanics

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‎Add a 5th dimensions=

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‎Alternate Views

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‎Problems

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‎Problems

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 ==Context==
 This characteristic of [[Quantum Mechanics]] was first noted by Schrödinger and Einstein in the early days of the development of Quantum theory.<ref>Anton Zeilinger, ''Dance of the Photons'' p. 243 ISBN 978-0374239664</ref> Very few physicists worried about this until John Bell published a paper defining [[Reality|Local Realism]] in a way that could be tested.<ref>John Bell, ''On the EPR Paradox'' Physics 1 (1964) 195-200 https://journals.aps.org/ppf/pdf/10.1103/PhysicsPhysiqueFizika.1.195</ref> Many scientists (and philosophers) have tested the concept of Local Realism, since it appears to be required by relativity, but is is quite clear now that it is a theory that has been conclusively falsified. This does, if fact, prove that quantum mechanics, as understood in the early years, is incomplete. Which is what Einstein claimed in the EPR paper.<ref>APS News, ''Einstein and the EPR Paradox'' https://www.aps.org/publications/apsnews/200511/history.cfm#:~:text=In%20a%201935%20paper%2C%20Einstein%2C%20Boris%20Podolsky%20and,demonstrate%20the%20innate%20conceptual%20difficulties%20of%20quantum%20theory.</ref>
 ==EPR Paradox==

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 This interpretation, developed by Christopher Fuchs and Rüdiger Schack, views quantum states as representing an observer's subjective knowledge or beliefs about a system, rather than objective reality. In this view, entanglement reflects the correlations in the observer's knowledge about the outcomes of measurements on entangled particles.
-This approach catches some flak for smacking of solipsism, since it seems as if the world exists only through the eyes of an agent. But Fuchs pushes back. He believes strongly in the existence of a real physical world, one that existed before there were agents to observe it. It’s just that we can’t make many meaningful statements about what that world is like until agents like ourselves arise to study it. “I’m in the world. I play a part in it. I can’t delete myself,” he said.<ref>Charle Wood, '' ‘It’s a Mess’: A Brain-Bending Trip to Quantum Theory’s 100th Birthday Party'' 2025-07 https://www.quantamagazine.org/its-a-mess-a-brain-bending-trip-to-quantum-theorys-100th-birthday-party-20250808/</ref>
+This approach catches some flak for smacking of solipsism, since it seems as if the world exists only through the eyes of an agent. But Fuchs pushes back. He believes strongly in the existence of a real physical world, one that existed before there were agents to observe it. It’s just that we can’t make many meaningful statements about what that world is like until agents like ourselves arise to study it. “I’m in the world. I play a part in it. I can’t delete myself,” he said.<ref>Charle Wood, '' ‘It’s a Mess’: A Brain-Bending Trip to Quantum Theory’s 100th Birthday Party'' Quanta Magazine 2025-07 https://www.quantamagazine.org/its-a-mess-a-brain-bending-trip-to-quantum-theorys-100th-birthday-party-20250808/</ref>
 ===Add a 5th dimensions===

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 This interpretation, developed by Christopher Fuchs and Rüdiger Schack, views quantum states as representing an observer's subjective knowledge or beliefs about a system, rather than objective reality. In this view, entanglement reflects the correlations in the observer's knowledge about the outcomes of measurements on entangled particles.
-This approach catches some flak for smacking of solipsism, since it seems as if the world exists only through the eyes of an agent. But Fuchs pushes back. He believes strongly in the existence of a real physical world, one that existed before there were agents to observe it. It’s just that we can’t make many meaningful statements about what that world is like until agents like ourselves arise to study it. “I’m in the world. I play a part in it. I can’t delete myself,” he said.<ref>Charle Wood, https://www.quantamagazine.org/its-a-mess-a-brain-bending-trip-to-quantum-theorys-100th-birthday-party-20250808/</ref>
+This approach catches some flak for smacking of solipsism, since it seems as if the world exists only through the eyes of an agent. But Fuchs pushes back. He believes strongly in the existence of a real physical world, one that existed before there were agents to observe it. It’s just that we can’t make many meaningful statements about what that world is like until agents like ourselves arise to study it. “I’m in the world. I play a part in it. I can’t delete myself,” he said.<ref>Charle Wood, '' ‘It’s a Mess’: A Brain-Bending Trip to Quantum Theory’s 100th Birthday Party'' 2025-07 https://www.quantamagazine.org/its-a-mess-a-brain-bending-trip-to-quantum-theorys-100th-birthday-party-20250808/</ref>
 ===Add a 5th dimensions===

