Stellenangebote

 

Postdoc and PhD positions in Theoretical Quantum Technology at RWTH Aachen University and Forschungszentrum Jülich

The theoretical quantum technology research group led by Prof. Markus Müller is seeking excellent, highly motivated and independent postdoctoral researchers and PhD students. The Müller group recently relocated to the Institute for Quantum Information at RWTH Aachen University and the Peter-Grünberg-Institute for Theoretical Nanotechnology at the Forschungszentrum Jülich in Germany.

The Müller group forms part of a growing highly dynamical research environment with focus on fundamental and practical quantum information science, with the overarching goal of contributing to the realization of large-scale quantum processors. Activities in this direction include participation in the EU Quantum Technology Flagship initiatives OpenSuperQ and AQTION, the Jülich-Aachen Research Alliance (JARA), quantum information research at PGI-2, PGI-8 and PGI-11, and the Cluster of Excellence ‘Matter and Light for Quantum Computing’ (ML4Q) involving the universities of Cologne, Aachen, Bonn and Forschungszentrum Jülich.

The successful candidates will have the opportunity to contribute to one of the following research projects:

  • ERC Starting Grant Open Quantum Neural Networks: From Fundamental Concepts to Implementations with Atoms and Photons"
  • EU Quantum Technology Flagship collaboration "Advanced quantum computing with trapped ions (AQTION)"
  • International research collaborations "Encoded Qubit Alive (eQual)" and "Certified Topological Quantum Computation (CETO)"

Research topics include, but are not limited to:

  • The theoretical development of realistic implementation schemes for quantum error correction and fault-tolerant quantum information processing in state-of-the-art noisy intermediate-scale quantum (NISQ) devices, with a focus on AMO systems as e.g. trapped ions or cold Rydberg atoms and ions;
  • The development of new methods to efficiently characterise quantum devices and phases, including experimental quantum error correcting codes, logical qubits and operations on them;
  • The exploration of intriguing connections of topological quantum error correction with classical spin models and topological phases in condensed matter;
  • Classical machine learning for applications in quantum computing and quantum error correction, as well as quantum machine learning.

More information on Müller group and main current research lines can be found here.

Requirements for Postdoc applicants

We are looking for candidates who meet the following requirements:

  • PhD in physics, computer science or a closely related field;
  • A strong background and research experience in one or several of the following areas: quantum information and quantum error correction, quantum optics, atomic physics, topological quantum computation, statistical physics, computer science;
  • Experience in programming;
  • Experience in (co-)supervising students (desirable);
  • Highly motivated and enthusiastic;
  • Good communication skills, able to work in a team and to collaborate with PhD and master students on related topics;
  • Fluent in spoken and written English;
  • Proven record and proficiency in writing research publications.

Requirements for PhD applicants

We are looking for candidates who meet the following requirements:

  • MSc or equivalent degree in physics, computer science or a related field;
  • Background in quantum computing, particularly in quantum error correction desirable;
  • Experience in programming;
  • Highly motivated and enthusiastic;
  • Good communication skills and able to work in a team;
  • Fluent in spoken and written English.

Information and Application:

For more information about these positions please contact .

To apply, please email your letter of application, explaining your motivation, research experience and interests, together with your CV and contact details of two referees to Prof. Müller. Applications will be processed on a rolling basis and the positions will remain open until suitable candidates have been identified.

The salary of the PhD (postdoc) positions will be according to 75% (100%) of the E13 salary scale (NRW), varying on the relevant experience of applicants, and with a starting date as soon as possible. The postdoc contracts are fixed-term positions for up to three years.

We promote equal opportunities and diversity in employment relations. Our group particularly welcomes applications from women and applicants with diverse backgrounds.

 

PostDoc position on Silicon-based multi electron-spin qubit device at QuTech, RWTH Aachen University

The QuTech group at RWTH Aachen University is looking for a motivated postdoctoral researcher paving the way towards industry-compatible qubit device fabrication and a 2x20 electron-spin qubit.

