New quantum supplies provide novel path to Three-D digital gadgets



IMAGE: Picture: a) By native manipulation of fabric parameters, it’s potential to tune the properties of cost carriers in Weyl semimetals; b) With appropriate native manipulation of fabric parameters, one…
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Credit: Teemu Ojanen

Researchers have proven how the ideas of common relativity open the door to novel digital functions resembling a three-dimensional electron lens and digital invisibility gadgets. In a brand new examine funded by the Academy of Finland, Aalto University researchers Alex Westström and Teemu Ojanen suggest a technique to transcend particular relativity and simulate Einstein’s idea of common relativity in inhomogeneous Weyl semimetals. The idea of Weyl metamaterials combines concepts from solid-state physics, particle physics and cosmology and factors a strategy to fabricate metallic designer supplies the place cost carriers transfer like particles in curved space-time.

The researchers suggest Weyl metamaterials, a generalisation of Weyl semimetals, that allow new sorts of digital gadgets via geometry engineering.

“The systems we introduced offer a route to make the charge carriers move as if they were living in a curved geometry, providing a tabletop laboratory for simulating curved-space quantum physics and certain cosmological phenomena,” Alex Westström explains.

Weyl semimetals are an instance of lately found quantum supplies which have acquired lots of consideration. Charge carriers in these supplies behave as in the event that they had been mbadless particles transferring on the pace of sunshine.

“We discovered that Weyl metamaterials may serve as a platform for exotic electronic devices such as the 3D electron lens, where the trajectories of charge carriers are focused much like beams of light in an optical lens,” Teemu Ojanen says.

The electrical conduction in Weyl semimetals displays the physics of Einstein’s particular idea of relativity. Nevertheless, particular relativity additionally badumes an absence of gravity, which Einstein formulated as a geometry of space-time.

The idea of Weyl metamaterials additionally paves the way in which for essentially new electronics functions, for example, the event of digital invisibility gadgets. The key thought behind the potential functions is an artificially created curved geometry, which bends the movement of cost carriers in a managed approach.

“In optics, it’s been known for centuries that light always chooses the quickest trajectory. In curved geometry, the quickest path doesn’t look like a straight line for those watching from outside. The functionality of optical invisibility devices, where the beams of light bypbad a hidden object, is in fact based on the application of curved-space geometry. It would be a breakthrough in fundamental research to achieve a similar functionality in electronic systems,” Ojanen provides.


The badysis outcomes had been revealed in Physical Review X. The examine was carried out at Aalto University’s Department of Applied Physics, within the group Theory of Quantum Matter.


Alex Westström and Teemu Ojanen: Designer curved-space geometry for relativistic fermions in Weyl metamaterials Physical Review X 7 2017,, DOI: 10.1103/PhysRevX.7.041026


Academy of Finland Communications

Leena Vähäkylä, Communications Specialist

tel. +358 295 335 068


Picture: a) By native manipulation of fabric parameters, it’s potential to tune the properties of cost carriers in Weyl semimetals; b) With appropriate native manipulation of fabric parameters, one can tailor the provider movement and design novel digital gadgets such because the electron lens, which focuses the incoming carriers.

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