# A linear triple quantum dot system in isolated configuration

## TL;DR

This paper reports the experimental realization of a linear triple quantum dot system in an isolated regime, demonstrating charge stability and modeling, which could enhance quantum computing and simulation capabilities.

## Contribution

It introduces an isolated triple quantum dot system with fixed electron number, advancing control strategies for scalable quantum circuits.

## Key findings

- Charge stability diagrams for 1, 2, and 3 electrons were observed.
- The system was modeled using a capacitive model of the dots.
- The isolated regime offers advantages for quantum simulators and qubits.

## Abstract

The scaling up of electron spin qubit based nanocircuits has remained challenging up to date and involves the development of efficient charge control strategies. Here we report on the experimental realization of a linear triple quantum dot in a regime isolated from the reservoir. We show how this regime can be reached with a fixed number of electrons. Charge stability diagrams of the one, two and three electron configurations where only electron exchange between the dots is allowed are observed. They are modelled with established theory based on a capacitive model of the dot systems. The advantages of the isolated regime with respect to experimental realizations of quantum simulators and qubits are discussed. We envision that the results presented here will make more manipulation schemes for existing qubit implementations possible and will ultimately allow to increase the number of tunnel coupled quantum dots which can be simultaneously controlled.