- #1
jlcd
- 274
- 7
There is something that I don't quite understand or want clarification. See John Wheeler article "100 years of the quantum"
http://arxiv.org/pdf/quant-ph/0101077v1.pdf
refer to page 6 with parts of the quotes read
"so if we could measure whether the card was in the alpha
or beta-states, we would get a random outcome. In
contrast, if we put the card in the state “face up”, it
would stay “face up” in spite of decoherence. Decoherence
therefore provides what Zurek has termed a “predictability
sieve”, selecting out those states that display
some permanence and in terms of which physics has predictive
power."
but note that the state alpha and beta still exist. what if we would get random outcome (and what does this mean). Is it saying that since it's random outcome.. it doesn't occur in our world.. but somehow it still exist??
My math is very high school so please mention only those in the article above and not letting me read a treatise about density matrix that would confuse me more. Just want to understand this thing about alpha state (superposition of up and down). In the Schrodinger Cat analogy. Alpha is that Cat dead plus Cat alive. The density matrix would still produce it but only random outcome? Again does it mean we just don't perceive it but it's still there (let's not use Copenhagen where they made the ad hoc classical cut or sweeping it under the rug.. let's use the all quantum formalism where all system, environment, measuring device are all quantum). Thanks.
http://arxiv.org/pdf/quant-ph/0101077v1.pdf
refer to page 6 with parts of the quotes read
"so if we could measure whether the card was in the alpha
or beta-states, we would get a random outcome. In
contrast, if we put the card in the state “face up”, it
would stay “face up” in spite of decoherence. Decoherence
therefore provides what Zurek has termed a “predictability
sieve”, selecting out those states that display
some permanence and in terms of which physics has predictive
power."
but note that the state alpha and beta still exist. what if we would get random outcome (and what does this mean). Is it saying that since it's random outcome.. it doesn't occur in our world.. but somehow it still exist??
My math is very high school so please mention only those in the article above and not letting me read a treatise about density matrix that would confuse me more. Just want to understand this thing about alpha state (superposition of up and down). In the Schrodinger Cat analogy. Alpha is that Cat dead plus Cat alive. The density matrix would still produce it but only random outcome? Again does it mean we just don't perceive it but it's still there (let's not use Copenhagen where they made the ad hoc classical cut or sweeping it under the rug.. let's use the all quantum formalism where all system, environment, measuring device are all quantum). Thanks.