New experiment verifies quantum spookiness | Science News

Be a Champion for Science

Get your subscription to

Science News when you join.


News

New experiment verifies quantum spookiness

Variation on classic test of entanglement closes loopholes

By
11:02am, August 28, 2015

It’s official: Quantum mechanics is spooky.

A new experiment provides the best evidence yet that the common-sense concept of locality — that an event on Earth can’t immediately influence what happens on Mars, for instance — doesn’t apply in the quantum realm.

Researchers have long thought that quantum theory is nonlocal. But airtight experimental confirmation has been difficult to achieve. Now a new paper, posted online August 26 at arXiv.org, closes two loopholes that had cast a smidgen of doubt on previous results from a crucial test.

“Nonlocality is so fundamental and so important for our worldview of quantum mechanics that it’s important to achieve such a result,” says Nicolas Gisin, a quantum physicist at the University of Geneva. An apparatus similar to the one used in the new experiment could be used to build extremely secure communication networks.

This article is available only to subscribing members. Join the Society today or Log in.

Get Science News headlines by e-mail.

More from Science News