(De)coherence

I think this discussion might have already took place here, but I will post this to take your opinions on the topic. How do we define (de)coherence? What makes interference happen or be lost? Taking the double-slit experiment in mind, with paths A and B, the first answer that comes to the mind

(De)coherence

I think this discussion might have already took place here, but I would like to take you opinions on this. How do we define (de)coherence? What makes interference happen or be lost? Take the a double-slit-like experiment. A particle can take two paths, A and B. We can in principle detect which

Re: (De)coherence

Eric wrote (in a long post, most of it logical and followable): Take the a double-slit-like experiment. A particle can take two paths, A and B. We can in principle detect which path the particle went through. So far so good, the problem starts when it is assumed that the particle takes BOTH

Re: (De)coherence

Hello Eric, Just my tuppenceworth... Eric Cavalcanti wrote: I think this discussion might have already took place here, but I would like to take you opinions on this. How do we define (de)coherence? What makes interference happen or be lost? First, these are two separate questions.

Re: (De)coherence

This list started with fresh new ideas of ingenious, well trained brains. During the years it slips more and more into scholastic formalistic physical science. It is a pity. John Mikes Maybe. But physical science can offer more than the old riddles. I.e.: - branching space-times (Belnap,

Re: Why is there something instead of nothing?

Readers might be interested in a project group (which includes Hal and myself) which is aimed at a systematic investigation of the fundamental question encompassing this very issue. Anyone with a serious interest and commitment to careful rational thought can join in. Details at

Why is there something rather than nothing?

Gentlemen, Thanks for the opinions. Youhave convinced me thatat leastthe empty set MUST exist, and "The whole of mathematics can, in principle, be derived from the properties of the empty set, Ø."(From http://www.hedweb.com/nihilism/nihilf01.htm.) "In the Universe as a whole, the conserved

Re: (De)coherence

Hi Eric, You are asking important questions which have been discussed by this group but to which imo, no satisfactory answer was given. First I'll widen the problem to place it in context. I can think of at least five ways that QM manifest itself: 1) Quantum Randomness 2) Spooky action at a