Nonlinear optical spectroscopy of open quantum systems.

• Tác giả: Michael Galperin, Upendra Harbola, Shaul Mukamel, Haoran Sun
• Ngôn ngữ: eng
• Ký hiệu phân loại: 629.836 Nonlinear systems
• Thông tin xuất bản: United States : The Journal of chemical physics , 2025
• Bộ sưu tập: NCBI
• ID: 214166

Tóm tắt

The development of experimental techniques at the nanoscale has enabled the performance of spectroscopic measurements on single-molecule current-carrying junctions. These experiments serve as a natural intersection for the research fields of optical spectroscopy and molecular electronics. We present a pedagogical comparison between the perturbation theory expansion of standard nonlinear optical spectroscopy and the (non-self-consistent) perturbative diagrammatic formulation of the nonequilibrium Green's functions method (which is widely used in molecular electronics), highlighting their similarities and differences. By comparing the two approaches, we argue that the optical spectroscopy of open quantum systems must be analyzed within the more general Green's function framework.