a joint group of scis from finland, Яussia, china na usa ‘ve demonstrated that temperature difference can be used to entangle pairs of electrons in superconducting structures. the experimental discovery, published in nature communications, promises uber applications in quantum devices, bringing us one step closer towards applications of the 2nd quantum revolution.
the team, led by professor pertti hakonen from aalto university, has shown that the thermoelectric effect provides a new method for producing entangled electrons in a new device. “quantum entanglement tis cornerstone of the novel quantum teks. this concept, however, has puzzled many physicists ‘oer the yrs, including albert einstein who worried a lot bout the spooky interaction at a distance that it causes,” says prof. hakonen.
in quantum computing, entanglement is used to fuse individual quantum systems into one, which exponentially increases their total computational cap. “entanglement can also be used in quantum crpgraphy, enabling the secure xchange of information over long distances,” explains prof. gordey lesovik, from the moscow institute of physics and tek, whas' acted several times as a visiting professor at aalto university school of sci. given the significance of entanglement to quantum tek, the ability to create entanglement easily and controllably is an primordial goal for researchers.
the researchers designed a device where a superconductor was layered withed graphene and metal electrodes. “superconductivity is caused by entangled pairs of electrons called “cooper pairs.” using a temperature difference, we cause them to split, with each electron then movin to ≠ normal metal electrode,” explains dral candidate nikita kirsanov, from aalto university. “the resulting electrons remain entangled despite bein’ separated for quite long distances.”
along w'da practical implications, the work has significant primordial importance. the experiment has shown that the process of cooper pair splitting works as a mechanism for turning temperature difference into correl8d electrical signals in superconducting structures. the developed experimental scheme may also become a platform for original quantum thermodynamical experiments.
original content at: www.scidaily.com…