SUPPRESSION OF THE FIELD SHIFT OF RAMSEY RESONANCE ON FORBIDDEN TRANSITIONS OF ATOMS AND IONS

We perform a theoretical analysis of the Ramsey scheme with pulses of different duration and with a phase step in the second pulse with account for the finite width of laser line. We define optimum features of pulses that correspond to maximum suppression of the field shift and maximum amplitude of resonance for both schemes. Ramsey scheme with a phase step in the second pulse provides effective suppression of the field shift and it is less sensitive to the Rabi frequency fluctuations in comparison with Ramsey scheme with pulses of different duration. First experiments on ytterbium single-ion optical clock (Germany, PTB) confirm theoretical predictions.

Keywords:
optical frequency standards, cold atoms and ions, field shift, Ramsey resonance.
УДК 535.14

SUPPRESSION OF THE FIELD SHIFT OF RAMSEY RESONANCE ON FORBIDDEN TRANSITIONS OF ATOMS AND IONS