Questions tagged [contextuality]
For questions related to contextuality (a foundational concept in quantum mechanics) as relevant to quantum computing and/or quantum information. Contextuality means that in any theory that attempts to explain quantum mechanics deterministically, the measurement result of a quantum observable depends on the specific experimental setup being used to measure that observable, in particular, the commuting observables being measured with it. (Wikipedia)
4
questions
2
votes
1answer
39 views
Quantum contextuality and commuting observables
I am trying to get a better understanding of what is the idea behind quantum contextuality. Quoting from the wikipedia page (emphasis mine):
Quantum contextuality is a foundational concept in ...
3
votes
1answer
355 views
What does negative probability represent?
"Negative energies and probabilities should not be considered as nonsense. They are well-defined concepts mathematically, like a negative of money." -Paul Dirac
The abstract from Photon-phonon-photon ...
13
votes
2answers
780 views
Is it true to say that one qubit in an entangled state can instantaneously affect all others?
When a qubit is measured, there is a ‘collapse of the wave-function’ as a result is randomly chosen.
If the qubit is entangled with others, this collapse will also effect them. And the way it affects ...
5
votes
1answer
70 views
Are there any experimental groups currently measuring quantum contextuality?
I work as a theorist with my current research interests in "quantum contextuality". For those perusing the question, this is essentially a generalization of non-locality where we can show a quantum ...
