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Magnetic monopoles in a cold quantum gas medium

23.07.2018

It is known that magnets shaped like a ball, rectangle or horseshoe always have two magnetic poles. And if you split the magnet into two parts, you get two new magnets with two poles. However, according to some physical theories, unipolar magnetic formations can exist in the world, similar to electric charges, which are either positive or negative. One of these magnetic formations, the Young's monopole, may exist from the point of view of high-energy physics, but none of the scientists has yet had a chance to "see" this monopole live, even in laboratory conditions.

A group of physicists from the Joint Quantum Institute (JQI) succeeded for the first time in creating an analogue of the Yang monopole based on a quantum gas from supercooled rubidium atoms. And this achievement can be used in the future for a deeper insight into already known areas of physics and new areas that have not yet been covered by human science.

In order to detect the Yang monopoles that exist in a quantum gas, scientists, using radio waves and microwave rays, aligned all the spins of quantum gas atoms in a special way. Periodically repeating combinations of four different orientations of rotation of atoms, the researchers made these atoms move in space-time, while each atom returned to the starting point after a while.

As each atom completed its full circle, the scientists measured its spin and compared it to its original spin. It was found that the spin of the atom did not correspond to the original, and small differences, according to the assumptions, could arise due to the fact that the atoms moved in a curved space-time continuum. Having calculated the parameters of the curvature of the continuum, the scientists determined that they exactly correspond to the curvature created, from the point of view of the theory, by the Young monopole.

In order to test that the curvature of the continuum is indeed caused by the presence of a Yang monopole, the researchers made the atoms move in different ways, even those that should go around the area of ​​\uXNUMXb\uXNUMXbthe curvature and distortion created. The atoms moving along this path, returning to the starting point, had the same spin as at the very beginning, which indicated that they managed to avoid the influence of the monopole.

Using the approach described above and directing the atoms in different ways, the researchers determined that the Yang monopole is a topological phenomenon, i.e. it has a certain size and shape. And in their further research, scientists will find out how it will be possible to make Yang's monopoles work for the benefit of mankind in a wide variety of quantum technologies.

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Digital TV Tuner for Xbox One 21.10.2014

Microsoft Corporation announced the start of sales in several European countries of the Xbox One Digital TV Tuner accessory for the Xbox One game console.

The named device is an external digital TV tuner. It is equipped with a USB port for connecting to a game console, as well as a socket for a coaxial antenna cable. The device gives the game console the functions of working with TV programs without the need for an external TV receiver with an HDMI interface.

After connecting the Xbox One Digital TV Tuner to the set-top box, users will be able to pause the broadcast and then resume watching. In Snap Mode, you can watch the program in a small window, using the remaining screen space for the game. If you have a Kinect controller, voice control for watching TV programs will become available. Finally, it is possible to broadcast a TV program to a smartphone or tablet via a home network.

The Xbox One Digital TV Tuner is currently available in the UK, Germany, France, Spain and Italy for an estimated price of €30.

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