Does the LHC violate the Heisenberg Uncertainty Principle?

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Allan Michael

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Allan Michael asked the Naked Scientists:
   
Does the LHC violate the Heisenberg Uncertainty Principle?

At the point when the sub-atomic particles are in one of the detectors presumably both their momentum and position are known accurately.

What do you think?
« Last Edit: 07/07/2011 14:30:02 by _system »

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Offline yor_on

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Does the LHC violate the Heisenberg Uncertainty Principle?
« Reply #1 on: 07/07/2011 13:42:50 »
How?

HUP states that you can't measure both at a simultaneous point in time. Weak measurements allow you to define a particle path, and the energy you deliver makes you expect a certain momentum, but you won't be able to measure both simultaneously. So you point and you shoot, and then watch all the pretty pictures :)
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"The combined uncertainties of simultaneous measurements of position and momentum in a given direction cannot be less than Planck's constant h divided by 4π"
« Last Edit: 07/07/2011 13:45:26 by yor_on »
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Offline imatfaal

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Does the LHC violate the Heisenberg Uncertainty Principle?
« Reply #2 on: 07/07/2011 17:55:32 »
I think weak measurements are a diversion here - HUP boundaries are incredibly small and in real world situation with physical meaurement they are unlikely to be a problem.  Plancks constant is very very small. 

With very rough gloves on - to get close to perturbing HUP you need to be measuring both position and momentum to an accuracy of one in 10^17.

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edited to correct mis-spelling of planck
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