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Someone call Nature! I think they have cracked the holy grail of physics!GotTheBug said:https://www.youtube.com/watch?v=rOdTDkgEdAY
Total fake / doesn't understand the basic concept of magnetic theory. That video failed within seconds... if you shrink a magnet down so you get the south and north pole close together you still have a dipole. A monopole magnet would have only field lines going out or in, not both.JHS said:Here is another,
https://www.youtube.com/watch?v=xR6Qait2JGY
there are many more.
I do not know if they are fake or not.
john
I find it interesting as to our point of view there is just one pole and in a practical sense is acting as a mono pole magnet.g_axelsson said:Interesting metamaterial, but not a monopole.
Göran
There are images of it at http://www.nature.com/articles/srep12488 under the figures tab.The parts composing the wormhole are shown in Fig. 1b (see also Supplementary Information). The
core of the device is the magnetic hose made of a foil of high-permeability mu-metal, folded into a spiral.
This is surrounded by the spherical superconducting layer, made of high-temperature superconducting
strips glued to a spherical former to provide a tessellation of the sphere. On top of it, there is an outer
ferromagnetic layer, ideally made of a homogenous material with permeability μ2 given by Eq. (1), and
very small thickness. Such effective permeability is achieved by a strategy reminiscent of the metasurfaces
used for light manipulation28. An array of high-permeability mu-metal plates is specially arranged as to
provide the required magnetic response, following an optimization process based on a 3D-numerical
simulation of the whole device (see Supplementary Information)
g_axelsson said:If you read the original Nature article (I just did it) you realize that there is no secret dimension or a magnetic monopole. The device consists of a large ball with carefully wrapped supra conductors and iron sheets that cleverly compensates for the distortion of an external magnetic field while piping the internal field through a rolled up ferromagnetic sheet in the center.
This can make one side of the magnetic field look like it appear from a magnetic monopole, but the other side of the sphere has the normal dipole magnet whose field is transferred through the "magnetic tube". The field lines from the external magnet looks like it comes from a pair of monopoles, one south and one north, just stretched out by a sphere in the middle.
The nifty thing is that the sphere doesn't affect external magnetic fields so you can make local magnetic measurements like it really is a monopole inside an external field. But as soon as you back off and measure an area larger than the sphere, the other side of the tube shows up and the dipole field is there again.
So, no secret dimensions, all is happening in real space. It is just for the magnetic fields that it looks like there is a local monopole, it's a magnetic mirage.
And no monopole, it's a magnetic tube, capable of projecting a magnetic field to the other side of a sphere.
It just shows that we (I mean science) really understands magnetic fields and how they work.
Göran
For a bit deeper info the article ( DOI: 10.1038/srep12488 ) contains the following description of the device.
There are images of it at http://www.nature.com/articles/srep12488 under the figures tab.The parts composing the wormhole are shown in Fig. 1b (see also Supplementary Information). The
core of the device is the magnetic hose made of a foil of high-permeability mu-metal, folded into a spiral.
This is surrounded by the spherical superconducting layer, made of high-temperature superconducting
strips glued to a spherical former to provide a tessellation of the sphere. On top of it, there is an outer
ferromagnetic layer, ideally made of a homogenous material with permeability μ2 given by Eq. (1), and
very small thickness. Such effective permeability is achieved by a strategy reminiscent of the metasurfaces
used for light manipulation28. An array of high-permeability mu-metal plates is specially arranged as to
provide the required magnetic response, following an optimization process based on a 3D-numerical
simulation of the whole device (see Supplementary Information)
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