Solid-State Quantum Memory for Single-Photon Optical Signals Created at the Institute of Applied Physics of the Russian Academy of Sciences

The development will form the basis for "blind" photon transceivers for reliable information transfer

At the Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), solid-state quantum memory for single-photon optical signals with a working wavelength of 867 nanometers and a photon storage time of up to 60 nanoseconds has been developed for the first time in Russia. This was reported by the press service of the institute.

Image source сгенерировано нейросетью grok

Scientists are now working on creating "blind" photon transceivers (repeaters) that will ensure reliable information transfer not only between large corporations and the military, but also between ordinary people. A key element of such repeaters is quantum memory. Various media can be used to create it, including single atoms and ensembles of "hot" and "cold" atoms.

Our memory is well integrated into one of the transparency windows of optical fiber, we have selected very good ratios of efficiency and noise. Now our storage times are measured in microseconds, but in order to organize transmission over distances of the order of thousands of kilometers, it is necessary to reach times of tenths of a second.

Rinat Akhmedzhanov, Doctor of Physical and Mathematical Sciences, Head of the Department of Nonlinear Electrodynamics of IAP RAS

Specialists of IAP RAS have chosen more practical solid-state devices that can be implemented in crystals doped with rare-earth metal ions. These devices have excellent coherent properties at cryogenic temperatures. During the experiment, the working wavelength was 867 nanometers, and the photon storage time was up to 60 nanoseconds.

According to Akhmedzhanov, the IAP RAS team was the first in Russia to conduct such experiments.

Earlier www1.ru reported that a method for data transmission between superconducting qubits has been developed.