Close Menu
    Facebook X (Twitter) Instagram Pinterest YouTube LinkedIn TikTok
    TopBuzzMagazine.com
    Facebook X (Twitter) Instagram Pinterest YouTube LinkedIn TikTok
    • Home
    • Movies
    • Television
    • Music
    • Fashion
    • Books
    • Science
    • Technology
    • Cover Story
    • Contact
      • About
      • Amazon Disclaimer
      • Terms and Conditions
      • Privacy Policy
      • DMCA / Copyrights Disclaimer
    TopBuzzMagazine.com
    Home»Science»Unforgeable quantum money can be stored in an ultracold ‘debit card’
    Science

    Unforgeable quantum money can be stored in an ultracold ‘debit card’

    By AdminSeptember 20, 2025
    Facebook Twitter Pinterest LinkedIn Tumblr Email
    Unforgeable quantum money can be stored in an ultracold ‘debit card’


    Unforgeable quantum money can be stored in an ultracold ‘debit card’

    A quantum version of a debit card could keep your money safe

    Globalimages101/Alamy

    A rudimentary quantum debit card that can be loaded with unforgeable quantum money has been made from extremely cold atoms and particles of light.

    In ordinary banks, discovering a forged banknote often depends on the skill of the forger, but in a quantum bank a law of physics called the no-cloning theorem would make a successful forgery impossible. This law states identical copies of quantum information simply cannot be made and, in 1983, physicist Stephen Wiesner devised a protocol that leverages the no-cloning theorem to create unforgeable currency. Julien Laurat at the Kastler Brossel Laboratory in France and his colleagues have now implemented the idea in the most advanced experiment yet.

    In this protocol, a bank issues banknotes made of quantum particles that have a special set of properties – a specific quantum state – and are protected from forgery by the non-cloning theorem. Laurat says the protocol itself is a seminal work in quantum cryptography, but it had never been implemented in such a way that the user could store quantum money – the fragility of quantum states means that a user would have to immediately spend it.

    His team has made such storage possible by integrating memory devices similar to hard drives into their setup. In their experiment, the user communicates with a quantum device playing the role of the bank by exchanging particles of light, or photons. The state of each photon can be deposited into the memory, analogous to loading up a debit card.

    The team’s memory device was made from several hundred million caesium atoms which the researchers cooled to only a few millionths of a degree above absolute zero by hitting them with lasers. At this extreme temperature, the atoms’ quantum states could be controlled very precisely with light, but Laurat says that it took years to determine how to do well enough for the cold-atomic memory to work as a part of a quantum debit card. Through repeated tests, he and his colleagues showed photons can be efficiently retrieved from the atoms when the user wants to spend their quantum money without those states being corrupted in the process.

    Christoph Simon at the University of Calgary in Canada says the new experiment is a step in the direction of full-fledged quantum money but the storage time of the quantum memory, which is roughly 6 millionths of a seconds, is still too short for the protocol to be practical. “Another [future step] is to increase portability. I think the long-term goal, especially in the quantum money context, would be a quantum memory that you can put in your pocket. But we are definitely not there yet,” he says.

    The team has their sights on increasing this storage time – if it were a thousand times longer, the protocol could be used within metropolitan quantum networks that already exist in cities across the world, says Laurat. Additionally, state-of-the-art quantum memories could enable ultra secure long-distance quantum communication as well as help connect several quantum computers into one, more powerful device, he says.

    Topics:

    • quantum computing/
    • cryptography

    View Original Source Here

    Share. Facebook Twitter Pinterest LinkedIn Tumblr Email

    Related Posts

    Bering Land Bridge emerged much later than we thought it did, new study finds

    October 1, 2025

    We finally know why a belly button becomes an ‘innie’

    October 1, 2025

    Plant receptors for nitrogen-fixing bacteria evolved independently at least three times, study reveals

    September 30, 2025

    Ancient Egyptian statue of ‘Messi’ found at Saqqara necropolis is ‘only known example of its kind from the Old Kingdom’

    September 30, 2025

    Our brain ‘swivels’ to focus on sounds from different directions

    September 29, 2025

    Typhoon Bualoi batters Vietnam coast, killing 11

    September 29, 2025
    popular posts

    Second Life Podcast: Denise Woodard

    New Mystery & Thriller Novels for Fans of Tana French

    How Many Books Do You Pack for 6 Weeks Away?

    Understanding the many different ways animals are evolving in response

    Anya Taylor-Joy Traveled in the Trendy Top I’d Wear Anywhere *But* an Airport

    “My biggest fear”: Chris Hemsworth reveals genetic predisposition for Alzheimer’s

    Arrowverse EP Marc Guggenheim Reacts to Not Getting Call From

    Categories
    • Books (3,444)
    • Cover Story (8)
    • Events (19)
    • Fashion (2,545)
    • Interviews (45)
    • Movies (2,744)
    • Music (3,028)
    • News (161)
    • Politics (6)
    • Science (4,594)
    • Technology (2,739)
    • Television (3,469)
    • Uncategorized (932)
    Archives
    Facebook X (Twitter) Instagram Pinterest YouTube Reddit TikTok
    © 2025 Top Buzz Magazine. All rights reserved. All articles, images, product names, logos, and brands are property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, logos, and brands does not imply endorsement unless specified. By using this site, you agree to the Terms of Use and Privacy Policy.

    Type above and press Enter to search. Press Esc to cancel.

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
    Do not sell my personal information.
    Cookie SettingsAccept
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
    CookieDurationDescription
    cookielawinfo-checkbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
    cookielawinfo-checkbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
    cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
    cookielawinfo-checkbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
    cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
    viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
    Functional
    Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
    Performance
    Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
    Analytics
    Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
    Advertisement
    Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
    Others
    Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
    SAVE & ACCEPT