Tuesday, August 15, 2017

I Bet You Won't Call This American Hero a Nut








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Monday, August 14, 2017

Not Science Fiction

No. This is not an excerpt from a Sci-fi movie.


China have teleported a photon 500 kilometers to orbiting satellite



China’s Micius satellite is a highly sensitive photon receiver that can detect the quantum states of single photons fired from the ground. Micius orbits at an altitude of 500 kilometers, and for most of this distance, any photons making the journey travel through a vacuum. To minimize the amount of atmosphere in the way, the Chinese team set up its ground station in Ngari in Tibet at an altitude of over 4,000 meters. So the distance from the ground to the satellite varies from 1,400 kilometers when it is near the horizon to 500 kilometers when it is overhead.
The Chinese team created entangled pairs of photons on the ground at a rate of about 4,000 per second. They then beamed one of these photons to the satellite, which passed overhead every day at midnight. They kept the other photon on the ground.
Finally, they measured the photons on the ground and in orbit to confirm that entanglement was taking place, and that they were able to teleport photons in this way. Over 32 days, they sent millions of photons and found positive results in 911 cases.
An arbitrary unknown quantum state cannot be precisely measured or perfectly replicated. However, quantum teleportation allows faithful transfer of unknown quantum states from one object to another over long distance, without physical travelling of the object itself. Long-distance teleportation has been recognized as a fundamental element in protocols such as large-scale quantum networks and distributed quantum computation. However, the previous teleportation experiments between distant locations were limited to a distance on the order of 100 kilometers, due to photon loss in optical fibres or terrestrial free-space channels.

An outstanding open challenge for a global-scale “quantum internet” is to significantly extend the range for teleportation. A promising solution to this problem is exploiting satellite platform and space-based link, which can conveniently connect two remote points on the Earth with greatly reduced channel loss because most of the photons’ propagation path is in empty space. Here, we report the first quantum teleportation of independent single-photon qubits from a ground observatory to a low Earth orbit satellite – through an up-link channel – with a distance up to 1400 km.

To optimize the link efficiency and overcome the atmospheric turbulence in the up-link, a series of techniques are developed, including a compact ultra-bright source of multi-photon entanglement, narrow beam divergence, high-bandwidth and high-accuracy acquiring, pointing, and tracking (APT). We demonstrate successful quantum teleportation for six input states in mutually unbiased bases with an average fidelity of 0.80+/-0.01, well above the classical limit. This work establishes the first ground-to-satellite up-link for faithful and ultra-long-distance quantum teleportation, an essential step toward global-scale quantum internet.


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Wednesday, August 02, 2017

Planet Earth's Last Hoorah?

'Biological annihilation:' Earth’s 6th mass extinction is underway

Doyle Rice, USA TODAY Published 4:31 p.m. ET July 10, 2017 | Updated 7:05 p.m. ET July 10,

Scientists can't agree if we're really in a mass extinction

Increased extinction rates and population losses might be signs of another mass extinction. But some researchers are doubtful. Video provided by Newsy Newslook


During the past 500 million years, there were five "mass extinctions" during which many species rapidly died.

Now scientists say we've entered a sixth mass extinction, and humans are the primary cause, according to a new study.

“This is the case of a biological annihilation occurring globally,” said co-author Rodolfo Dirzo, a professor of biology at Stanford University.

Previous mass extinctions were due to natural climate changes, huge volcanic eruptions or catastrophic meteor strikes. But this one is due to human activities such as deforestation, overpopulation, pollution, poaching and extreme weather events tied to man-caused global warming, the study said.

"The massive loss of populations and species reflects our lack of empathy to all the wild species that have been our companions since our origins," said the new study's lead author, Gerardo Ceballos of the National Autonomous University of Mexico. "It is a prelude to the disappearance of many more species and the decline of natural systems that make civilization possible."

STORY FROM CLUB MED

Sorry Rockies, we’re skiing the Alps this year

The study suggests that as much as 50% of the number of animal individuals that once shared Earth have disappeared. Researchers determined that billions of mammals, birds, reptiles and amphibian populations have been lost worldwide.

This amounts to "a massive erosion of the greatest biological diversity in the history of Earth," the authors said.

Particularly hard hit have been the mammals of south and southeast Asia, where all the large-bodied species of mammals analyzed lost more than 80% of their geographic ranges.

Even if it's far from extinction, a species in decline can cause "cascading effects on vegetation and habitat" in ecological networks that depend on balance between animals, plants and microorganisms, scientist Robin Naidoo of the World Wildlife Fund told CBS News.

At the conclusion of the study, the authors write that "the resulting biological annihilation obviously will have serious ecological, economic and social consequences. Humanity will eventually pay a very high price for the decimation of the only assemblage of life that we know of in the universe.”

"All signs point to ever more powerful assaults on biodiversity in the next two decades, painting a dismal picture of the future of life, including human life," the researchers said.

The study appeared Monday in the peer-reviewed journal Proceedings of the National Academy of Sciences.





ALSO CHECK OUT MY 2 BOOKS “THE SHAITAN” & “HOBO HANDBOOK: MEMOIRS OF A HOMELESS POET IN NEW YORK” SOLD AT THESE LOCATIONS:
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They are not being sold on Amazon.com at this time.

To view a few sample pages or to purchase the books visit:

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