Group items tagged phononics - Advanced Concepts Team

Virtual phonons get real - physicsworld.com - 0 views

physicsworld.com/...virtual-phonons-get-real

analogue acosutics technology PHY science

shared by santecarloni on 07 Dec 12 - No Cached

santecarloni on 07 Dec 12

An acoustic analogue of the dynamical Casimir effect (DCE) has been demonstrated for the first time.

<div class="cArrow"> </div><div class="cContentInner">An acoustic analogue of the dynamical Casimir effect (DCE) has been demonstrated for the first time.</div>

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Technology Review: Blogs: arXiv blog: Physicist Discovers How to Teleport Energy - 4 views

www.technologyreview.com/...24759

tech phy quantum entanglement nrg

shared by Juxi Leitner on 09 Feb 10 - Cached

pacome delva liked it

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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Juxi Leitner on 09 Feb 10

wonder if we can use that to power a moon base .... or on-board a SBSP satellite

<div class="cArrow"> </div><div class="cContentInner">wonder if we can use that to power a moon base .... or on-board a SBSP satellite</div>

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...1 more comment...
LeopoldS on 09 Feb 10

will still have to read the actual article but am a bit sceptic if this interpretation really will hold ... what are our fundamental physicists saying about this?

<div class="cArrow"> </div><div class="cContentInner">will still have to read the actual article but am a bit sceptic if this interpretation really will hold ... what are our fundamental physicists saying about this?</div>

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Juxi Leitner on 10 Feb 10

I am not the physicist but I thought it might be interesting, from a space security point-of-view

<div class="cArrow"> </div><div class="cContentInner">I am not the physicist but I thought it might be interesting, from a space security point-of-view</div>

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pacome delva on 11 Feb 10

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...

<div class="cArrow"> </div><div class="cContentInner">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...</div>

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Interference of thermal waves - Can heat be controlled as waves? - 1 views

phys.org/...can-heat-be-controlled-as.html

technology PHY solid state thermal management science

shared by jcunha on 26 Jun 15 - No Cached

jcunha on 26 Jun 15

Imagine a material that only admits thermal conduction for certain temperatures. Martin Maldovan from Georgia Tech holds a tiny thermoelectric device that turns cold on one side when current is applied. Recent research has focused on the possibility of using interference effects in phonon waves to control heat transport in materials. These are exciting news (see Nature Materials paper here http://www.nature.com/nmat/journal/v14/n7/full/nmat4308.html). Heterostructure research lead to outstanding new possibilities when applied to electronic transport (e.g. in quantum well and quantum dots) and to photonics (e.g. Quantum Cascade Laser tunnable lasers). Apparently the time has come to see selective thermal control in this way! Truly exciting!!

<div class="cArrow"> </div><div class="cContentInner">Imagine a material that only admits thermal conduction for certain temperatures. Martin Maldovan from Georgia Tech holds a tiny thermoelectric device that turns cold on one side when current is applied. Recent research has focused on the possibility of using interference effects in phonon waves to control heat transport in materials. These are exciting news (see Nature Materials paper here <a href="http://www.nature.com/nmat/journal/v14/n7/full/nmat4308.html" rel="nofollow" target="_blank">http://www.nature.com/nmat/journal/v14/n7/full/nmat4308.html</a>). Heterostructure research lead to outstanding new possibilities when applied to electronic transport (e.g. in quantum well and quantum dots) and to photonics (e.g. Quantum Cascade Laser tunnable lasers). Apparently the time has come to see selective thermal control in this way! Truly exciting!!</div>

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Gizmo Converts Light Into Motion -- Cho 2009 (1020): 1 -- ScienceNOW - 1 views

sciencenow.sciencemag.org/...1

phy photonics phononics vibration

shared by pacome delva on 23 Oct 09 - Cached

A tiny ladderlike beam of silicon converts light into vibrations and vice versa with extremely high efficiency
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Dynamics of phononic dissipation at the atomic scale: Dependence on internal degrees of... - 0 views

scitation.aip.org/...GetabsServlet

nan

shared by ESA ACT on 24 Apr 09 - No Cached

ESA ACT on 24 Apr 09

Dynamics of dissipation local vibrations to the surrounding substrate is a key issue in friction between sliding surfaces as well as in boundary lubrication.

<div class="cArrow"> </div><div class="cContentInner">Dynamics of dissipation local vibrations to the surrounding substrate is a key issue in friction between sliding surfaces as well as in boundary lubrication.</div>

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Nanotube Phonon Waveguide - 0 views