News tagged with quantum information

Long-range tunneling of quantum particles

The quantum tunnel effect manifests itself in a multitude of well-known phenomena. Experimental physicists in Innsbruck, Austria, have now directly observed quantum particles transmitting through a whole ...

Jun 12, 2014
5 / 5 (21) 0

Physicists build first single-photon router

(PhysOrg.com) -- By demonstrating that an artificial atom embedded in a transmission line can route a single photon from an input port to one of two output ports, physicists have built the first router working ...

Aug 22, 2011 feature
4.9 / 5 (21) 1 | with audio podcast

Quantum engines must break down

Our present understanding of thermodynamics is fundamentally incorrect if applied to small systems and needs to be modified, according to new research from University College London (UCL) and the University of Gdańsk. The ...

Jun 26, 2013
4.8 / 5 (21) 1 | with audio podcast

Are weak values quantum? Don't bet on it

(Phys.org) —New work asserts that a key technique used to probe quantum systems may not be so quantum after all, according to Perimeter postdoctoral researcher Joshua Combes and his colleague Christopher ...

Sep 24, 2014
5 / 5 (20) 6

Atoms and molecules on the same wavelength

(Phys.org) —It may be surprising, but in physics the terrain of atoms and the territory of organic molecules are worlds apart. Therefore, in order to have a molecule communicate optically with atoms, the ...

May 13, 2014
4.7 / 5 (20) 2

The entropy of black holes

Yesterday I talked about black hole thermodynamics, specifically how you can write the laws of thermodynamics as laws about black holes. Central to the idea of thermodynamics is the property of entropy, which c ...

Sep 12, 2014
4.7 / 5 (20) 12