The discovery was achieved by researchers at Vienna University of Technology (TU Wien) in Austria, who worked together with ...

Can quantum systems become more disordered, as thermodynamics would predict? Yes, they can - if a proper definition of "entropy" is used. It is one of the most important laws of nature that we know: ...

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

Almost exactly 200 years ago, French physicist Sadi Carnot determined the maximum efficiency of heat engines. The Carnot ...

A team of scientists has developed a recipe for black holes that eliminates one of the most troubling aspects of physics: the central singularity, the point at which all our theories, laws and models ...

In classical physics, anything driven hard enough will eventually heat up, lose coherence, and settle into disorder. A new ...

Schematic of a single photon with zero angular momentum (green) splitting into two photons (red) with either zero or opposite angular momenta (sketched through the spatially varying color), which adds ...

Physicists have long sensed that the usual picture of events unfolding as a sequence of causes and effects doesn’t capture the fundamental nature of things. They say this causal perspective probably ...

Quantum technologies could transform society—but their national and economic security implications also bring complex legal hurdles. To help innovators navigate those challenges, the Chicago Quantum ...

Researchers have designed a new device that can efficiently create multiple frequency-entangled photons, a feat that cannot be achieved with today's optical devices. The new approach could open a path ...