- #1
dm4b
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I came across an article from 2007 talking about some experiemtns that are an extension of the experiments which originally tested for Bell's Inequality. These tests were supposedly designed to relax the locality requirements and test soley for realism. I'll quote a few pertinent sections:
" Now physicists from Austria claim to have performed an experiment that rules out a broad class of hidden-variables theories that focus on realism -- giving the uneasy consequence that reality does not exist when we are not observing it "
"Markus Aspelmeyer, Anton Zeilinger and colleagues from the University of Vienna, however, have now shown that realism is more of a problem than locality in the quantum world. They devised an experiment that violates a different inequality proposed by physicist Anthony Leggett in 2003 that relies only on realism, and relaxes the reliance on locality. "
"They found that, just as in the realizations of Bell's thought experiment, Leggett's inequality is violated – thus stressing the quantum-mechanical assertion that reality does not exist when we're not observing it."
I had some questions on the next quote here:
"However, Alain Aspect, a physicist who performed the first Bell-type experiment in the 1980s, thinks the team's philosophical conclusions are subjective. "There are other types of non-local models that are not addressed by either Leggett's inequalities or the experiment," he said."
I'm curious if anybody knows what other non-local models he is referencing? And, have these been able to be tested since 2007? What's the latest and greatest on all this?
Either way, I agree with Alain Aspect when he says at the end of this article:
"But, I rather share the view that such debates, and accompanying experiments such as those by [the Austrian team], allow us to look deeper into the mysteries of quantum mechanics."
Entire article:
http://physicsworld.com/cws/article/news/27640
" Now physicists from Austria claim to have performed an experiment that rules out a broad class of hidden-variables theories that focus on realism -- giving the uneasy consequence that reality does not exist when we are not observing it "
"Markus Aspelmeyer, Anton Zeilinger and colleagues from the University of Vienna, however, have now shown that realism is more of a problem than locality in the quantum world. They devised an experiment that violates a different inequality proposed by physicist Anthony Leggett in 2003 that relies only on realism, and relaxes the reliance on locality. "
"They found that, just as in the realizations of Bell's thought experiment, Leggett's inequality is violated – thus stressing the quantum-mechanical assertion that reality does not exist when we're not observing it."
I had some questions on the next quote here:
"However, Alain Aspect, a physicist who performed the first Bell-type experiment in the 1980s, thinks the team's philosophical conclusions are subjective. "There are other types of non-local models that are not addressed by either Leggett's inequalities or the experiment," he said."
I'm curious if anybody knows what other non-local models he is referencing? And, have these been able to be tested since 2007? What's the latest and greatest on all this?
Either way, I agree with Alain Aspect when he says at the end of this article:
"But, I rather share the view that such debates, and accompanying experiments such as those by [the Austrian team], allow us to look deeper into the mysteries of quantum mechanics."
Entire article:
http://physicsworld.com/cws/article/news/27640