Two-dimensional spectroscopy of open quantum systems

TL;DR

This paper develops a theoretical framework for two-dimensional spectroscopy of open quantum systems, combining optical photon flux measurements with electron transport data, using nonequilibrium Green's functions.

Contribution

It introduces a novel theoretical approach for analyzing open quantum systems with multiple fluxes through two-dimensional spectroscopy, supported by numerical simulations.

Findings

Theoretical formulation for flux-based 2D spectroscopy in quantum junctions

Numerical simulations demonstrating the method's applicability

Insights into coupled optical and electronic fluxes in quantum systems

Abstract

Two-dimensional spectroscopy is discussed for open quantum systems with multiple simultaneously measurable fluxes. In particular, we discuss a junction where optical measurements of photon flux are complemented with simultaneous transport measurements of electron currents. Theory of two-dimensional spectroscopy in both fluxes is developed employing non-self-consistent nonequilibrium Green's function formulation. Theoretical derivations are illustrated with numerical simulations within generic junction model.