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
NASA plans twin sounding rocket launches over Norway this winter
25.11.2015 | NASA/Goddard Space Flight Center
Ground-breaking research could challenge underlying principles of physics
23.11.2015 | University of Southampton
Nerve cells cover their high energy demand with glucose and lactate. Scientists of the University of Zurich now provide new support for this. They show for the first time in the intact mouse brain evidence for an exchange of lactate between different brain cells. With this study they were able to confirm a 20-year old hypothesis.
In comparison to other organs, the human brain has the highest energy requirements. The supply of energy for nerve cells and the particular role of lactic acid...
In laser material processing, the simulation of processes has made great strides over the past few years. Today, the software can predict relatively well what will happen on the workpiece. Unfortunately, it is also highly complex and requires a lot of computing time. Thanks to clever simplification, experts from Fraunhofer ILT are now able to offer the first-ever simulation software that calculates processes in real time and also runs on tablet computers and smartphones. The fast software enables users to do without expensive experiments and to find optimum process parameters even more effectively.
Before now, the reliable simulation of laser processes was a job for experts. Armed with sophisticated software packages and after many hours on computer...
Researchers at Heidelberg University have devised a new way to study the phenomenon of magnetism. Using ultracold atoms at near absolute zero, they prepared a...
AWI researchers’ unique 15-year observation series reveals how sensitive marine ecosystems in polar regions are to change
The warming of arctic waters in the wake of climate change is likely to produce radical changes in the marine habitats of the High North. This is indicated by...
Berkeley Lab researchers develop nanoparticles that can carry therapeutics across the brain blood barrier
Glioblastoma multiforme, a cancer of the brain also known as "octopus tumors" because of the manner in which the cancer cells extend their tendrils into...
25.11.2015 | Event News
17.11.2015 | Event News
21.10.2015 | Event News
25.11.2015 | Event News
25.11.2015 | Earth Sciences
25.11.2015 | Physics and Astronomy