A Photon Has Been Sent To Space Using Quantum Teleportation | IFLScience

http://www.iflscience.com/physics/a-photon-has-been-sent-to-space-using-quantum-teleportation/

Last month, Chinese researchers showed that quantum communication between Earth and space is possible, and now they have used the tech to send a photon to space using quantum teleportation.
As this research shows, to create a truly global network for quantum communication, we will need quantum satellites.

10 Comments

  1. Tomi Engdahl says:

    First Object Teleported from Earth to Orbit
    https://www.technologyreview.com/s/608252/first-object-teleported-from-earth-to-orbit/

    Researchers in China have teleported a photon from the ground to a satellite orbiting more than 500 kilometers above.

    The rocket placed Micius in a Sun-synchronous orbit so that it passes over the same point on Earth at the same time each day.

    Micius is a highly sensitive photon receiver that can detect the quantum states of single photons fired from the ground. That’s important because it should allow scientists to test the technological building blocks for various quantum feats such as entanglement, cryptography, and teleportation.

    Today, the Micius team announced the results of its first experiments. The team created the first satellite-to-ground quantum network, in the process smashing the record for the longest distance over which entanglement has been measured. And they’ve used this quantum network to teleport the first object from the ground to orbit.

    Teleportation has become a standard operation in quantum optics labs around the world. The technique relies on the strange phenomenon of entanglement.

    Reply
  2. Tomi Engdahl says:

    Quantum Cryptography System Breaks Daylight Distance Record
    http://spectrum.ieee.org/tech-talk/aerospace/satellites/quantum-cryptography-in-daylight-across-53-kilometers

    Satellites can now set up quantum communications links through the air during the day instead of just at night, potentially helping a nigh-unhackable space-based quantum Internet to operate 24-7, a new study from Chinese scientists finds.

    Previously, “the maximum range for day-time free-space quantum communication was 10 kilometers,”

    Now researchers led by quantum physicist Jian-Wei Pan at the University of Science and Technology of China at Hefei have successfully established 53-kilometer quantum cryptography links during the day between two ground stations. This research suggests that such links could work between a satellite and either a ground station or another satellite, they say.

    To overcome interference from sunlight, the researchers switched from the roughly 700-to-900-nanometer wavelengths of light used in all prior day-time free-space experiments to roughly 1,550 nm. The sun is about one-fifth as bright at 1,550 nanometers as it is at 800 nanometers, and 1,550-nanometer light can also pass through Earth’s atmosphere with virtually no interference. Moreover, this wavelength is also currently widely used in telecommunications

    Now researchers led by quantum physicist Jian-Wei Pan at the University of Science and Technology of China at Hefei have successfully established 53-kilometer quantum cryptography links during the day between two ground stations. This research suggests that such links could work between a satellite and either a ground station or another satellite, they say.

    To overcome interference from sunlight, the researchers switched from the roughly 700-to-900-nanometer wavelengths of light used in all prior day-time free-space experiments to roughly 1,550 nm. The sun is about one-fifth as bright at 1,550 nanometers as it is at 800 nanometers, and 1,550-nanometer light can also pass through Earth’s atmosphere with virtually no interference. Moreover, this wavelength is also currently widely used in telecommunications, making it more compatible with existing networks.

    Reply
  3. Tomi Engdahl says:

    Quantum physicists have teleported ‘qutrits’ for the first time
    A new study improves on a technique previously performed only with quantum bits, or qubits
    https://www.sciencenews.org/article/quantum-physicists-teleported-qutrits-first-time

    Reply
  4. Tomi Engdahl says:

    Entanglement sent over 50 km of optical fiber
    https://m.phys.org/news/2019-08-entanglement-km-optical-fiber.html

    The quantum internet promises absolutely tap-proof communication and powerful distributed sensor networks for new science and technology. However, because quantum information cannot be copied, it is not possible to send this information over a classical network. Quantum information must be transmitted by quantum particles, and special interfaces are required for this. The Innsbruck-based experimental physicist Ben Lanyon, who was awarded the Austrian START Prize in 2015 for his research, is investigating these important intersections of a future quantum Internet.

    Reply
  5. Tomi Engdahl says:

    “Quantum teleportation between two computer chips for the first time. The team managed to send information from one chip to another instantly without them being physically or electronically connected, in a feat that opens the door for quantum computers and quantum internet. This kind of teleportation is made possible by a phenomenon called quantum entanglement, where two particles become so entwined with each other that they can “communicate” over long distances. Changing the properties of one particle will cause the other to instantly change too, no matter how much space separates the two of them.”

    Information teleported between two computer chips for the first time
    https://newatlas.com/quantum-computing/quantum-teleportation-computer-chips/

    Scientists at the University of Bristol and the Technical University of Denmark have achieved quantum teleportation between two computer chips for the first time. The team managed to send information from one chip to another instantly without them being physically or electronically connected, in a feat that opens the door for quantum computers and quantum internet.

    Reply
  6. Tomi Engdahl says:

    NASA’s Plan to Turn the ISS Into a Quantum Laser Lab
    https://www.wired.com/story/nasas-plan-to-turn-the-iss-into-a-quantum-laser-lab/

    A national quantum internet would enable ultra-secure data transmission. But first, we’re going to need some space lasers.

    LATER THIS SUMMER, physicists at the Argonne and Fermi national laboratories will exchange quantum information across 30 miles of optical fiber running beneath the suburbs of Chicago. One lab will generate a pair of entangled photons—particles that have identical states and are linked in such a way that what happens to one happens to the other—and send them to their colleagues at the other lab, who will extract the quantum information carried by these particles of light. By establishing this two-way link, the labs will become the first nodes in what the researchers hope will one day be a quantum internet linking quantum computers around the nation.

    Reply

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