News tagged with quantum coherence

A quantum leap in computing

When American physicist Richard Feynman in 1982 proposed creating a quantum computer that could solve complex problems, the idea was merely a theory scientists believed was far off in the future.

Jan 04, 2012
4.5 / 5 (11) 5 | with audio podcast

Scientists view a quantum jump in real time

(PhysOrg.com) -- For more than two decades, scientists have been "watching" electrons in atoms make the jump between energy levels in real time. "Atoms have energy levels, and when electrons 'jump' from one level to another, ...

Apr 11, 2011 feature
4.5 / 5 (29) 3 | with audio podcast

Light controls matter, matter controls x-rays

Like playing a game of scissors-paper-rock, a team of scientists led by Thornton E. (Ernie) Glover of Lawrence Berkeley National Laboratory's Advanced Light Source (ALS), Linda Young of Argonne National Laboratory, ...

Mar 24, 2010
5 / 5 (10) 1 | with audio podcast

Working out a timescale for quantum operations

One of the issues affecting quantum systems is coherence. Understanding coherence and how it breaks down (decoherence) is one of the keys to putting together a powerful quantum computer. And, because wires made from metal ...

Jun 17, 2009 feature
4.7 / 5 (9) 0

Exerting better control over matter waves

(PhysOrg.com) -- “The concept of matter waves is at the heart of quantum mechanics,” Oliver Morsch tells PhysOrg.com. “At the beginning of the last century, scientists discovered that solid particles could exhibit proper ...

Mar 27, 2009 feature
4.6 / 5 (29) 12