Free Republic
Browse · Search
News/Activism
Topics · Post Article

To: PatrickHenry
Here's Zurek's abstract for his pre-print article:

Decoherence is caused by the interaction with the environment. Environment monitors certain observables of the system, destroying interference between the pointer states corresponding to their eigenvalues. This leads to environment-induced superselection or einselection, a quantum process associated with selective loss of information. Einselected pointer states are stable. They can retain correlations with the rest of the Universe in spite of the environment. Einselection enforces classicality by imposing an effective ban on the vast majority of the Hilbert space, eliminating especially the flagrantly non-local "Schrödinger cat" states. Classical structure of phase space emerges from the quantum Hilbert space in the appropriate macroscopic limit: Combination of einselection with dynamics leads to the idealizations of a point and of a classical trajectory. In measurements, einselection replaces quantum entanglement between the apparatus and the measured system with the classical correlation.

And here's a link to the PDF version of Zurek's pre-print article:

Decoherence, einselection, and the quantum origins of the classical

21 posted on 12/23/2004 10:33:03 AM PST by snarks_when_bored
[ Post Reply | Private Reply | To 1 | View Replies ]


To: snarks_when_bored; PatrickHenry
I Blog Books...einselection, a quantum process associated with selective loss of information.

Where the Darwinian (macroscopic) process retains information, expressing or surpressing as required to meet selection conditions, the quantum process results in loss of information? I know, I know, it's a super-simplification for both concepts.

But if "observation" on the quantum level is required for decoherence, of what does that observation consist? At our level, the macroscopic and microscopic, we see, weigh and measure. What/who is the observer which sees the unselected quantum observeables, selecting some and finding others "weighed in the balance and found wanting"?

And are the non-einselected states truly lost, or merely unexpressed?

As for the Quantum Creationists, "God retreats faster than we can find Him in our telescopes." And microscopes as well.
27 posted on 12/23/2004 12:04:42 PM PST by dr_pat (the boys i mean are not refined, they shake the mountains when they dance!)
[ Post Reply | Private Reply | To 21 | View Replies ]

To: snarks_when_bored
Decoherence is caused by the interaction with the environment. Environment monitors certain observables of the system, destroying interference between the pointer states corresponding to their eigenvalues. This leads to environment-induced superselection or einselection, a quantum process associated with selective loss of information. Einselected pointer states are stable. They can retain correlations with the rest of the Universe in spite of the environment. Einselection enforces classicality by imposing an effective ban on the vast majority of the Hilbert space, eliminating especially the flagrantly non-local "Schrödinger cat" states...
Thank you, modern science, for providing yet more evidence of the truth of creationism! All you scientist scaled the mountaintops only to find the priests already there. Here's how it works...

This loss of information happened at The Fall. When G-D kicked Adam & Eve out of the garden, He removed H~s protection of all the majickal, non-localized quantum states, eventually leaving only cold, cruel, Darwinian objectivity to survive.

In short: Objectivity is all Satan's fault.

But now, if we let G*D into our hearts, He'll extend H-s protection back to all those fragile quantum states while you pray to H^m. This is why prayer produces miracles.

(This argument, or something like it, coming soon to an AiG or Creation/Evolution Headlines website near you. :-)

38 posted on 12/23/2004 2:46:59 PM PST by jennyp (Latest creation/evolution news: http://crevo.bestmessageboard.com)
[ Post Reply | Private Reply | To 21 | View Replies ]

Free Republic
Browse · Search
News/Activism
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson