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Quantum Mollow Quadruplet in Nonlinear Cavity QED
Thomas Allcock1, Wolfgang Langbein1, Egor A Muljarov1
1School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, United Kingdom.
Physical Review Letters
|April 8, 2022
Summary
We present an analytical method for the optical response of a two-level system in a microcavity. This reveals a quantum Mollow quadruplet (QMQ) and provides an approximation for high-field conditions.
Area of Science:
- Quantum optics
- Cavity quantum electrodynamics
Background:
- Understanding the optical response of quantum systems is crucial.
- Nonlinear optical phenomena arise from strong light-matter interactions.
Purpose of the Study:
- To develop an exact analytical approach for the optical response of a two-level system coupled to a microcavity.
- To investigate the formation of the quantum Mollow quadruplet (QMQ) under arbitrary excitation strengths.
Main Methods:
- Exact analytical solution for optical response.
- Analysis of complex transition amplitudes in the Jaynes-Cummings ladder.
- Investigation of nonlinearities of different orders.
Main Results:
- The optical response is described by transition amplitudes between Jaynes-Cummings ladder states.
- Formation of a quantum Mollow quadruplet (QMQ) is demonstrated with increasing excitation pulse area.
- A closed-form analytic approximation for the QMQ is derived in the high-field, low-damping limit.
Conclusions:
- The study provides a comprehensive analytical framework for nonlinear optical response in coupled quantum systems.
- The quantum Mollow quadruplet offers a quantized view of the semiclassical Mollow triplet.
- The derived approximation simplifies the analysis of QMQ in specific physical regimes.
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