2D Material Identified That Can Store Quantum Information at Room Temperature

Isolated Spins on Hexagonal Boron Nitride

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Artistic performance of separated spins on hexagonal boron nitride under an optical microscopic lense. Credit: Qiushi Gu

Researchers have actually determined a two-dimensional product that might be utilized to keep quantum info at space temperature level.

Quantum memory is a significant foundation to be attended to in the structure of a quantum web, where quantum info is firmly kept and sent out by means of photons, or particles of light.

“There are defects in this material that can emit single photons, which means it could be used in quantum systems.”– Hannah Stern

Researchers from the Cavendish Laboratory at the University of Cambridge, in partnership with associates from UT Sydney in Australia, have actually determined a two-dimensional product, hexagonal boron nitride, that can release single photons from atomic-scale problems in its structure at space temperature level.

The scientists found that the light given off from these separated problems offers info about a quantum residential or commercial property that can be utilized to keep quantum info, called spin, indicating the product might be helpful for quantum applications. Importantly, the quantum spin can be accessed by means of light and at space temperature level.

The finding might ultimately support scalable quantum networks developed from two-dimensional products that can run at space temperature level. The outcomes are reported in the journal Nature Communications

Future interaction networks will utilize single photons to send out messages all over the world, which will cause more safe international interaction innovations.

Computers and networks developed on the concepts of quantum mechanics would be both even more effective and more safe than present innovations. However, in order to make such networks possible, scientists require to establish trustworthy approaches of creating single, identical photons as providers of info throughout quantum networks.

“We can send information from one place to another using photons, but if we’re going to build real quantum networks, we need to send information, store it and send it somewhere else,” statedDr Hannah Stern from Cambridge’s Cavendish Laboratory, the research study’s co-first author, in addition to Qiushi Gu and Dr JohnJarman “We need materials that can hold onto quantum information for a certain amount of time at room temperature, but most current material platforms we’ve got are challenging to make and only work well at low temperatures.”

Hexagonal boron nitride is a two-dimensional product that is grown by chemical vapor deposition in big reactors. It’s low-cost and scalable. Recent efforts have actually exposed the existence of single photon emitters and the existence of a thick ensemble of optically available spins, however not separately separated spin-photon user interfaces running under ambient conditions.

“Usually, it’s a pretty boring material that’s normally used as an insulator,” stated Stern, who is a Junior Research Fellow at TrinityCollege “But we found that there are defects in this material that can emit single photons, which means it could be used in quantum systems. If we can get it to store quantum information in spin, then it’s a scalable platform.”

Stern and her associates established a hexagon boron nitride sample near a small gold antenna and a magnet of set strength. By shooting a laser at the sample at space temperature level, they had the ability to observe great deals of various magnetic field-dependent reactions on the light being given off from the product.

The scientists discovered that when they shone the laser on the product, they had the ability to control the spin, or fundamental angular momentum, of the problems, and utilize the problems as a method of saving quantum info.

“Typically, the signal is always the same in these systems, but in this case, the signal changes depending on the particular defect we’re studying, and not all defects show a signal, so there is a lot to still discover,” stated co-first author QiushiGu “There’s a lot of variation across the material, like a blanket draped over a moving surface – you see lots of ripples, and they’re all different.”

Professor Mete Atature, who monitored the work, includes “now that we have identified optically accessible isolated spins at room temperature in this material, the next steps will be to understand their photophysics in detail and explore the operation regimes for possible applications including information storage and quantum sensing. There will be a stream of fun physics following this work.”

Reference: “Room-temperature optically detected magnetic resonance of single defects in hexagonal boron nitride” by Hannah L. Stern, Qiushi Gu, John Jarman, Simone Eizagirre Barker, Noah Mendelson, Dipankar Chugh, Sam Schott, Hoe H. Tan, Henning Sirringhaus, Igor Aharonovich and Mete Atat üre, 1 February 2022, Nature Communications
DOI: 10.1038/ s41467-022-28169- z

The research study was supported in part by the European ResearchCouncil Mete Atature is a Fellow of St John’s College, Cambridge.