There are no complicated codes for a ray of light

    A breakthrough in the use of light in cryptography was made by researchers from the University of Michigan. A new decryption method allows you to crack complex codes in literally a few seconds. The method developed by scientists is based on the interaction of short pulses of a coherent light flux with quantum dots. The whole salt of the discovery is to use such a property of light, according to which it forms a complex system at a certain frequency and phases, something like a kind of “optical network”, which allows you to read information as you move from one quantum dot to another.

    The device invented by North American scientists allows you to encrypt a ray of light according to your query (using something like factoring a number or searching for a numerical sequence). It is almost impossible to understand all this without special education, but the researchers took the trouble to provide the public with a “simple” version. So, a ray of light is directed sequentially from one quantum dot to another, where there is a calculation of all possible options and combinations of answers for a given question. The results are read instantly (and the transition by points too), which allows you to get answers in a matter of seconds, while solving such a task would take more than a dozen years, even if you use the most powerful computers that currently exist.

    The developed method is not only unique, but also relatively cheap. The fact is that researchers used inexpensive diodes as a light source. And, since for one bit of quantum information (qubit), only one photon is needed (the energy spent on this is only 18 J), for operation at a frequency of 1 GHz the device will need only one billionth of a watt. So far, the operating frequency in the laboratory is 1.4 GHz, but scientists suggest that the device could theoretically work at a frequency of up to 100 GHz.

    via TgDaily

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