Domain, Specialties : Sciences et technologies des matériaux
Keywords:
quantum physics, superconductors,
Research Unit : DACM / LIDC2
Summary
Full description
Quantum computing is considered one of the
most promising advancements in
computational technology, with the potential
to solve problems that are considered
intractable using even the fastest conventional
supercomputers. At the heart of quantum
computers are qubits, which leverage
quantum mechanical principles to execute
operations. One of the leading technologies
for building quantum computers is
superconducting qubits thanks to their
scalability and compatibility with existing
semiconductor technologies. However, their
practical implementation remains hindered by
limited quantum coherence times, which are
crucial to maintain quantum states long
enough for reliable computation. One of the
dominant sources of decoherence in
superconducting qubits originates from twolevel system (TLS) defects located in the native
oxides of superconducting films and in nearby
dielectric regions. These TLS defects interact
with the electromagnetic fields of the qubits,
siphoning energy and leading to quantum
state decay or dephasing. Despite progress in
circuit design, TLS losses remain the bottleneck
for superconducting qubit performance. This
project proposes an innovative approach
to mitigate surface-related losses by
engineering passivating layers on
superconducting films. By combining Atomic
Layer Deposition (ALD) coatings and etching
with tailored thermal treatments, the project
aims at reducing TLS defect densities and
enhance qubit coherence lifetimes.
Location
Saclay
Internship conditions
- Internship duration: 6 months
- Level of study: Bac+5
- Training: Master 2
- Continuation in PhD thesis: Yes
- Application deadline: 2 mars 2026
Experimental skills
Language : English