Scientists have managed to send a record-breaking amount of data in quantum form, using a strange unit of quantum information called a qutrit.
The news: Quantum tech promises to allow data to be sent securely over long distances. Scientists have already shown it’s possible to transmit information both on land and via satellites using quantum bits, or qubits. Now physicists at the University of Science and Technology of China and the University of Vienna in Austria have found a way to ship even more data using something called quantum trits, or qutrits.
Qutrits? Oh, come on, you’ve just made that up: Nope, they’re real. Conventional bits used to encode everything from financial records to YouTube videos are streams of electrical or photonic pulses than can represent either a 1 or a 0. Qubits, which are typically electrons or photons, can carry more information because they can be polarized in two directions at once, so they can represent both a 1 and a 0 at the same time. Qutrits, which can be polarized in three different dimensions simultaneously, can carry even more information. In theory, this can then be transmitted using quantum teleportation.
Quantum … what? Quantum teleportation is a method for shipping data that relies on an almost-mystical phenomenon called entanglement. Entangled quantum particles can influence one another’s state, even if they are continents apart. In teleportation, a sender and receiver each receive one of a pair of entangled qubits. The sender measures the interaction of their qubit with another one that holds data they want to send. By applying the results of this measurement to the other entangled qubit, the receiver can work out what information has been transmitted. (For a more detailed look at quantum teleportation, see our explainer here.)
Measuring progress: Getting this to work with qubits isn’t easy—and harnessing qutrits is even harder because of that extra dimension. But the researchers, who include Jian-Wei Pan, a Chinese pioneer of quantum communication, say they have cracked the problem by tweaking the first part of the teleportation process so that senders have more measurement information to pass on to receivers. This will make it easier for the latter to work out what data has been teleported over. The research was published in the journal Physical Review Letters.
Deterring hackers: This might seem rather esoteric, but it has huge implications for cybersecurity. Hackers can snoop on conventional bits flowing across the internet without leaving a trace. But interfering with quantum units of information causes them to lose their delicate quantum state, leaving a telltale sign of hacking. If qutrits can be harnessed at scale, they could form the backbone of an ultra-secure quantum internet that could be used to send highly sensitive government and commercial data.
The Latest on: Quantum internet
via Google News
The Latest on: Quantum internet
- 17 online computer science classes from MIT you can enroll in for freeon June 22, 2020 at 1:44 pm
MIT is one of the founding members of edX, a popular online learning site. You can enroll in 17 computer science courses for free.
- Crash Bandicoot 4: It's About Time images and release date hit the interneton June 20, 2020 at 6:09 am
The Crash leaks continue: this time it's images and a release date. After this week's leak of the game title, platforms and game description via the Taiwan Digital Game Rating Committee, Crash ...
- Universal Quantum Raises £3.6M in Seed-Funding Roundon June 18, 2020 at 8:17 am
The UK Government’s Science Minister, Amanda Solloway MP, will announce the investment at a quantum technology industry event later today. Universal Quantum’s prestigious list of investors includes ...
- Restructuring cybersecurity with the power of quantumon June 17, 2020 at 11:52 pm
While quantum computing is still in its relative stages of infancy, it’s rapid evolution means it will soon overtake technologies we’ve previously relied on, including high performance cloud computing ...
- Major scientific breakthrough in quantum cryptographic communicationon June 17, 2020 at 3:00 am
One reviewer at Nature hailed the work as a "groundbreaking experiment, which takes a significant step towards establishing a global QKD network, and more generally, a quantum internet for quantum ...
- China’s quantum satellite enables first totally secure long-range messageson June 16, 2020 at 2:32 am
The satellite serves as the source of pairs of entangled photons, twinned light particles whose properties remain intertwined no matter how far apart they are. If you manipulate one of the photons, ...
- Scientists set milestone in quantum techon June 15, 2020 at 6:20 pm
Chinese scientists have achieved the world's first quantum key distribution over 1,120 kilometers without relying on any intermediate security relays, according to a study published in the journal ...
- Encryption Distance Record Broken By Quantum Satelliteon June 15, 2020 at 9:02 am
Encryption is a crucial part of technology, protecting individuals' privacy and finances online. Quantum computing, the next leap forward for the field, ne ...
- China's quantum satellite helps send secure messages over 1200kmon June 15, 2020 at 8:19 am
Quantum communication using entangled particles is essentially unhackable, and now it has been extended to the longest distance ever, about 1200 kilometres ...
- Increased security in quantum communication achieved by Chinese, Oxford scientistson June 15, 2020 at 8:00 am
This new research could help accelerate China’s efforts to develop hacking-resistant communications networks, while burnishing the country’s credentials as a quantum technology powerhouse.
via Bing News