QIQT23 | Prof. Animesh Datta - Quantum light spectroscopy of complex quantum systems

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Speaker:Prof. Animesh Datta - University of Warwick

Title:Quantum light spectroscopy of complex quantum systems

Abstract:Quantum light spectroscopy is an emerging field wherein the quantum nature of light is exploited to reveal information about the properties of matter. Although there is evidence that spectroscopy with quantum light may have certain advantages compared to classical spectroscopic methods, this advantage has not been rigorously assessed. We do so by theoretically calculating the precision of estimating parameters of a matter system when probed by a (travelling) pulse of quantum light.

Concretely, we consider the estimation of matter system parameters such as its transition energy and dipole moment of an individual two-level system. To that end, we compare the performances of different quantum states of quantum light, such as single photons and entangled states of light. We also study the experimental attainability of the fundamental quantum limits of spectroscopy.

Our theoretical results should guide the design of quantum light spectroscopy experiments.