Connect with us


Quantum communication system can detect earthquakes




Quantum encoded messages sent over cables over long distances are sensitive to small vibrations, indicating a potential byproduct of a secure network in the future.

Technology May 17, 2022

A building destroyed by an earthquake in the Turkish city of Izmir in October 2020

OZAN ​​KOSE / AFP via Getty Images

Quantum communication technology can also measure minute vibrations in the ground, making it useful in detecting earthquakes and landslides.

Quantum Key Distribution (QKD) uses certain properties of photons – particles of light – to encrypt data sent between two devices, making the system more secure than traditional encryption. If an eavesdropper tries to access the encrypted data, the quantum state of the photons changes, which can be detected and the transmission is stopped.

Jian-Wei Pan of the University of Science and Technology in China and colleagues demonstrated a type of QKD called a dual-field QKD, which uses how individual photons interfere with each other to encode data. They succeeded in transmitting encrypted data over a 658 km cable with minimal data loss, one of the longest distances demonstrated by any QKD system.

The encoded information is contained in a quantum characteristic called the phase of a photon, which must be carefully measured along the length of the cable. Any environmental disturbances, such as vibrations in the ground, also affect this phase and can be detected.

“For the first time, we have shown that a dual-field QKD system can distribute quantum keys and sense vibrations over very long distances, which is a novel mechanism to our knowledge,” says Pan.

The data transfer rate must be improved before the technology can be integrated into a large-scale quantum communications network. But if it does in the future, vibration sensing could be a useful byproduct of such a system, says Timothy Spiller of the University of York, UK.

One of the impressive aspects of vibration sensing, he adds, is how accurately it can determine the length of the cable. “They can determine that there are vibrations on the fibers, but then they also use the timing information to determine where that vibration is on the fibers to within about a kilometer of accuracy.”

Journal reference: Physical Review Letters, DOI: 10.1103/ PhysRevLett.128.180502

More on these topics:




The mention sources can contact us to remove/changing this article

What Are The Main Benefits Of Comparing Car Insurance Quotes Online

LOS ANGELES, CA / ACCESSWIRE / June 24, 2020, / Compare-autoinsurance.Org has launched a new blog post that presents the main benefits of comparing multiple car insurance quotes. For more info and free online quotes, please visit https://compare-autoinsurance.Org/the-advantages-of-comparing-prices-with-car-insurance-quotes-online/ The modern society has numerous technological advantages. One important advantage is the speed at which information is sent and received. With the help of the internet, the shopping habits of many persons have drastically changed. The car insurance industry hasn't remained untouched by these changes. On the internet, drivers can compare insurance prices and find out which sellers have the best offers. View photos The advantages of comparing online car insurance quotes are the following: Online quotes can be obtained from anywhere and at any time. Unlike physical insurance agencies, websites don't have a specific schedule and they are available at any time. Drivers that have busy working schedules, can compare quotes from anywhere and at any time, even at midnight. Multiple choices. Almost all insurance providers, no matter if they are well-known brands or just local insurers, have an online presence. Online quotes will allow policyholders the chance to discover multiple insurance companies and check their prices. Drivers are no longer required to get quotes from just a few known insurance companies. Also, local and regional insurers can provide lower insurance rates for the same services. Accurate insurance estimates. Online quotes can only be accurate if the customers provide accurate and real info about their car models and driving history. Lying about past driving incidents can make the price estimates to be lower, but when dealing with an insurance company lying to them is useless. Usually, insurance companies will do research about a potential customer before granting him coverage. Online quotes can be sorted easily. Although drivers are recommended to not choose a policy just based on its price, drivers can easily sort quotes by insurance price. Using brokerage websites will allow drivers to get quotes from multiple insurers, thus making the comparison faster and easier. For additional info, money-saving tips, and free car insurance quotes, visit https://compare-autoinsurance.Org/ Compare-autoinsurance.Org is an online provider of life, home, health, and auto insurance quotes. This website is unique because it does not simply stick to one kind of insurance provider, but brings the clients the best deals from many different online insurance carriers. In this way, clients have access to offers from multiple carriers all in one place: this website. On this site, customers have access to quotes for insurance plans from various agencies, such as local or nationwide agencies, brand names insurance companies, etc. "Online quotes can easily help drivers obtain better car insurance deals. All they have to do is to complete an online form with accurate and real info, then compare prices", said Russell Rabichev, Marketing Director of Internet Marketing Company. CONTACT: Company Name: Internet Marketing CompanyPerson for contact Name: Gurgu CPhone Number: (818) 359-3898Email: [email protected]: https://compare-autoinsurance.Org/ SOURCE: Compare-autoinsurance.Org View source version on accesswire.Com:https://www.Accesswire.Com/595055/What-Are-The-Main-Benefits-Of-Comparing-Car-Insurance-Quotes-Online View photos


to request, modification Contact us at Here or [email protected]