The research team reported the successful controlled transfer of light stored in quantum memory over a distance greater than the size of the carrier.
Captured light when transported to anotherspace is usually lost. However, scientists from the University of Mainz Johannes Gutenberg managed to avoid this by using a special storage device. They used a cloud of ultracold rubidium-87 atoms as a carrier, controlled by the "optical conveyor belt" method.
In fact, physicists turned the light into dark a box of cold atoms, which was moved 1.2 mm without damaging the contents. This storage method was developed in 2018 by a team at the University of Alberta, Canada.
Achievement paves the way for the development of effectivesystems of optical communication and storage of quantum data without loss of information, for example, create repeater blocks or memory devices for light with separate sections for reading.
These technologies are already actively developing and last year the world's first optical transistor with a frequency of 2 THz, operating at room temperature, was created.</p>