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→The Uncertainty principle doesn't invalidate Perpetual motion...: a full view of the meaning of the Second Law does recognize that quantum uncertainty underlies it. Quantum uncertainty does hav
:::::::::Can I please point out that the 2nd Law, at present, does NOT have any consistent and/or accepted deep physical mechanism behind it involving quantum mechanics or whatever. It can be justified by the argument that systems will naturally move towards larger homogenous volumes in phase space, but the question of WHY we think the 2nd law is valid is still entirely open. The Uncertainty Principle as normally presented (i.e. the product of uncertainties between certain pairs of eigenvalues of observables - specifically, those that don't commute with each other) in no way has any time-asymmetry in it. The 2nd law DOES have time-asymmetry. There's no argument that you, I, or any of the most learned physicists in the world can currently make which directly attributes "entropy" to "quantum uncertainty". If you have one, with the mathematics to back it up, please submit it to Nature, and prepare for a trip to Stockholm... [[User:DanPW | Dan W]]
:::::::::Can I please point out that the 2nd Law, at present, does NOT have any consistent and/or accepted deep physical mechanism behind it involving quantum mechanics or whatever. It can be justified by the argument that systems will naturally move towards larger homogenous volumes in phase space, but the question of WHY we think the 2nd law is valid is still entirely open. The Uncertainty Principle as normally presented (i.e. the product of uncertainties between certain pairs of eigenvalues of observables - specifically, those that don't commute with each other) in no way has any time-asymmetry in it. The 2nd law DOES have time-asymmetry. There's no argument that you, I, or any of the most learned physicists in the world can currently make which directly attributes "entropy" to "quantum uncertainty". If you have one, with the mathematics to back it up, please submit it to Nature, and prepare for a trip to Stockholm... [[User:DanPW | Dan W]]
::::::::::I appreciate the flattering suggestion, but the [[Nobel Prize]] is never given to a [[conservative]] and/or anyone who has publicly criticized the [[Theory of Relativity]] or the [[Theory of Evolution]]. See, e.g., [[Robert Dicke]], [[Fred Hoyle]], [[Ronald Reagan]], etc.
::::::::::I agree that narrow interpretations of the Second Law are, well, limited in what they conclude. But a full view of the meaning of the Second Law does recognize that quantum uncertainty underlies it. Quantum uncertainty does have a time-asymmetry to it ... just as attempts at a perpetual motion machine do.--[[User:Aschlafly|Andy Schlafly]] 22:33, 5 May 2012 (EDT)