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Researchers demonstrate new type of laser:
Lasers are everywhere nowadays: doctors use them to correct eyesight, cashiers to scan your groceries, and quantum [scientists] to control qubits in the future quantum computer. For most applications, the current bulky, energy inefficient lasers are fine, but quantum scientist work at extremely low temperatures and on very small scales. For over 40 years, they have been searching for efficient and precise microwave lasers that will not disturb the very cold environment in which quantum technology works. A team of researchers led by Leo Kouwenhoven at TU Delft has demonstrated an on-chip microwave laser based on a fundamental property of superconductivity, the ac Josephson effect. They embedded a small section of an interrupted superconductor, a Josephson junction, in a carefully engineered on-chip cavity. Such a device opens the door to many applications in which microwave radiation with minimal dissipation is key, for example in controlling qubits in a scalable quantum computer. The scientists have published their work in Science on the 3rd of March.
Demonstration of an ac Josephson junction laser (DOI: 10.1126/science.aah6640) (DX)
(Score: 2) by q.kontinuum on Tuesday March 07 2017, @01:52PM (2 children)
They embedded a small section of an interrupted superconductor, a Josephson junction,
If a superconductor is required, it will only work in the very low temperature setups for now, right? Not e.g. for the shark-habitable water temperatures required to make it a viable fish head-mounted-device...
Registered IRC nick on chat.soylentnews.org: qkontinuum
(Score: 2) by c0lo on Tuesday March 07 2017, @02:05PM
I suspect they intend to beat IBM in the number of qubits rather than mount the maser on the head of a superconductor shark.
https://www.youtube.com/watch?v=aoFiw2jMy-0
(Score: 2) by JoeMerchant on Tuesday March 07 2017, @05:16PM
These are microwave lasers, not much use underwater, but should cook fillet of sole in a vacuum chamber quite efficiently due to lossless transmission from the cavity. Now, how to keep the fillet from drying out while under vacuum....?
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(Score: 4, Insightful) by GreatAuntAnesthesia on Tuesday March 07 2017, @02:19PM (5 children)
microwave laser
I believe the word you are looking for is "Maser".
to control qubits in the future quantum computer.
Let the time travel jokes begin.
(Score: 1, Funny) by Anonymous Coward on Tuesday March 07 2017, @04:56PM (4 children)
No, no, that's not how you do it. You start with the jokes and end with the statement allowing them.
(Score: 3, Funny) by bob_super on Tuesday March 07 2017, @05:26PM (1 child)
.joke the of end the with start just I
(Score: 0) by Anonymous Coward on Tuesday March 07 2017, @07:18PM
Yoda?
(Score: 2) by Hawkwind on Tuesday March 07 2017, @06:08PM (1 child)
is Josephson someone who takes AC trolls seriously?
(Score: 0) by Anonymous Coward on Tuesday March 07 2017, @06:26PM
^^^ THIS is what i came here to read, the only possible meaning for frikkin ac on this site. Oh and the comments about sharks.
(Score: 3, Interesting) by zeigerpuppy on Tuesday March 07 2017, @11:22PM
I had the pleasure of meeting Prof Josephson a few years back. I recall it as one of the most interesting conversations.
It's always intersesting to hear about new applications of his pioneering work. The Josephson Junction is the basis for quantum detectors used in a broad range of quantum experiments and also in SQUIDs which are used for neuroimaging (MEG).
I got the impression when speaking with Prof Josephson that he thought in a quite geometrical sense, almost like words were converted to a different symbolic space before being manipulated as a whole conceptual structure, it lead to a quite non-linear conversation that left me thinking that I'd only seen part of the larger ensemble.
(Score: 0) by Anonymous Coward on Thursday March 09 2017, @02:41AM
Microwave laser == maser.
Oh, btw the maser came before the laser.