The digital revolution has reached its zenith and the stage is set for the development of Quantum Computers. Researchers have perfected a method to observe and control the spin state of a single electron with the help of Lasers.
A research team headed by University of Chicago scientists has found a way to record and manipulate the behavior of a single electron at the quantum mechanical level. The researchers used laser light in ultrafast pulses to manage the quantum state of electrons which is present inside nanoscale defects which are located in a diamond. At the center of the research is a quantum spin system also known as a nitrogen-vacancy center, an atomic-scale defect found in naturally occurring in diamonds.
Research head David Awschalom, a molecular engineering professor at Chicago said, “These defects have garnered great interest over the past decade, providing a test-bed system for developing semiconductor quantum bits as well as nanoscale sensors. Here, we were able to harness light to completely control the quantum state of this defect at extremely high speeds.”
The process envisages illuminating a single such Nitrogen Vacancy center with two pulses of light from a laser. Quantum state of the electron bound within the defect is switched on when it is excited by the first pulse and then switched off or stopped by the second pulse. The time period between the first pulse and the second pulse is important since the way electron interacts with local surroundings is determined by the timescale.
Using different timescale to test the electron’s reaction to a wide array of pulse timescale could lead to a demonstration of the quantum dynamics of an NV center, which is much better than which has been ever been obtained before.
Testing the electron’s reaction to a wide number of different pulse timescale can yield a demonstration of the quantum dynamics of an NV center that is much better than has ever been obtained before, the researchers said.
The findings have immense use in the future development of Quantum Computing. However the scientists have to move beyond just observing the quantum state controlling materials at the atomic level.