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Identical photons have a distance of 150 million kilometers

Enlarge / Nearby source of quantum photons. By the middle of the 20th century the light was quite ordinary. Yes, it was both a particle and a wave, but it did not do anything very strange. Then scientists underemployed after the end of World War II began to pay more attention to the properties of light. This was partly due …

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The most energetic photons ever captured by the Crab Nebula

The Crab Nebula. Picture credits: NASA A very large research team working with several institutions in China and Japan has measured the highest ever measured energy photon. In their article, published in the journal Physical Review Letters the group describes their study of data from the Tibet Air Shower Gamma Collaboration and what they found. The Tibet Air Shower Gamma …

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Generating high-quality single photons for quantum computing

With researchers have designed a new single-photon emitter that generates at room temperature, more than high-quality photons that could be useful for quantum communications , and other quantum devices. Credit: Massachusetts Institute of Technology              MIT researchers have designed a way to generate, at room temperature, more single photons for carrying quantum information. The design, they say, holds promise for …

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Entanglement of photons of different colors

By carefully constructing the geometry of a micron-scale annular resonator, researchers at NIST produced pairs of entangled photons (light particles) that have two very different colors or wavelengths. Light from a pump laser (purple areas in the resonator) produces a photon in each pair at visible wavelength of light (red spots in and around the resonator); The other photon has …

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Astronomers count all photons in the universe. Spoiler Alert: 4,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 photons

Imagine that you are in a boat on a big ocean, the water reaching to the far horizon, with the slightest hints of land immediately behind it. It is morning, just before sunrise, and thick fog has formed along the coast. While the cold holds you to your early watch, you catch a lighthouse that flickers faintly through the fog …

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