Science 版 (精华区)
作 家: Smart (Cynic) on board 'Science'
题 目: <<NST>>VI --- Hawking on physics and reality
来 源: 哈尔滨紫丁香站
日 期: Mon Oct 20 13:01:12 1997
出 处: wangw@phy5.hit.edu.cn
The Nature of
Space and Time
Two relativists present their distinctive views on the universe, its
evolution and the impact of quantum theory
by Stephen W. Hawking and Roger Penrose
VI. Hawking on physics and reality:
These lectures have shown very clearly the difference
between Roger and me. He's a Platonist and I'm a
positivist. He's worried that Schroedinger's cat is in a
quantum state, where it is half alive and half dead. He
feels that can't correspond to reality. But that doesn't
bother me. I don't demand that a theory correspond to
reality because I don't know what it is. Reality is not a
quality you can test with litmus paper. All I'm concerned
with is that the theory should predict the results of
measurements. Quantum theory does this very
successfully....
Roger feels that...the collapse of the wave function
introduces CPT violation into physics. He sees such
violations at work in at least two situations: cosmology
and black holes. I agree that we may introduce time
asymmetry in the way we ask questions about observations.
But I totally reject the idea that there is some physical
process that corresponds to the reduction of the wave
function or that this has anything to do with quantum
gravity or consciousness. That sounds like magic to me,
not science.
--
※ 来源:·哈尔滨紫丁香站 bbs1.hit.edu.cn·[FROM: wangw@phy5.hit.edu.c]
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