A Catalan, German and Austrian group of physicists has developed a new technology to transfer magnetic fields to arbitrary long distances, which is comparable to transmitting and routing light in optical fibers.
Oriol Romero-Isart and his colleagues have theoretically proposed and already tested this new device experimentally. The field of possible applications is broad and includes spintronic and quantum computers among others.
In today’s high-tech world, transferring electromagnetic waves is essential for many technologies. This can be seen with information being circulated worldwide via optic fibers. However, a device capable of doing this with static magnetic fields does not exist as the transferred field rapidly decays with distance from the source. In Innsbruck, theoretical physicist Oriol Romero-Isart and his colleagues have now found a surprisingly simple solution for this problem.
“Our theoretical studies have shown that we need a material with extreme anisotropic properties to transfer and route static magnetic fields,” explains theoretical physicist Romero-Isart. This means that the material has to have extremely good permeability in one direction but zero in the perpendicular direction. Since no material exists with such extreme anisotropy, the physicists designed a different strategy: They used a ferromagnetic cylinder and wrapped it with a superconductor shell. “Superconductors are perfect magnetic insulators,” explains Romero-Isart. The researcher’s calculations showed that a structure of alternated superconducting and soft ferromagnetic concentric cylindrical layers could transfer more than 90% of the magnetic field to any distance. Remarkably, the researchers also calculated that up to 75 % of the magnetic field can be transferred by using only a bilayer scheme – a ferromagnetic core with a superconducting outer layer.
After theoretically proposing this scheme, the team experimentally demonstrated such a device. They wrapped a ferromagnet made of cobalt and iron with a high-temperature superconductor and conducted several tests. “Even though our technical set-up wasn’t perfect, we could show that the static magnetic field is transferred well by the hose,” says Prof. Sanchez, the Catalan group leader of Oriol Romero-Isart’s collaborators.
This new method could be used, for example, for future quantum technology coupling distant quantum systems magnetically, applications in spintronics and other nano technologies.
The work of the physicists from the Universitat Autonoma de Barcelona, the Max-Planck-Institute of Quantum Optics, the Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences and the Institute for Theoretical Physics of the University of Innsbruck has been published in the renowned journal Physical Review Letters. The project is funded by the European Union and the European Research Council among others.
Publication: Long-distance Transfer and Routing of Static Magnetic Fields. C. Navau, J. Prat-Camps, O. Romero-Isart, J. I. Cirac, and A. Sanchez. Phys. Rev. Lett. 112, 253901
DOI: 10.1103/PhysRevLett.112.253901 (arXiv:1304.6300v2)
Univ.-Prof. Dr. Oriol Romero-Isart
Institute for Quantum Optics and Quantum Information
Austrian Academy of Sciences
phone: +43 512 507 4730
University of Innsbruck
phone: +43 512 507 32022
http://dx.doi.org/10.1103/PhysRevLett.112.253901 - Long-distance Transfer and Routing of Static Magnetic Fields. C. Navau, J. Prat-Camps, O. Romero-Isart, J. I. Cirac, and A. Sanchez. Phys. Rev. Lett. 112, 253901
http://arxiv.org/abs/1304.6300v2 - arXiv:1304.6300v2
http://iqoqi.at/en/group-page-romero-isart - Quantum Nanophysics, Optics and Information
Dr. Christian Flatz | Universität Innsbruck
New NASA study improves search for habitable worlds
20.10.2017 | NASA/Goddard Space Flight Center
Physics boosts artificial intelligence methods
19.10.2017 | California Institute of Technology
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
20.10.2017 | Information Technology
20.10.2017 | Materials Sciences
20.10.2017 | Interdisciplinary Research