Modulated Exponential Decay in a Two-Level Quantum System
- 5 December 1969
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 188 (1), 82-90
- https://doi.org/10.1103/physrev.188.82
Abstract
We carry out a Weisskopf-Wigner-type calculation for a system of two quantum levels which are simultaneously coupled by a quantized radiation interaction and a classical external perturbation . The results for the level populations properly reduce to the quantum oscillation solution when and to the exponential-decay solution when . When neither nor is zero, the upper level undergoes a modulated exponential decay. We derive an expression for the perturbed decay rate and discover a new type of modulation factor. The result suggests possibly important modifications to the standard, phenomenological solution of the three-level problem, which is of practical interest.
Keywords
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