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Ellie Anderson

Are We Still Evolving? - 0 views

www.pbs.org/...are-we-still-evolving.html

science research

shared by Ellie Anderson on 24 Oct 13 - Cached
  • Ellie Anderson on 24 Oct 13
     
    Inquiry: AN OCCASIONAL COLUMN The answer depends-and doesn't-on which humans you ask. "There has been no biological change in humans in 40,000 or 50,000 years. Everything we call culture and civilization we've built with the same body and brain." -Stephen Jay Gould I was surprised when I read these words from one of the 20th century's leading thinkers on evolutionary theory.
peterconnelly

'Quantum Internet' Inches Closer With Advance in Data Teleportation - The New York Times - 0 views

www.nytimes.com/...um-internet-teleportation.html

new york times internet

shared by peterconnelly on 02 Jun 22 - No Cached
  • From Santa Barbara, Calif., to Hefei, China, scientists are developing a new kind of computer that will make today’s machines look like toys.
  • the technology will perform tasks in minutes that even supercomputers could not complete in thousands of years.
  • The new experiment indicates that scientists can stretch a quantum network across an increasingly large number of sites. “We are now building small quantum networks in the lab,” said Ronald Hanson
  • ...8 more annotations...
  • Quantum teleportation — what he called “spooky action at a distance” — can transfer information between locations without actually moving the physical matter that holds it.
  • This technology could profoundly change the way data travels from place to place. It draws on more than a century of research involving quantum mechanics, a field of physics that governs the subatomic realm and behaves unlike anything we experience in our everyday lives. Quantum teleportation not only moves data between quantum computers, but it also does so in such a way that no one can intercept it.
  • These entangled systems could be electrons, particles of light or other objects. In the Netherlands, Dr. Hanson and his team used what is called a nitrogen vacancy center — a tiny empty space in a synthetic diamond in which electrons can be trapped.
  • Traditional computers perform calculations by processing “bits” of information, with each bit holding either a 1 or a 0. By harnessing the strange behavior of quantum mechanics, a quantum bit, or qubit, can store a combination of 1 and 0 — a little like how a spinning coin holds the tantalizing possibility that it will turn up either heads or tails when it finally falls flat on the table.
  • Researchers believe these devices could one day speed the creation of new medicines, power advances in artificial intelligence and summarily crack the encryption that protects computers vital to national security. Across the globe, governments, academic labs, start-ups and tech giants are spending billions of dollars exploring the technology.
  • Although it cannot move objects from place to place, it can move information by taking advantage of a quantum property called “entanglement”: A change in the state of one quantum system instantaneously affects the state of another, distant one.
  • “It does not work that way today. Google knows what you are running on its servers.”
  • The information also cannot be intercepted. A future quantum internet, powered by quantum teleportation, could provide a new kind of encryption that is theoretically unbreakable.
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