Shot noise and transport in small quantum cavities with large openings

TL;DR

This paper analyzes quantum transport in small cavities with large openings, showing how shot noise suppression reveals deterministic pathways and distinguishes them from indeterministic processes.

Contribution

It introduces a dynamical analysis method using quantum mechanical calculations of S matrices and poles to identify deterministic transport in quantum billiards.

Findings

Shot noise suppression indicates deterministic transport pathways.

Special states strongly coupled to leads support direct processes.

System-specific shot noise suppression demonstrates deterministic behavior.

Abstract

We present a dynamical analysis of the transport through small quantum cavities with large openings. The systematic suppression of shot noise is used to distinguish direct, deterministic from indirect, indeterministic transport processes. The analysis is based on quantum mechanical calculations of $S$ matrices and their poles for quantum billiards with convex boundaries of different shape and two open channels in each of the two attached leads. Direct processes are supported when special states couple strongly to the leads, and can result in deterministic transport as signified by a striking system-specific suppression of shot noise.