Purified pseudomode model for nonlinear system-bath interactions

• URL: http://arxiv.org/abs/2502.18707v1
• Date: Tue, 25 Feb 2025 23:56:47 GMT
• Title: Purified pseudomode model for nonlinear system-bath interactions
• Authors: Cheng Zhang, Neil Lambert, Xin-Qi Li, Mauro Cirio, Pengfei Liang,
• Abstract summary: We extend the theory of purified pseudomodes to allow for the description of general nonlinear system-bath interactions.<n>Our method provides a useful tool for the study of phonon-assisted emission in quantum dots and holds the the promise for broad applications in fields like quantum biology, nonlinear phononics, and nanophotonics.
• Score: 6.017893401723144
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The theory of purified pseudomodes [arXiv:2412.04264 (2024)] was recently developed to provide a numerical tool for the analysis of the properties of a quantum system and the environment it couples to via linear system-bath interactions. Here we extend this theory to allow for the description of general nonlinear system-bath interactions. We demonstrate the validity of our method by considering the spontaneous decay of a two-level atom placed inside a single-mode lossy cavity and furthermore, its potential application to nanophotonics by calculating the resonance fluorescence spectrum of a quantum dot in the presence of a phonon environment. Our method provides a useful tool for the study of phonon-assisted emission in quantum dots and holds the the promise for broad applications in fields like quantum biology, nonlinear phononics, and nanophotonics.

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