Researchers from the Yokohama National University have teleported quantum information securely within the confines of a diamond. The study has big implications for quantum information technology – the future of how sensitive information is shared and stored.
The researchers published their results on June 28, 2019 in Communications Physics.
“Quantum teleportation permits the transfer of quantum information into an otherwise inaccessible space,” said Hideo Kosaka, a professor of engineering at Yokohama National University and an author on the study. “It also permits the transfer of information into a quantum memory without revealing or destroying the stored quantum information.”
The inaccessible space, in this case, consisted of carbon atoms in diamond. Made of linked, yet individually contained, carbon atoms, a diamond holds the perfect ingredients for quantum teleportation.
A carbon atom holds six protons and six neutrons in its nucleus, surrounded by six spinning electrons. As the atoms bond into a diamond, they form a notoriously strong lattice. Diamonds can have complex defects, though, when a nitrogen atom exists in one of two adjacent vacancies where carbon atoms should be. This defect is called a nitrogen-vacancy center.
Surrounded by carbon atoms, the nucleus structure of the nitrogen atom creates what Kosaka calls a nanomagnet.
To manipulate an electron and a carbon isotope in the vacancy, Kosaka and the team attached a wire about a quarter the width of a human hair to the surface of a diamond. They applied a microwave and a radio wave to the wire to build an oscillating magnetic field around the diamond. They shaped the microwave to create the optimal, controlled conditions for the transfer of quantum information within the diamond.
Kosaka then used the nitrogen nanomagnet to anchor an electron. Using the microwave and radio waves, Kosaka forced the electron spin to entangle with a carbon nuclear spin – the angular momentum of the electron and the nucleus of a carbon atom. The electron spin breaks down under a magnetic field created by the nanomagnet, allowing it to become susceptible to entanglement. Once the two pieces are entangled, meaning their physical characteristics are so intertwined they cannot be described individually, a photon which holds quantum information is applied and the electron absorbs the photon. The absorption allows the polarization state of the photon to be transferred into the carbon, which is mediated by the entangled electron, demonstrating a teleportation of information at the quantum level.
“The success of the photon storage in the other node establishes the entanglement between two adjacent nodes,” Kosaka said. Called quantum repeaters, the process can take individual chunks of information from node to node, across the quantum field.
“Our ultimate goal is to realize scalable quantum repeaters for long-haul quantum communications and distributed quantum computers for large-scale quantum computation and metrology,” Kosaka said.
The Latest on: Quantum teleportation
via Google News
The Latest on: Quantum teleportation
- Quantum Computing for Everyoneon March 13, 2020 at 2:40 am
along the likes of ‘quantum entanglement’ and ‘quantum teleportation’. But what really is it? Quantum computing is very, very linear-algebra heavy — and hence, there’s not a lot of ...
- Website access codeon March 12, 2020 at 11:25 pm
- Navigating the Wacky World of Quantum Entrepreneurshipon March 12, 2020 at 3:48 pm
You gotta admit, quantum teleportation sounds WAY cooler than normal teleportation. That’s why I decided to try understanding the mechanics of “quantum”, and why it’s important for us.
- Quantum teleportation is real, but it's not what you thinkon March 5, 2020 at 4:00 pm
“Could Star Trek transporters be far behind? Sorry for the buzzkill, but this real-world trick, called quantum teleportation, probably won’t ever send your body from one place to anothe ...
- Physicists link quantum memories across the longest distance everon March 5, 2020 at 4:02 am
also called quantum teleportation. "Quantum teleportation is a way to transfer an unknown quantum state from one particle to another at a distant location, without sending the original particle ...
- Scientists Are Building a Quantum Teleporter Based on Black Holeson March 2, 2020 at 1:54 pm
And all it’ll take are… two quantum entangled black holes. In that sense, the black holes would recreate a phenomenon called quantum teleportation, which engineers exploit when they build quantum ...
- Long March 2D launches world’s first quantum communications satelliteon March 1, 2020 at 4:00 pm
Finally, the QSS plans to achieve Quantum Teleportation from ground to satellite as a totally new way of communication, quantum teleportation is the fundamental process of quantum networks and ...
- Quantum secrets can be teleported and shared between multiple senders and receiverson February 27, 2020 at 1:02 am
Decentralised quantum teleportation of a shared quantum secret. Courtesy: Seung-Woo Lee, Korea Institute for Advanced Study A novel “decentralized” protocol makes it possible to share secret ...
- Author Correction: Chip-to-chip quantum teleportation and multi-photon entanglement in siliconon February 24, 2020 at 9:40 am
In the version of this Letter originally published, the following sentence was missing from the Acknowledgements: “D.L., I.I.F., J.G.R. and M.G.T. acknowledge ...
- How Quantum Computing Will Change Video Gameson February 6, 2020 at 8:10 pm
The pixel art teleportation animations I mentioned earlier are based on the same basic idea. Here's some examples of quantum interference effects and a quantum perturbation of Super Mario Bros.
via Bing News