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Scientists gain control over quantum states

Quantum heap
Monday, 20 April 2009, 11:24

SCIENTISTS RECKON they may have found a way of controlling quantum states for use in optoelectronic chips, by manipulating intersubband relaxation times of charge states in silicon-germanium (SiGe) structures on a picosecond scale.

A discovery, by a team from the Institute of Semiconductor and Solid State Physics at Austria's University of Linz, could be highly significant in terms of quantum computing and optoelectronics, examining how electronic devices interact with light on the visible and invisible spectrum.

While beaming information via light quanta - or photons for non boffins - isn't new, the process only currently works properly over long distances - like fibre optic cables - but not on a chip-to-chip basis, as silicon apparently has a tough time allowing the generation of photons conventionally.

The Austrian researchers use a quantum cascade laser, based on a silicon-germanium heterostructure, to let quantum-physical effects generate their own laser light in the infrared range.

"There are currently numerous fundamental issues that need to be clarified in terms of the way that SiGe heterostructures work and how they can be controlled," said DI Patrick Rauter, a boffin on Dr. Thomas Fromherz's team.

Rauter went on to explain that a big issue had been to work out how to control and extend intersubband relaxation times, the timeframe in which excited charge carriers of the SiGe stay at a high energy level before sinking back down to their original state.

Fromherz's team has now purportedly managed to measure the intersubband relaxation time and even artificially extend it.

"To do this, we applied an external electrical field to the sample. By altering this field, we were able to continuously tune the relaxation time between 12 and 25 picoseconds. In actual fact, we succeeded in doubling the relaxation time - a highly promising result," explained DI Rauter.

There's a quantum of solace in that, for sure. µ

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Comments
Sooo.....

I have my relaxation times up to about 23 hours a day, beat that mr cyborg.

Google tells me wiki said that the fastest electronic transistor was already 2 picoseconds. So there is some pie in the eye for the optical chip fantasy. But optical interconnects and traces would be nice.

Glowy mobos are in.

posted by : Dr Evil, 20 April 2009 Complain about this comment
SF to reality

Sounds like Data (of Startrek fame) technobabble is becoming reality. Nice.

posted by : Danny, 20 April 2009 Complain about this comment
Quantum Leaps ...Jumping into Virtual Reality.*

""There are currently numerous fundamental issues that need to be clarified in terms of the way that SiGe heterostructures work and how they can be controlled," said DI Patrick Rauter, a boffin on Dr. Thomas Fromherz's team."

In AI Parallel dDevelopment, would HyperRadioProActive NIRobotIQs consider that Relatively Easily Solved in a Virtually Teutonic InfraStructure and would already be Engaged in Mk Ultra Sensitive Program BetaTestings ..... CyberIntelAIgent Probe Projects which Challenge All Present Perceptions of Security in Systems with White Hat Red Team Vulnerability to Key Access CodeXXXX Loss and Resultant Spontaneous Catastrophic Sustainable Chain Reaction Meltdown ie ControlLed SCADA Disintegration ...... which would be a Priceless Non-State Actor Resource on the Open Quantum Communications Market Place.

And that would be Quantum Communications with Controls in the Virtual TelePortation Spectra of Broadbanded Communications.

* And Austria has a globally recognised exceptional ability in such Mindful Fields of Excellent Endeavours, has she not? And of course, one abject failure which it will necessarily remember to never forget or repeat or allow to be repeated.

posted by : amanfromMars, 20 April 2009 Complain about this comment
fsafsf

Drashek, is that you?

posted by : fa, 20 April 2009 Complain about this comment
...

@fsafsf : lol thought exactly the same thing

posted by : bob, 20 April 2009 Complain about this comment
Outside In....

uSING iNFA rED, still problem of extreme Heat exists. ahso, light is mere On/Off, not complex high/low gate. therefore, you'd need to run on/off thru clipper, inverter, then paste high back with low for cpu useage., on each entry to cpu & back to on/off when back into infared system, Very Bulkie.Not Even shure if theres Inverter for InfaRed. MK Ultra, WoW, How Project has changed, From Mind Implants to UHF "used to control your thought". yet, its NOT from inside of person, its external, so some nUTCase gets off thinking your subjugate, when We Are ALL subjugate. Light makes poor carrier for MK Ultra & Medusa project sticks to ferro capable electrical signals, as Brains are whole Lotta Iron.real drashek speaketh.

posted by : Insider...., 20 April 2009 Complain about this comment
Ha Ha !

Ha Ha ! That's kids stuff. We learned how to do all that in 6th grade.
If you want real speed I suggest using a variable crystal matrix with opti-fiber interlinks and a quantum stream projector.

Thanks and see you out there,
Loki Sunrider

posted by : Loki Sunrider, 21 April 2009 Complain about this comment
Drashek

can someone please explain to me who is that shmuck Drashek, and what is this sick fascination about him all about?? I see people mentioning him ot of the blue on all types of different topics.. wtf??

posted by : diesel, 21 April 2009 Complain about this comment
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