Project
This 3-year project focuses on the employment of high-yield fabrication techniques to demonstrate and characterize multiple electron spin qubits in two parallel quantum dot chains.
Our project in close collaboration with the RWTH institute of semiconductor technology (headed by Prof. Joachim Knoch) aims at an unprecedented 2x20 quantum dot device in a SiGe heterostructure. All neighboring qubits can be tunnel coupled by tuning the individual intra- and inter potential barriers of each chain. Inducing qubits in one chain and a single electron transistor in the other, the interchain coupling can be tuned to be capacitive allowing electron spin read-out.
The gate structure consists of two large screening gates and a second gate layer of metallic fine gates. The underlying gate fabrication technique is based on the self-aligned spacer process in combination with metallization and a damascene process (Klos, J. et al., Appl. Sci. 2019, 9, 3823), which is extensively used in industry and fundamentally different from the traditionally used lift-off process. Using this technology, a high density gate pattern of 30 nm insulated superconducting gates on a 45 nm pitch can be fabricated in a single layer.
Combining the development of appropriate fabrication technologies to facilitate groundbreaking work on multi quantum dot/qubit devices, the approach has the potential to provide highly relevant contributions to the science and technology of the field. This includes detailed statistical characterization of charge noise and local valley splitting, the automated tuning of multiple quantum dots and performing single and two-qubit gates with high fidelity on a multi qubit device. Furthermore, since the technology development will be as close as possible to current industrial processes it may help accelerating the realization of future quantum information processors.

The selected candidate is expected to focus their research on one or more of the following areas:

  • Device design and fabrication in local clean-room.
  • Characterization of the devices including transport measurements at 10 mK.
  • Characterization of the performance of qubits located within the quantum dot chain.
  • Design and execution of protocols for the operation of the device.
  • Gate tuning automatization.

Application are welcome from individuals who have:

  • A PhD in Physics or Engineering Sciences and strong publications in experimental physics, quantum computation or related fields.
  • Experience in electrical characterization of devices at cryogenic temperature, and clean-room experience is highly appreciated.
  • Good communication skills, willingness to work in a team and to collaborate with PhD and master students on related topics.

Group – QuTech Aachen
We are a young group consisting of four PostDocs, 15 PhD students and multiple Master- and Bachelor students subdivided in two larger subgroups led by Professor Hendrik Bluhm and Dr. Lars Schreiber focusing on GaAs and silicon-based material systems, respectively. In silicon quantum computation we cooperate with IKZ, IHP, Regensburg University, TU Delft, imec and IP PAS. Mixed task responsibilities, frequent group meetings and group internal seminars share wisdom and knowledge among all group members, while general academic innovations and state-of-the-art are covered by weekly journal clubs. Apart the regular work hours, we arrange multiple pub crawls and institute-retreats including skiing, sailing trips and sport events.

Institute
The 2nd institute of physics incorporates multiple different research activities focusing on solid-states experimental physics including quantum technology and 2D materials such as graphene-based research as well as topological insulators. The overall institute provides extensive expertise in low temperature measurements using more than ten cryostats including inhouse helium liquification. Sample fabrication is done in two major cleanroom facilities namely the Central Laboratory for Micro- and Nanotechnology at RWTH and the Helmholtz Nano Facility at FZJ providing together more than 1500 m2. Further, the quantum technology group represents the experimental part of the overall Jülich-Aachen-Research-Alliance Institute for Quantum Information (JARA-IQI), which is a research collaboration between RWTH Aachen University and Forschungszentrum Jülich (FZJ). On the theoretical side within JARA-IQI, groups focus on general quantum information (lead by Prof. David DiVincenzo, Prof. B. Terhal and Prof. F. Hassler).

Location
Aachen, known as a "Europastadt" (City of Europe), is Germany’s westernmost major city close to the German metropolis Cologne and Düsseldorf. Three nations with three languages converge at its boundaries putting Aachen at the center of a dynamic, cross-border region between Germany, the Netherlands and Belgium The resident RWTH Aachen University is one of the top ten German universities with extensive focus on Engineering and Natural sciences with currently more than 45,000 students. Because of the academic expertise here, RWTH Aachen Campus, Forschungszentrum Jülich and numerous research centers of international corporate groups have been established in and around Aachen, making the urban region a Silicon Valley at the heart of Europe.

Application procedure
Applications shall be submitted via email to Dr. Lars Schreiber. Should you have any questions about the application process or regarding vacancies please contact or . Applications will be processed on a rolling basis and the positions will remain open until suitable candidates have been identified. The salary of the postdoc positions will be according to 100% of the E13 salary scale (NRW), varying on the relevant experience of applicants, and with a starting date as soon as possible. The postdoc contracts are fixed-term positions for up to three years. We promote equal opportunities and diversity in employment relations. Our group particularly welcomes applications from women and applicants with diverse backgrounds.

 

General Inquiries

Even when there are no officially posted openings, we are always looking for enthusiastic students and postdocs. Please contact the institute faculty to discuss current opportunities.

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