Microwave graphs analogs for the voltage drop in three-terminal devices with orthogonal, unitary and symplectic symmetry

TL;DR

This study uses microwave graphs to simulate three-terminal devices with different symmetries, revealing localization phenomena and confirming theoretical models with experimental data.

Contribution

It introduces microwave graph analogs for three-terminal devices with orthogonal, unitary, and symplectic symmetry, demonstrating localization effects and validating theoretical predictions.

Findings

Observation of weak localization and antilocalization phenomena.

Good agreement between experimental data and theoretical models.

Effect of dissipation and imperfect coupling accounted for in analysis.

Abstract

Transmission measurements through three-port microwave graphs are performed in a symmetric setting, in analogy to three-terminal voltage drop devices with orthogonal, unitary, and symplectic symmetry. The terminal used as a probe is symmetrically located between two chaotic graphs, each graph is connected to one port, the input and the output, respectively. The analysis of the experimental data exhibit the weak localization and antilocalization phenomena in a clear fashion. We find a good agreement with theoretical predictions, provided that the effect of dissipation and imperfect coupling to the ports are taken into account.