Skip to main content

Topics

Quantum optics

Quantum optics

Quantum physics says goodbye to reality

20 Apr 2007

Some physicists are uncomfortable with the idea that all individual quantum events are innately random. This is why many have proposed more complete theories, which suggest that events are at least partially governed by extra "hidden variables". 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 (Nature 446 871).

Some 40 years ago the physicist John Bell predicted that many hidden-variables theories would be ru

You’ve reached the limit of what you can view on Physics World without registering

If you already have an account on Physics World, then please sign in to continue reading

If you do not yet have an account, please register so you can

  • Unlock all the content on the site
  • Choose which e-mail newsletters you would like to receive
Copyright © 2021 by IOP Publishing Ltd and individual contributors