Abstract
The precession of an electric dipole moment in an external electric field can be reversed by reversing the field direction. This time-reversal operation allows study of coherence in the time evolution of Rydberg Stark wave packets by measuring the resulting echoes. Different sources of reversible dephasing and irreversible dephasing, i.e., decoherence, are discussed in detail. Stochastic interactions with the environment are simulated in a controlled manner by using artificially synthesized noise. The rate of irreversible dephasing is determined from the reduction of the echo amplitude under multiple field reversals.
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