@@ Line 42: / Line 42: @@
 This interpretation, developed by Christopher Fuchs and Rüdiger Schack, views quantum states as representing an observer's subjective knowledge or beliefs about a system, rather than objective reality. In this view, entanglement reflects the correlations in the observer's knowledge about the outcomes of measurements on entangled particles.
-This approach catches some flak for smacking of solipsism, since it seems as if the world exists only through the eyes of an agent. But Fuchs pushes back. He believes strongly in the existence of a real physical world, one that existed before there were agents to observe it. It’s just that we can’t make many meaningful statements about what that world is like until agents like ourselves arise to study it. “I’m in the world. I play a part in it. I can’t delete myself,” he said.
+This approach catches some flak for smacking of solipsism, since it seems as if the world exists only through the eyes of an agent. But Fuchs pushes back. He believes strongly in the existence of a real physical world, one that existed before there were agents to observe it. It’s just that we can’t make many meaningful statements about what that world is like until agents like ourselves arise to study it. “I’m in the world. I play a part in it. I can’t delete myself,” he said.<ref>Charle Wood, https://www.quantamagazine.org/its-a-mess-a-brain-bending-trip-to-quantum-theorys-100th-birthday-party-20250808/</ref>
 ===Add a 5th dimensions===

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 ===Quantum Bayesianism (QBism)===
 This interpretation, developed by Christopher Fuchs and Rüdiger Schack, views quantum states as representing an observer's subjective knowledge or beliefs about a system, rather than objective reality. In this view, entanglement reflects the correlations in the observer's knowledge about the outcomes of measurements on entangled particles.
 ===Add a 5th dimensions===

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 ===Relational Quantum Mechanics===
- This interpretation, proposed by Carlo Rovelli, suggests that the properties of quantum systems are relative to the observer. In this view, entanglement is a manifestation of the relational nature of quantum states, where the properties of particles are defined by their interactions with other systems, including observers.
+This interpretation, proposed by Carlo Rovelli, suggests that the properties of quantum systems are relative to the observer. In this view, entanglement is a manifestation of the relational nature of quantum states, where the properties of particles are defined by their interactions with other systems, including observers.
 ===Quantum Bayesianism (QBism)===

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 Inequalities Using Time-varying Analyzers'' Physical Review Letters, 49(25), 1804-1807</ref>
 ==Problems==
 A team of four researchers has proved that entanglement doesn’t just weaken as temperature increases. Rather, in mathematical models of quantum systems such as the arrays of atoms in physical materials, there’s always a specific temperature above which it vanishes completely. “It’s not just that it’s exponentially small,” said Ankur Moitra of the Massachusetts Institute of Technology, one of the authors of the new result. “It’s zero.” Researchers had previously observed hints of this behavior and dubbed it the “sudden death(opens a new tab)” of entanglement. But their evidence has always been indirect. The new finding, by contrast, has the force of a mathematical proof. It establishes the absence of entanglement in a much more comprehensive and rigorous way.
 The team made their discovery while exploring the theoretical capabilities of future quantum computers — machines that will exploit quantum behavior, including entanglement and superposition, to perform certain calculations far faster than the conventional computers we know today.. The team made their discovery while exploring the theoretical capabilities of future quantum computers — machines that will exploit quantum behavior, including entanglement and superposition, to perform certain calculations far faster than the conventional computers we know today.
-<ref>Ben Brubaker, ''Computer Scientists Prove That Heat Destroys Quantum Entanglement'' 2024-08-28 https://www.quantamagazine.org/computer-scientists-prove-that-heat-destroys-entanglement-20240828/?mc_cid=94caee8978&mc_eid=ffe1625684</ref><ref>Kenna Castleberry, ''Molecules in Flat Lands: an Entanglement Paradise'' JILA (2021) https://jila.colorado.edu/news-events/articles/molecules-flat-lands-entanglement-paradise</ref>
+<ref>Ben Brubaker, ''Computer Scientists Prove That Heat Destroys Quantum Entanglement'' 2024-08-28 https://www.quantamagazine.org/computer-scientists-prove-that-heat-destroys-entanglement-20240828/?mc_cid=94caee8978&mc_eid=ffe1625684</ref>
 ==Mathematical View==