The Quantum calls An important step has been taken with the recent investigation by China. Involved researchers say they have achieved Set a new world record for safe and direct quantum communication (QSDCFor its abbreviation in English).

The The communication line will be completely safe and impossible to breakAccording to studies. Allowed Data transmission over a distance of 102.2 kilometers, That is about 84 kilometers more than the last record, which was 18 kilometers.

However, the transmission speed was only 0.54 bits per second, lower than other lines. Although slow, the vision for the future is as follows This quantum communication is widely usedFor its use.

Quantum communication is an evolving technology designed to send Encrypted messages. Based on your safety Their messages combine photons (Light particles) And if someone tries to enter them, they are separated and the message is lost.

Quantum entanglement was predicted as early as 1935 by Einstein, Podolski, and Rose (EPR). Tangled particles have a common ring, so if any of them change properties, the rest are lost. Consequently, only those who participate in the intertwined line can intervene and “see” them.

A team of researchers set a record for this breakthrough, creating a physical system with a new protocol. Although the communication was 102.2 kilometers, it is suggested that it will be longer in the future, and speed improvements are also expected.

Specialists American Association for Advancement Specify that Stress is found in the entanglement of these particlesEssentially connects them over long distances because entanglement is lost as they are transmitted over open-space optical fibers.

One way to solve the problem is to break the transmission line into smaller segments and replace, adjust and Repeat storage of quantum information via optical fibers. Another solution to the problem is the use of lasers and satellite technologies.

If these communications continue fruitfully, we can get started Quantum linesIt is virtually impossible to break, in a short time.

Other advances in quantum communication lines

In March last year, in Spain, € 54 million was allocated to the Ministry of Science and Innovation to support the development and introduction of quantum technologies to enhance the organization’s cybersecurity.

This way they will work Establishment of high security communication infrastructure in Spain, In support European quantum industry And promote the new industrial sector with new companies in the field of digital and cyber security.

While this communication is becoming a more realistic option, its capabilities have been explored for many years. In June 2017, Chinese scientists announced that they had completed a The transmission of tangled photons between suborbital space and Earth.

In this study, the distance between a satellite in orbit and a ground station was 500 to 2,000 kilometers. To make it work, Laser beam on a satellite Subjected to a beam splitter, which resulted in two different polarized states. One of them was used to transmit tangled photons, while the other was used to receive photons to cover distances of more than a thousand kilometers, which is also a record.

(According to EP and EFE)

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