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
- Here’s everything you need to know about the dawn of the quantum interneton March 3, 2021 at 4:00 pm
is a global, multi-platform media and entertainment company. Powered by its own proprietary technology, Mashable is the go-to source for tech, digital culture and entertainment content for its ...
- Reconfigurable photonics with on-chip single-photon detectorson March 3, 2021 at 7:53 am
Integrated photonics are promising to scale up quantum optics. Here the authors combine low-power microelectromechanical control and superconducting single-photon detectors on the same chip and ...
- Deterministic multi-qubit entanglement in a quantum networkon February 24, 2021 at 9:12 am
High-fidelity deterministic quantum state transfer and multi-qubit entanglement are demonstrated in a quantum network comprising two superconducting quantum nodes one metre apart, with each node ...
- Researchers produce beams of entangled atomson February 24, 2021 at 8:37 am
Spectacular results have been achieved, for example in the field of quantum teleportation or quantum cryptography. Now, a new method has been developed at TU Wien (Vienna) to produce entangled ...
- Michio Kaku: The Metaphysics of Teleportationon February 23, 2021 at 4:00 pm
How close are we to human teleportation? Successes in quantum teleportation experiments abound. Scientists are using bioelectronic medicine to treat inflammatory diseases, an approach that ...
- Introduction to Quantum Opticson February 23, 2021 at 12:38 pm
Such photon pairs are well suited to the physical realization of Einstein-Rosen-Podolsky type experiments, and also make possible such exciting techniques as quantum cryptography and teleportation.
- Scientists Are Building a Quantum Teleporter Based on Black Holeson February 16, 2021 at 4:37 pm
In that sense, the black holes would recreate a phenomenon called quantum teleportation, which engineers exploit when they build quantum computers. The physics of quantum teleportation gets ...
- Quantum gate teleportation connects atomic qubits in two labson February 15, 2021 at 3:59 pm
“Quantum gate teleportation” – the construction of quantum gates whose output is conditional on the state of an input gate elsewhere – has therefore become an active field of research. Such gates have ...
- Love & Teleportation (2013)on February 13, 2021 at 4:00 pm
Brian Owens was once a prominent professor of quantum mechanics until an accident ... he is trying to build the world's first teleportation machine in his garage at night. All of this while ...
via Bing News