This week was good for #QuantumFoundations in the Arxiv; this one is particularly interesting because the usage of operational theories is not only a foundations matter, but it is highly used in applications and proofs of quantum information advantage.

It is a constant aspect: quantum foundations keep proving itself interesting for the applied physicist. In defense of quantum foundations, here is an g(old) gem!

(5/n), n=5.

https://arxiv.org/abs/1003.5008

#QuantumFoundations #ArXiv

Just finished reading an interesting paper discussing non-linear dynamics.

The claim can be explained with the following task: Consider a researched in its laboratory (system S) and a physical system being tested (system A). Can the researched discriminate/learn if the total system SA is coherent, performing only local tests inside the laboratory?

The work shows that this is possible iff the theory allows for non-linear dynamics. (1/n)

https://scirate.com/arxiv/2302.13421

Interesting unpacking from Hossenfelder on the issues she has with particle physics.

But I'm not sure she herself is immune from the motivational issues she cites. For example, are her reasons for preferring hidden variable theories in QM really any different from the ones she's criticizing here?

To be fair, I doubt anyone really avoids these issues. Testing matters! And which tests to fund seems inevitably a judgment call.

https://www.youtube.com/watch?v=lu4mH3Hmw2o
#physics #TheoreticalPhysics #ParticlePhysics #quantum #QuantumFoundations

Q17: How often have you switched to a different interpretation (of quantum theory)?

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q16 (part B): What is your reason for NOT favoring De Broglie - Bohm theory?

A: It is too complex compared to other interpretations - i.e. Ockham's razor

B: It has hidden variables, which makes the theory untenable according to Bells inequality

C: Nonlocality

D:The notion of all particles possessing a quantum potential that guides them seems too farfetched

E: Other

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q16 (part A): What is your reason for NOT favoring De Broglie - Bohm theory?

A: It is too complex compared to other interpretations - i.e. Ockham's razor

B: It has hidden variables, which makes the theory untenable according to Bells inequality

C: Nonlocality

D:The notion of all particles posessing a quantum potential that guides them seems too farfetched

E: Other

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q15 (part A): What is your reason for NOT favoring De Broglie - Bohm theory?

A: It is too complex compared to other interpretations - i.e. Ockham's razor

B: It has hidden variables, which makes the theory untenable according to Bells inequality

C: Nonlocality

D:The notion of all particles posessing a quantum potential that guides them seems too farfetched

E: Other

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q4: Superpositions of macroscopically distinct states, e.g. a current loop in a superposition of two magnetic fluxes, are:

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

There's Always A Blog Dept: Scott's blog serves up a tidy summary of ongoing discussions of the relevance of work in #QuantumFoundations to outstanding problems. Those problems often involve which clashes one can choose to ignore to get some work done. Many of us feel Everett's crutch points at a domain wall , not a solution. Reflexive #NonFalsifiability can and should make one suspicious
https://scottaaronson.blog/?p=5359

Ethan Siegel here argues we shouldn't explore quantum interpretations, because they can't currently be adjudicated empirically.

It's worth noting that Einstein and colleagues received this type of criticism with their 1935 EPR paper. If everyone had heeded it, this year's Nobel prizes for entanglement experiments wouldn't exist.

Curiosity, and attempted explanations, are a good thing, as long as we remember the status of those explanations.

https://bigthink.com/starts-with-a-bang/quantum-reality/
#QuantumFoundations #quantum

Q15 (part B): What is your main reason for NOT favoring the many worlds interpretation?

A: The notion of multiple worlds seems too farfetched

B: The notion of multiple minds seems too farfetched

C: The interpretation is too complex compared to others - i.e. Ockham's razor

D: The interpretation is unable to explain the Born rule

E: It can never be corroborated experimentally

F: Other (leave a comment)

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q15 (part A): What is your main reason for NOT favoring the many worlds interpretation?

A: The notion of multiple worlds seems too farfetched

B: The notion of multiple minds seems too farfetched

C: The interpretation is too complex compared to others - i.e. Ockham's razor

D: The interpretation is unable to explain the Born rule

E: It can never be corroborated experimentally

F: Other (leave a comment)

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q14: What is your main reason for NOT favoring the Copenhagen interpretation?

A: The role the observer plays in determining the physical state is too important

B: The paradoxes that arise on the macroscopic scale, e.g. Scrödinger's cat and Wigner's friend

C: Nonlocality

D: Quantum mechanics describes nature as it really is

E: Other (leave a comment)

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q13 (part D): What is your favourite interpretation of quantum mechanics?

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q13 (part C): What is your favourite interpretation of quantum mechanics?

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q13 (part B): What is your favourite interpretation of quantum mechanics?

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q13 (part A): What is your favourite interpretation of quantum mechanics?

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q12 (part B): What characterizes De Broglie-Bohm pilot wave interpretation of quantum mechanics?

(Quantum potential = each particle has an associated potential that guides the particle)

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

Q12 (part A): What characterizes De Broglie-Bohm pilot wave interpretation of quantum mechanics?

#Quantum #QuantumFoundations #QuantumMechanics #QuantumComputing

@ZachWeinersmith I feel like superdeterinism should be called something like "Universal Conspiracy", because it amounts to the universe, from the big bang forward, being arranged in just such a way to make sure our little experiments have correlations they shouldn't.
#quantum #superdeterminism #quantumfoundations