# Simple quantum graphs proposal for quantum devices

## TL;DR

This paper explores quantum graphs as a basis for designing quantum devices, revealing two key quantum effects related to transport efficiency and transmission peaks, with potential applications in various nanostructures.

## Contribution

It introduces a novel approach to quantum device design using simple quantum graphs, identifying two fundamental quantum effects influencing transport.

## Key findings

- Identification of transport inefficiency in quantum graphs
- Discovery of full transmission peaks within transport suppression regions
- Proposal of device structures based on microwave, optical fibers, and nanostructures

## Abstract

The control of the quantum transport is an issue of current interest for the construction of new devices. In this work, we investigate this possibility in the realm of quantum graphs. The study allows the identification of two distinct periodic quantum effects which are related to quantum complexity, one being the identification of transport inefficiency, and the other the presence of peaks of full transmission inside regions of suppression of transport in some elementary arrangements of graphs. Motivated by the power of quantum graphs, we elaborate on the construction of simple devices, based on microwave and optical fibers networks, and also on quantum dots, nanowires and nanorings. The elementary devices can be used to construct composed structures with important quantum properties, which may be used to manipulate the quantum transport.