Quantum Millilayer: Chromium-based materials bring new magnetic breakthroughs to quantum computing

[ Gearbest Technology News]According to overseas media reports, researchers have brought a more feasible new quantum computing and sensing solution – to realize more lasting quantum states by manipulating the magnetic switches of materials, injecting new impetus into the development of quantum computers.

This research focuses on chromium sulfide, a material. Because its atomic layer is ultra-thin and stacked, researchers compared it to a thousand-layer crispy layer. This material demonstrates a powerful ability in quantum information storage, and can store quantum information with charges, photons, magnetism, and even sound-like vibrations (phonons). What really excites physicists is that it can lock quantum data through magnetron excitons.

Picture source network

Excitons are not new, and when photons excite electrons and leave holes behind them, they form. However, excitons perform very strangely in this material. At a low temperature of about 132 Kelvin (ie -141 degrees Celsius), the atomic layer of chromium bromide is magnetized, and the magnetic field directions of adjacent atomic layers are opposite to each other. Once the temperature exceeds this critical value, the magnetism disappears and the excitons can move freely in the material.

It is worth noting that since the material is only thick with one atomic layer, the excitons are confined to a line and cannot wander around at will. This one-dimensional “tight clothes”-like constraint reduces external interference and allows quantum information to be stored for more lasting and not easily dissipated.

In a new study published on February 19 in the journal Nature Materials, researchers irradiated the material with 20 ultra-short infrared laser pulses, and then excited the excitons to a higher energy state with another laser. Surprisingly, they got two different types of excitons, and there was only one originally expected.

The key lies in the direction of the laser. The laser light is emitted from different angles, and the excitons are either arranged neatly in a row or spread into a three-dimensional chaos. This difference has become a “gold mine” with increased stability.

“Magnetic sequence is the new regulatory knob that shapes excitons and their interactions, which may bring about changes in future electronics and information technologies,” said Rupert Huber, professor of experimental and applied physics at the University of Regensburg.

Currently, the research team is working to explore whether these excitons can be converted into magnetic spin excitation. If possible, free exchange of quantum information can be achieved between light, spin and charge. “In the long run, we are expected to build quantum machines or devices that utilize photons to transmit information, electrons to process information through interactions, magnetic storage, and phonon modulation and conversion of information to new frequencies, and even leverage all three or four characteristics at the same time,” said Makilo Kra, a professor of electrical and computer engineering at the University of Michigan.

magicCubeFunc.write_ad(“dingcai_top_0”);