Stability of relaxation processes in a quantum system as a main factor for achieving the high long-term frequency stability of a standard

Abstract

The processes of synchronous Zeeman's relaxation are investigated with simultaneous observing population difference, M z (τ 1 ) — and coherence, M x (τ 2 ), — components within a spin of system of 87Rb atoms in cells with antirelaxation coating, when changing cell volume, operating temperature and pumping light intensity with D 1 — line. The existence of total relaxation ‘degeneracy’ is experimentally determined which is characterized through (t 1 ≈ t 2 ) — condition being necessary [1] for achieving a high long-term frequency stability of standards (in particular, quantum magnetometers). The procedure for investigating relaxation processes developed by the author could be useful for the realization of atomic frequency standards with a high long-term frequency stability.