Researchers observe quantum interferences in real-time using a new extreme ultra-violet light spectroscopy technique.

Many physicists have attempted to explain the problem of quantum superposition, as exemplified by Schrödinger's cat. Now a French theoretical physicist proposes a novel possible solution, which combines two different approaches and brings in universal gravitation.

Photonic integration has focused on communications applications traditionally fabricated on silicon chips, because these are less expensive and more easily manufactured, and researchers are exploring promising new waveguide platforms that provide these same benefits for applications that operate in the ultraviolet to the infrared spectrum. These platforms enable a broader range of applications, such as spectroscopy for chemical sensing, precision metrology and computation.

Crystalline materials known as topological insulators conduct surface current perfectly, except when they don't. In two new studies published in the journal Science, researchers explain how these 'fragile' poorly conducting topological states form, and how conductivity can be restored.

Researchers have made a breakthrough in the control of terahertz quantum cascade lasers, which could lead to the transmission of data at the rate of 100 gigabits per second -- around one thousand times quicker than a fast Ethernet operating at 100 megabits a second.