Saturday, 29 August 2015

A Little Light Interaction Leaves Quantum Physicists Beaming


Light
A remarkable research conducted by a group of physicists had brought insightful revelations where it is possible to make building block of the quantum computer with the use of pure light. This team of physicists comes from University of Toronto and they had successfully published their paper in the Nature Physics on ‘logic gateway’ an essential segment of computer circuitry.

What are logic gate? 

Logic gates segments are designed to execute operations on the input data in order to create outputs. In the earlier times during the phase of classical computers, the diodes or transistors formed the logic gates but with the advancement of quantum computer component it is now comprised of both the individual atoms as well as subatomic particles. Processing of information as per the laws of the quantum physics usually takes place when these particles interact with each other.

In the quantum computing the light particles are known as ‘photos’ and offers various advantages but it is extremely difficult to invoke interaction among them in a profitable manner. The research conducted by the physicist from University of Toronto is centered on finding successful ways of creating such interactions.

Researchers are upbeat with their experiment results

One of the paper’s authors Aephraim Steinberg had shed some amazing insight on the experiment results. Physicists at the University Of Toronto had studied the effect of photon on an optical beam but they had advanced their experiment in a wholesome fashion. In usual conditions, light beam passes through each other without causing change on effect on the other. In order to effectively develop technologies such as optical quantum computers it is necessary to make beams interact with one another. But no one had achieved feat with using just single photon.

How this experiment was conducted? 

The researchers had conducted this experiment of creating light beams interaction in a delicate process of two steps. A shot of single photon was forced at the rubidium atoms so that it iced to a millionth of a degree above absolute zero. Later on the photons become intertwined with the atoms and this resulted in rubidium interaction to another optical beam. The photon started changing the atom’s refractive index which brought a minute but calculable “phase shift” in the beam. This method used in the experiment can be actively brought into use in the optical quantum logic gate, which will facilitate input-output and information-processing.

Where this experiment can be applied? 

The best place to use this experiment in wholesome application is in the quantum logic gates. This advanced process will help in seeing the interactions in a new manner and in the study of optics a new filed will be revealed. Currently the researchers are working further to answer two important questions i.e. what happens when dealing with one particle of light at time and how differently the light beams will interact with other. Researchers are hopeful of finding these essential questions answers soon with continuous research and experimentations.