A revisit on linear wavepacket interferometry with phase-locked pulse pairs: spatiotemporal dynamics and evolution of information entropy

Abstract Population-detected coherent spectroscopy employing phase-locked pulse pairs, first realized in fluorescence-detected linear wavepacket interferometry (WPI), lies at the heart of coherent action spectroscopy. In this article, we revisit linear WPI, presenting a unified theoretical description and results of numerical simulation for temporal as well as spatiotemporal dynamics of excited-state population in linear WPI, and connecting it with experimental implementations. We further examine the time evolution of differential Shannon entropy for foreseeable practical applications in quantum computation.