2009年11月05日

Quantum theory in context

Quantum mechanics has had notable success in the almost 90 years since it was introduced, and its predictions have been confrmed in many experimebts.

Nevertheless, many physicists not content with the axioms of the theory have been searching for an explanation of quantum physical predictions in terms of a classical theory.

An intuitive feature of classical models in non-contextuality : the property that any measurement has a value independent of other compatible measurements being carried out at the same time.

Theory suggests that non-contextuality is in conflict with quantum mechanics, and experiments undertaken with photons and neutrons seem to support this.

However, these tests required the generation of special quantum states and left some loopholes open.

Now Kirchmair et al. have oerformed an exoeriment with trapped ions that overcomes these problems and cannot be explained in non-contextual terms.

Contextuality is therefore a property of nature that does not require the generation of special quantum states or quantum entanglement.

### DataBace ###
nature Vol.460 429-544 Issue no.7254 23 July 2009
Letter p.494
News & Views p.434
posted by 0≠素子 at 18:49| Comment(0) | quantum mechanics | このブログの読者になる | 更新情報をチェックする
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