Physicists have found a way to obtain quantum states using a magnetic field
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- Physicists have found a way to obtain quantum states using a magnetic field
Scientists from California Polytechnic State University (Cal Poly) have shown that periodic switching of a magnetic flux makes it possible to create quantum phases that do not exist in any static material. The study is published in the journal Physical Review B.
"On a global level, I would describe this as a step forward in understanding how time-dependent control is able to create and organize new forms of quantum matter. The key idea is that useful quantum properties are determined not only by the composition of the material, but also by how it is controlled over time," said Ian Powell, a lecturer at the Cal Poly Faculty of Physics.
Powell, together with research student Louis Buchelter, studied the behavior of matter at the level of atoms, electrons and photons. As part of the flocking engineering method, physicists periodically switched the value of the magnetic flux on the lattice between several values, and thus achieved the restructuring of the quantum system into topological phases that have no static analogues.
The researchers have shown that a properly selected field change mode makes quantum states more resistant to "noise" — random interference that disrupts the operation of quantum technologies. Additionally, mathematical patterns characteristic of more complex multidimensional quantum structures have been discovered in the system, which will make it possible to use relatively simple installations to study complex physics.
"I believe our results clearly demonstrate the possibilities of flock engineering for implementing quantum systems with widely tunable properties, paving the way for further research of periodically controlled quantum matter and the development of its practical applications," said Buchelter.
Magnetic fields are already being used to control qubits, the basic elements of quantum computers. The authors expect that the new method will expand the possibilities of controlling such systems, although experimental verification and adaptation of the results to real devices are still needed before industrial use. In the future, the development may affect quantum computing, pharmaceuticals and the financial industry.
In the magazine Phys.org On April 22, it was reported that Cornell University scientists had found out why a rare crystal, ruthenium chloride, behaved as if exotic particles lived inside it, capable of revolutionizing quantum computing. It turned out that there was a completely different physics behind it.
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