Masterthesis: Quantum vs. Classical Spin Bath Dynamics in Diamond NV Centers 1

The Fraunhofer-Gesellschaft (www.fraunhofer.com) currently operates 76 institutes and research units throughout Germany and is a leading applied research organization.Around 32 000 employees work with an annual research budget of 3.4 billion euros.

At the Fraunhofer Institute for Applied Solid State Physics IAF we know our technologies like the back of our hand. Because we are one of the few scientific institutions worldwide to conduct research along the entire semiconductor value chain and on tailor-made synthetic diamonds. Whether high-frequency circuits for communications technology, voltage converter modules for electromobility, laser systems for measurement processes, or innovative hardware and software for quantum computers and quantum sensors: we develop tomorrow’s technology in-house for a sustainable and secure society. When will you join us?

What you will do

Quantum computing offers fundamentally new ways of information processing. Current quantum computers are reaching a size where they could be used to study real-world problems. However, they are still plagued by undesired interactions between different quantum bits (crosstalk) and between quantum bits and the environment (decoherence). These effects limit the size of quantum algorithms that can be successfully executed.

To improve the computational capabilities of current quantum computers, crosstalk errors and decoherence of a quantum computer need to be characterized and mitigation strategies need to be developed. With growing number of qubits, these tasks become very costly. In this thesis, more flexible and efficient methods will be developed to construct a so-called sparse Pauli-Lindblad error model of a superconducting quantum processor. This model will be used as the input for a so-called probabilistic-error-cancellation protocol that mitigates these errors such that longer quantum algorithms can be executed.

Your work will focus on

Transforming arbitrary quantum circuits through randomized compiling into a form where every quantum gate has a sparse Pauli-Lindblad error channel
Developing a more flexible method to measure and construct sparse Pauli-Lindblad channels than what is currently implemented in the qiskit quantum-computing API
Implementing an error mitigation protocol based on probabilistic error cancellation
Implementing and testing these methods on actual IBM quantum computers.

What you bring to the table

Enrolled Master student in physics, computer science or a comparable programme
Knowledge of quantum mechanics and quantum information theory
Good language skills in German and English
Enjoyment of theoretical work
Ability to work in a team, openness and motivation for independent and goal-oriented work

What you can expect

Personal support on an equal footing and assistance from experienced scientists and professionals throughout your thesis
A broad education in quantum science and technology
Attractive topics with the prospect of publication
Space for independent work and creative participation
Interactions with fellow Master and PhD students
Flexible working hours that fit your studies
An open and team-oriented corporate culture that allows you to contribute your own ideas
Diverse and exciting tasks in the environment of an internationally renowned research institution
Free parking garage with e-charging stations, as well as a Frelo station (bike rental system) and a bus stop directly at the institute

The weekly working time is 39 hours. This position is also available on a part-time basis. We value and promote the diversity of our employees' skills and therefore welcome all applications - regardless of age, gender, nationality, ethnic and social origin, religion, ideology, disability, sexual orientation and identity.Severely disabled persons are given preference in the event of equal suitability.

With its focus on developing key technologies that are vital for the future and enabling the commercial utilization of this work by business and industry, Fraunhofer plays a central role in the innovation process. As a pioneer and catalyst for groundbreaking developments and scientific excellence, Fraunhofer helps shape society now and in the future.

Interested? Apply online now. We look forward to getting to know you!

Fraunhofer Institute for Applied Solid State Physics IAF

Human Resources

Tullastrasse 72

79108 Freiburg

Fraunhofer Institute for Applied Solid State Physics IAF

www.iaf.fraunhofer.de

Requisition Number: 81910 Application Deadline:

**Job Segment:**Computer Science, Semiconductor, Testing, Physics, Part Time, Technology, Science

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Masterarbeit: Quantum vs. Classical Spin Bath Dynamics in Diamond NV Centers

Masterarbeit: Quantum vs. Classical Spin Bath Dynamics in Diamond NV Centers