Posted on 10/19/2021 12:09:53 PM PDT by Red Badger
The central principle of superconductivity is that electrons form pairs. But can they also condense into foursomes? Recent findings have suggested they can, and a physicist at KTH Royal Institute of Technology today published the first experimental evidence of this quadrupling effect and the mechanism by which this state of matter occurs.
Reporting in Nature Physics, Professor Egor Babaev and collaborators presented evidence of fermion quadrupling in a series of experimental measurements on the iron-based material, Ba1−xKxFe2As2. The results follow nearly 20 years after Babaev first predicted this kind of phenomenon, and eight years after he published a paper predicting that it could occur in the material.
The pairing of electrons enables the quantum state of superconductivity, a zero-resistance state of conductivity which is used in MRI scanners and quantum computing. It occurs within a material as a result of two electrons bonding rather than repelling each other, as they would in a vacuum. The phenomenon was first described in a theory by, Leon Cooper, John Bardeen and John Schrieffer, whose work was awarded the Nobel Prize in 1972.
So-called Cooper pairs are basically “opposites that attract.” Normally two electrons, which are negatively-charged subatomic particles, would strongly repel each other. But at low temperatures in a crystal they become loosely bound in pairs, giving rise to a robust long-range order. Currents of electron pairs no longer scatter from defects and obstacles and a conductor can lose all electrical resistance, becoming a new state of matter: a superconductor.
Only in recent years has the theoretical idea of four-fermion condensates become broadly accepted.
For a fermion quadrupling state to occur there has to be something that prevents condensation of pairs and prevents their flow without resistance, while allowing condensation of four-electron composites, Babaev says.
The Bardeen-Cooper-Schrieffer theory didn’t allow for such behavior, so when Babaev’s experimental collaborator at Technische Universtät Dresden, Vadim Grinenko, found in 2018 the first signs of a fermion quadrupling condensate, it challenged years of prevalent scientific agreement.
What followed was three years of experimentation and investigation at labs at multiple institutions in order to validate the finding.
Babaev says that key among the observations made is that fermionic quadruple condensates spontaneously break time-reversal symmetry. In physics time-reversal symmetry is a mathematical operation of replacing the expression for time with its negative in formulas or equations so that they describe an event in which time runs backward or all the motions are reversed.
If one inverts time direction, the fundamental laws of physics still hold. That also holds for typical superconductors: if the arrow of time is reversed, a typical superconductor would still be the same superconducting state.
“However, in the case of a four-fermion condensate that we report, the time reversal puts it in a different state,” he says.
“It will probably take many years of research to fully understand this state,” he says. “The experiments open up a number of new questions, revealing a number of other unusual properties associated with its reaction to thermal gradients, magnetic fields and ultrasound that still have to be better understood.”
Reference: “State with spontaneously broken time-reversal symmetry above the superconducting phase transition” by Vadim Grinenko, Daniel Weston, Federico Caglieris, Christoph Wuttke, Christian Hess, Tino Gottschall, Ilaria Maccari, Denis Gorbunov, Sergei Zherlitsyn, Jochen Wosnitza, Andreas Rydh, Kunihiro Kihou, Chul-Ho Lee, Rajib Sarkar, Shanu Dengre, Julien Garaud, Aliaksei Charnukha, Ruben Hühne, Kornelius Nielsch, Bernd Büchner, Hans-Henning Klauss and Egor Babaev, 18 October 2021, Nature Physics. DOI: 10.1038/s41567-021-01350-9
Contributing to the research were scientists from the following institutions: Institute for Solid State and Materials Physics, TU Dresden, Germany; Leibniz Institute for Solid State and Materials Research, Dresden; Stockhom University; Bergische Universtät at Wuppertal, Germany; Dresden High Magnetic Field Laboratory (HLD-EMFL); Wurzburg-Dresden Cluster of Excellence ct.qmat, Germany; Helmholtz-Zentrum, Germany; National Institute of Advanced Industrial Science and Technology (AIST), Japan; Institut Denis Poisson, France.
Cher’s surgically enhanced 1971 boobs.
“Any sufficiently advanced technology is indistinquishable from magic” - Author C Clark
Localized superconductivity has been postulated as happening when LENR occur.
November 17, 2021 when SkyNet becomes aware...
I will check it out. Thank you
Or new glasses.......................
You know it's getting bad when the leftist wokesters have even perverted sub-atomic particles.
Thanks Red Badger!
*PING*
I knew it! They all laughed at me, but I knew it!
It's above my paygrade, too.
That's never stopped you (or me) in the past.
Perhaps it will in the future? CWIDT?
“Perhaps it will in the future? CWIDT?”
No for either of us, and how did you make text out of Wonder Woman’s jet?...
< font color=whitesmoke>CWIDT?</font>
And, no doubt, a particle accelerator that circles the world at the equator...So mathematics postulates that time doesn't appear to care which way it runs? Well, LOL, my mirror says otherwise.
It’s always something!
Surprised they haven’t added “S” to that, for swingers.
A telephone-book type of author list and not a single American author nor institution among them...
IAC, this is really good stuff...
Folks predicted “super-states” of matter in LENR circles when applying Babaev’s theory in the past.
Quote
Possibility of novel types of quantum fluid[edit]Presently known “super” states of matter are superconductors, superfluid liquids and gases, and supersolids. Egor Babaev predicted that if hydrogen and deuterium have liquid metallic states, they may have quantum ordered states which cannot be classified as superconducting or superfluid in the usual sense. Instead, they may represent two possible novel types of quantum fluids: “superconducting superfluids” and “metallic superfluids”. Such fluids were predicted to have highly unusual reactions to external magnetic fields and rotations, which might provide a means for experimental verification of Babaev’s predictions. It has also been suggested that, under the influence of magnetic field, hydrogen may exhibit phase transitions from superconductivity to superfluidity and vice versa.[12][13][14]
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