Sep 112017
 

Schematic of a quantum network: single photons transmit quantum information between the network nodes, where they are stored in an atomic gas. (Illustration: University of Basel, Department of Physics)

Physicists from the University of Basel have developed a memory that can store photons. These quantum particles travel at the speed of light and are thus suitable for high-speed data transfer. The researchers were able to store them in an atomic vapor and read them out again later without altering their quantum mechanical properties too much. This memory technology is simple and fast and it could find application in a future quantum Internet.

The journal Physical Review Letters has published the results.

Even today, fast data transfer in telecommunication networks employs short light pulses. Ultra broadband technology uses optical fiber links through which information can be transferred at the speed of light. At the receiver’s end, the transmitted information has to be stored quickly and without errors so that it can be processed further electronically on computers. To avoid transmission errors, each bit of information is encoded in relatively strong light pulses that each contain at least several hundreds of photons.

For several years, researchers all over the world have been working on operating such networks with single photons. Encoding one bit per photon is not only very efficient, but it also allows for a radically new form of information processing based on the laws of quantum physics. These laws allow a single photon to encode not only the states 0 or 1 of a classic bit, but also to encode a superposition of both states at the same time. Such quantum bits are the basis for quantum information processing that could make unconditionally secure communication and super fast quantum computers possible in the future. The ability to store and retrieve single photons from a quantum memory is a key element for these technologies, which is intensively investigated.

Simple and fast

A team of physicists led by the professors Philipp Treutlein and Richard Warburton from the University of Basel has now developed a particularly simple and fast quantum memory that stores photons in a gas of rubidium atoms. A laser controls the storage and retrieval processes. The technology used does not require cooling devices or complicated vacuum equipment and can be implemented in a highly compact setup. The researchers were also able to verify that the memory has a very low noise level and is suitable for single photons.

One step closer to the quantum internet

“The combination of a simple setup, high bandwidth and low noise level is very promising for future application in quantum networks,” says Janik Wolters, first author of the study. The development of such quantum networks is one of the goals of the National Center of Competence in Quantum Science and Technology (NCCR QSIT) and of the EU Framework Programme for Research and Innovation that have funded this study. In the future, quantum networks could lead to unconditionally secure communication, the networking of different quantum computers and the simulation of complex physical, chemical and biological systems.

The Latest on: Quantum internet
  • Quantum Cryptography Market: Forecast to Reach $943 Million by 2022 - Research and Markets
    on November 20, 2017 at 10:13 am

    With the increasing need of wireless communication and remote access security, quantum cryptography application provides protection on the usability and integrity of the network and data. The ongoing enhancements in the internet technology is continuously ... […]

  • Why I Switched From Chrome to Firefox Quantum
    on November 20, 2017 at 6:12 am

    I’ve been using Firefox Quantum non-stop for more than a week now ... At the time, it was a breath of fresh air compared to Internet Explorer. But Chrome stole the crown from Firefox with a more modern architecture that was faster, more secure, and ... […]

  • What Happens When Quantum Computing and AI Merge?
    on November 18, 2017 at 11:01 am

    This technology is supremely important to government militaries. China, in particular, is hard at work to build a space-based hack-proof internet using quantum satellites. "Right now all of security on the internet is based on public key encryption and it ... […]

  • Firefox Quantum vs. Chrome: Which Is Faster?
    on November 18, 2017 at 5:00 am

    Accompanying every new web browser version release is a flood of claims that it’s faster than anything else on the internet. And why not ... So with this week's drop of Firefox Quantum, the latest incarnation of Mozilla's stalwart browser, the ... […]

  • 15 Things Everyone Should Know About Quantum Computing
    on November 15, 2017 at 9:30 pm

    Even though a true quantum computer is still not a reality, it’s clear that the race is on. Also, you might like to know that my brand new book ‘Data Strategy: How to Profit from a World of Big Data, Analytics and the Internet of Things‘ is out now. […]

  • Yale Professors Race Google and IBM to the First Quantum Computer
    on November 15, 2017 at 1:32 pm

    Quantum computing systems are difficult to understand because ... who helped oversee the creation of Google’s vast internet infrastructure and is now investing in Mr. Schoelkopf’s company as a partner at Sequoia. “I have yet to see large teams ... […]

  • Firefox Quantum – A browser with 2X Speed and Photon UI
    on November 15, 2017 at 4:42 am

    Mozilla Firefox, one of the best desktop browser and a real alternative to Microsoft Internet Explorer ... termed as Firefox Quantum which is 2X fast compared to old Firefox version. Not just speed improvement but Firefox Quantum also got the new sleek ... […]

  • Is Mozilla's Firefox Quantum Browser Better Than Google Chrome?
    on November 15, 2017 at 2:36 am

    While Google may be weary of this renewed competition to Chrome, the technology giant benefits from Firefox Quantum as its search engine replaces Yahoo as the default search engine for the browser. Firefox currently lags behind Chrome, Safari and Internet ... […]

  • Firefox Quantum Just Might Transform Your Internet Experience
    on November 15, 2017 at 12:00 am

    After 2 months of beta-testing, Mozilla is releasing Firefox Quantum, a new ultra-fast browser designed to compete with Google Chrome. According to Mozilla, the browser is backed by new, powerful engine, meaning it can handle as many tabs as you want to open. […]

  • Entanglement of Separate Nanomechanical Devices Heralds Quantum Internet
    on November 14, 2017 at 10:09 pm

    Creating a deep quantum link between nanofabricated resonators on silicon chips is a step toward spy-proof communication, physicists say. The strange laws of quantum mechanics make it possible to send information from one part of the universe to another ... […]

via Google News and Bing News

Other Interesting Posts

Leave a Reply

%d bloggers like this: