PhD: Anyon box in graphene (M/F)

Job Description

Thesis Subject

This PhD project aims to develop electrostatic traps to confine individual anyons in graphene at cryogenic temperatures and high magnetic fields. We will perform thermodynamic measurements to extract the fractional charge of the trapped particles.


Anyons are a type of quasiparticle that can be generated in low dimensional strongly interacting electronic system. The interest of anyons lies in their new quantum statistics, neither bosonic nor fermionic, which make it possible to manipulate the ground state of an electronic system by exchanging the position of its particles. This controlled exchange of the anyon positions, known as braiding, should lead to topological qubits with exceptionally low error rates. In addition, the possibility of exploring a new quantum statistics beyond the fermion-boson dichotomy is of considerable fundamental interest.

The most promising route to realizing anyons is the fractional quantum Hall effect, where a 2D electron system is subjected to a strong perpendicular magnetic field. Bilayer graphene has recently been shown to be a promising platform for probing anyons, thanks to the record energy gaps reported for its fractional quantum Hall states. The aim of this project is to trap a single anyon around an electrostatic potential well, in order to investigate the capability of such an “anyon box” structure for topological quantum computing. We will use ultra-sensitive aluminum single electron transistors, capacitively coupled to the anyon box, to probe its charge stability diagram. The candidate will be involved in all steps of the project, from sample fabrication to low noise cryogenic measurements of the anyon box quantum capacitance.

Required degree: Master in condensed matter physics

Your Work Environment

This thesis research will be conducted at the Institut Néel as part of the QuNES team. We have an on-site cleanroom for preparing samples and a dilution cryostat for taking measurements.

The Institut NÉEL is a CNRS unit (UPR 2940) under agreement with the University Grenoble Alpes. The laboratory is related to the CNRS Physique. It is located in Grenoble, in the heart of a unique scientific, industrial and cultural environment. It is one of the largest French national research institutes for fundamental research in condensed matter physics enriched by interdisciplinary activities at the interfaces with chemistry, engineering and biology. It consists of 450 employees, including 175 researchers.
CNRS is a public, scientific and technological organisation.
The core mandate is to identify, carry out ou have carried out, either alone or with partners, all research that advances science or contributes to the country's economic, social, and cultural progress. Internationally recognised for the excellence of its scientific research, the CNRS is a reference in the world of research and development, as well as for the general public.

Constraints and risks

No particular risks.

Compensation and benefits

Compensation

2300 € gross monthly

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

The research professions