Wednesday, 15 March 2017

A femtosecond laser pulse raises computers 100,000 times faster than current ones

A femtosecond laser pulse raises computers 100,000 times faster than current ones

In current computers one of the limitations of their power is marked by the way the signals are transmitted, but what if we could control a laser beam in a way that transmitted pulses of just a few femtoseconds ?

That tiny fraction of time (a second is 10 ^ 15 femtoseconds) has now been controlled by a group of researchers who believe their breakthrough could revolutionize modern computing. It is an important step forward for electronics and optical computing, but also for quantum computing, experts say.

Quantum computing even closer
In their experiment, researchers at the University of Michigan made use of gallium selenide crystals as a semiconductor to then make laser pulses of only a few femtoseconds in duration impact them.

These pulses caused the electrons to pass from one energy level to another, which gave rise to even shorter pulses. These small pulses can be used to read and write information with electrons, and to control that flow of information was enough to change the orientation of the crystals.

The use of these pulses could be used in quantum computing using electrons in excited state like qubits, something that raises the development of computers with work frequencies that would be up to 100,000 times faster than the current ones. For that, of course, there is still much to research and refine, but the work is promising, as they say in Nature Photonics.

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