A group of researchers at Princeton University invented a laser similar to the size of a single grain.  The scientists have powered the laser with an electron known as quantum dots.

The new tiny laser requires merely one billionth of electricity.  Such quantity of electricity is equal to the electricity consumption of a hair dryer. The laser can effortlessly release energy in the microwave range. The device is an incredible demonstration of the interface of light and electrons. Jason Petta, an associate professor of physics states that it is one of the smallest single electron devices.

The main objective of the project was to carry out an experiment on the usage of quantum dots with quantum bits. The researchers intended to double the quantum dots with the help of photon entanglement. However, the scientists formed a little maser during the project

They positioned two double dots of around 6 mm separately. They placed these dots in a kind of super conductivity material. Afterwards, they decreased the temperature of the niobium. Once the device was on, the electron began to flow through double quantum dot.

It can be considered as a key step towards the creation of quantum computing system from semiconductor materials. The outcome of the project is extremely significant for the addition of quantum bits in semiconductor devices.

The report is published in the Journal science.