Showing posts with label Paradox. Show all posts
Showing posts with label Paradox. Show all posts

20 April, 2011

A-Z Blogging Challenge: Q Stands For: Quantum Mechanics

Ready for another science post, everyone? :)


Quantum mechanics is a branch of physics dealing with wave-particle duality. Wave-particle duality is when matter acts like both a wave (think liquid) and a particle (think atoms). Quantum mechanics describes a physical system through a wavefunction, which predicts the chances of a particle being in a certain state at a certain time. This sort of probability is called probability amplitude.


The thing about the wavefunction is that the more you try to calculate one part of the system, the less accurate your measurements will be with regards to another part of the system. This is called the Heisenberg Uncertainty Principle.

(Good ol' Heisenberg. SOURCE)

The uncertainty principle brings into question the role of the observer. The Copenhagen Interpretation is the standard interpretation of measurement, the "statistical nature of reality", and the philosophical debate over what effect an observer has over a system. It says that observation causes the wavefunction to collapse; also referred to as consciousness causes collapse. One of the more famous thought-experiments to demonstrate this sort of thing is the Schroedinger's Cat experiment. (In which no live cats were harmed, by the way. Just thought-experiment ones.)


But there are other ideas on how quantum mechanics works. There's the Many Worlds Theory, Consistent Histories, Ensemble Interpretation, de Broglie-Bohm Theory, Relational Quantum Mechanics, Transactional Interpretation, Stochastic Mechanics, Objective Collapse Theories, von Neumann/Wigner Interpretation, Many Minds, Quantum Logic, Modal Interpretations, Time-Symmetric Theories, the list goes on and on.

Obviously, there's a lot of figuring out to do.

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Sources:

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No question this time. You have the floor on quantum mechanics!


(Also, I won't be around to your blogs today. I'll do my best to catch up with posts tomorrow, and I'll be sure to swing by anyone who comments here.)

-----The Golden Eagle