He gives the example of a string of entangled ions oscillating back and forth in an electric field trap, a bit like Newton's balls. Measuring the state of the first ion injects energy into the system in the form of a phonon, a quantum of oscillation. Hotta says that performing the right kind of measurement on the last ion extracts this energy. Since this can be done at the speed of light (in principle), the phonon doesn't travel across the intermediate ions so there is no heating of these ions. The energy has been transmitted without traveling across the intervening space.
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Technology Review: Blogs: arXiv blog: Physicist Discovers How to Teleport Energy - 4 views
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wonder if we can use that to power a moon base .... or on-board a SBSP satellite
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I am not the physicist but I thought it might be interesting, from a space security point-of-view
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Yes it seems really interesting and opens new possibilities. However this technology review article is not very good and the guy uses terms which have a precise meaning (like teleportation), which is different from the word we know... Quantum teleportation is what we use for designing quantum computers, but we are quite far from any practical applications. This energy teleportation will allow new scheme involving energy (if it is experimentally confirmed) which is very nice. However it seems this occurs in an entangled many-body system, which the only macroscopic one I know is a bose-eintein condensate (BEC). So it would mean infuse energy in the BEC by doing a measurement on one of the atom and extract it few millimeters away by doing a measurement on another atom. very far from any long distance power transmission...
BEC coupled to mechanical oscillator - 0 views
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Treutlein and colleague’s work represents an important step forward in the use of ultracold atoms to study mechanical systems. "This experiment clearly demonstrates the possibility to use ultracold atomic systems as diagnostic tools and high-precision sensors, this is a very promising route of research," he said.
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nice!!!
Physics World reveals its top 10 breakthroughs for 2010 - 3 views
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BECs and Clocks, 6th and 7th place, metamaterials 4th place :)
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nice list! thanks Pacome!
Stimulated mutual annihilation: How to make a gamma-ray laser with positronium - 1 views
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Theorists expect that positronium, a sort of 'atom' consisting of an electron and an anti-electron, can be used to make a powerful gamma-ray laser. Scientists now report detailed calculations of the dynamics of a positronium BEC. This work is the first to account for effects of collisions between different positronium species.
Bosons bossed into Bose-Einstein condensate - physicsworld.com - 2 views
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I am so proud to have posted this days before Pacome has spotted it :-)
Bose-Einstein condensation of photons in an optical microcavity : Nature : Nature Publi... - 1 views
Slowed light breaks record - 0 views
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Kilometre-long pulses of light have been stored for over one second in a 0.1 mm cloud of ultracold atoms – before being revived and sent on their way. This latest demonstration of light storage using electromagnetically induced transparency (EIT) is the first to break the second barrier – using ultracold atoms and has the added bonus of preserving the quantum state of the incoming pulse. The physicists in the US who carried out the experiment say that the work could play a key role in quantum information technology.
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