Engineering topics

Moiseev, S. A.

Publications and source records attributed to Moiseev, S. A..

3 records

DOE OSTI2018

Microwave quantum memory on a controlled frequency comb

We consider a protocol of broadband quantum memory on a controlled frequency comb of spectral lines of ring microwave resonators connected to a common strip waveguide. A prototype of this memory is manufactured, on which the room-temperature preservation of microwave pulses with an efficiency of about 3 % is demonstrated. The experimentally obtained efficiency can be enhanced to a level above 90 % using modern microwave technologies and conducting experiments at helium temperatures, which opens a new way for the development of integrated microwave quantum memory. (paper)

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗

DOE OSTI2017

Optimal periodic frequency combs for high-efficiency optical quantum memory based on rare-earth ion crystals

The possibility of enhancing the quantum efficiency of photon echo broadband quantum memory in rare-earth-ion-doped crystals with a frequency comb structure of optical transition inhomogeneous broadening is studied. We have found the optimal parameters of the frequency combs for implementing the pre-assigned quantum efficiency in the chosen spectral range of the optical transitions of rare-earth ions with real parameters. The obtained results allow the conditions to be formulated for increasing the efficiency of broadband quantum memory. The possibilities of experimental implementation of such memory are also discussed. (paper)

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗

DOE OSTI2017

Photon echo of an ultranarrow optical transition of {sup 167}Er{sup 3+} in {sup 7}LiYF{sub 4} crystals

The longitudinal and transverse relaxation times for a transition between hyperfine sublevels of the lower electronic states of the {sup 4}I{sub 15/2} and {sup 4}I{sub 9/2} multiplets of {sup 167}Er{sup 3+} ions in {sup 7}LiYF{sub 4} crystals have been determined for the first time using two-pulse and stimulated photon echo measurements in zero magnetic field at a temperature of 4 K. The decay of the photon echo signal has been shown to be modulated, which is tentatively attributed to the superhyperfine interaction of the {sup 167}Er{sup 3+} ions with their {sup 19}F{sup −} nearest neighbours. The contributions of various types of interaction to the ultranarrow linewidth (∼24 MHz) of the transition in question are discussed. Our results demonstrate that this optical transition of the {sup 167}Er{sup 3+} ion in {sup 7}LiYF{sub 4} crystals is potentially attractive for use in Raman quantum memory schemes. (paper)

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