Search results for spontaneous coherence

General Physics May 10, 2018

Profiling extreme beams: Scientists devise new diagnostic for cutting-edge and next-gen particle accelerators

The world's cutting-edge particle accelerators are pushing the extremes in high-brightness beams and ultrashort pulses to explore matter in new ways.

Plasma Physics Mar 16, 2018

Chirping is welcome in birds but not in fusion devices—scientists show that weak turbulence makes chirping more likely

Birds do it and so do doughnut-shaped fusion facilities called "tokamaks." But tokamak chirping— a rapidly changing frequency wave that can be far above what the human ear can detect—is hardly welcome to researchers who ...

Social Sciences Feb 8, 2018

Nostalgia safeguards against negative feelings

Donald Trump's campaign slogan resonated deeply with many Americans. Notions of America's greatness and moral superiority have a long tradition and are deeply engrained in the country's culture. Such ideas are often projected ...

Nanophysics Oct 6, 2017

Researchers observe exotic quantum particle in bilayer graphene

October 5, 2017—A team led by Cory Dean, assistant professor of physics at Columbia University, and James Hone, Wang Fong-Jen Professor of Mechanical Engineering at Columbia Engineering, has definitively observed an intensely ...

Optics & Photonics Sep 18, 2017

Optical and electrical bistability study sheds light on next-gen high speed data transfer

Today, electrical bistable devices are the foundation of digital electronics, serving as building blocks of switches, logic gates and memories in computer systems. However, the bandwidth of these electronic computers is limited ...

Condensed Matter May 30, 2017

Physicists discover why drying liquid crystal drops leave unusual 'coffee rings'

In previous papers, University of Pennsylvania physicists investigated the "coffee ring effect," the ring-shaped stain of particles left after drops of coffee evaporate. In one paper, they learned how to undo this effect ...

Quantum Physics Feb 15, 2017

New technique for creation of entangled photon states

Members of the Faculty of Physics at the Lomonosov Moscow State University have elaborated a new technique for creating entangled photon states. They have described their research in an article published in the journal Physical ...

Optics & Photonics Feb 13, 2017

Coherence of Raman light arises from disorder

Light propagation in disordered materials is a topic of great interest for the scientific community, with applications in the fields of photonics and renewable energies and the discovery of fascinating new phenomena related ...

Optics & Photonics Jan 19, 2017

Physicists observe spontaneous symmetry breaking in an optical microcavity

Symmetry is the essential basis of nature, which gives rise to conservation laws. In comparison, the breaking of the symmetry is also indispensable for many phase transitions and nonreciprocal processes. Among various symmetry ...

Optics & Photonics Dec 5, 2016

Tunneling holds key to high-speed modulation of transistor and laser development

In 2004, electrical engineering pioneers Nick Holonyak, Jr. and Milton Feng at the University of Illinois invented the transistor laser—a three-port device that incorporated quantum-wells in the base and an optical cavity—increasing ...

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