Phys. Rev. Focus27, 5 (2011) – Published February 4, 2011
Time travel isn’t forbidden by physical laws. A new consistency condition for time traveling quantum states eliminates any possibility of so-called grandfather paradoxes, in which a time-traveler kills her own ancestor.
Phys. Rev. Focus25, 7 (2010) – Published February 26, 2010
The turbulent atmosphere is better than an equivalent glass fiber when it comes to preserving quantum information in long-distance light signals, according to a new analysis. For brief moments, light can propagate relatively undisturbed.
Phys. Rev. Focus24, 7 (2009) – Published August 17, 2009
Real-world events always proceed in the direction of increasing entropy, even though the laws of physics don’t require it. The reason we never see events that reduce entropy is that they cannot leave behind any evidence of having happened, according to a new theory.
Phys. Rev. Focus6, 20 (2000) – Published November 3, 2000
A specially prepared Bose-Einstein condensate would produce oppositely directed beams of entangled atoms, which could be used for investigations of entanglement and quantum information theory. In the past only beams of entangled photons have been produced.