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
Nano-kirigami: 'Paper-cut' provides model for 3D intelligent nanofabrication
16.07.2018 | Chinese Academy of Sciences Headquarters
Theorists publish highest-precision prediction of muon magnetic anomaly
16.07.2018 | DOE/Brookhaven National Laboratory
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
16.07.2018 | Life Sciences
16.07.2018 | Earth Sciences
16.07.2018 | Physics and Astronomy