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This is the joint module page of LV0622 "Supraleitende Quantenschaltkreise" and LV1569 "Cavity-, Circuit- und Waveguide-QED".

Information about scheduling, paper-allocations and all other relevant parts of the seminar will be disseminated via E-mail - please register to the course module on TUM online so I can include you in the mailing list. 

Within the seminars, students present state-of-the-art developments in modern quantum technology with superconducting quantum circuits. In this field, funamental research in academia has meanwhile triggered highly dynamical activities from established large corporations (Google, IBM, Intel etc.) and ambitious startups (Rigetti, IQM, HQS etc.). In particular, superconducting quantum circuits belong to the few prime candidates for a scalable quantum computer.

Time/Place

The seminar will take place on Tuesdays 12:15 - 14:00h, WMI-Seminarroom 143

Schedule

Below, you will soon find a list of papers we picked for the seminar. Please have a look, identify a paper that interests you and let us know which one you would like to present in the seminar until the first of May. 

You will be put in contact with a tutor, that will help you in preparing the slides for your presentation. Typically, you will have one or two sessions with your tutor.  

We will organize a schedule for the seminar talks, and I would ask you to keep the timeslot of the seminar free, and also join the presentations of your peers. Until the schedule is released, the seminar will not take place! After release, we will follow the schedule. 

Your seminar talk should be about 25 minutes long, with 10-15 minutes of scientific discussion afterwards. 

List of open topics for seminar talks in SoSe2025:
Please pick a topic related to your seminar - ie. theory for LV1569 and quantum computing, quantum sensing or hybrid systems for LV0622

Fabrication & Materials 

Millisecond lifetimes and coherence times in 2D transmon qubits, (Nature), Bland, Matthew P. et al., https://doi.org/10.1038/s41586-025-09687-4, 2025
Beta Tantalum Transmon Qubits with Quality Factors Approaching 10 Million, (arXiv), Joshi, Atharv et al., https://doi.org/10.48550/arXiv.2603.13174, 2026
Quantifying surface losses in superconducting aluminum microwave resonators, (arXiv), Hedrick, Elizabeth et al., https://doi.org/10.48550/arXiv.2603.13183, 2026
Impact of Oxygen Vacancies in Josephson Junction on Decoherence of Superconducting Qubits, (arXiv), Bai, Hanqin et al., https://doi.org/10.48550/arXiv.2603.11469, 2026
Structural control of two-level defect density revealed by high-throughput measurements of Josephson junctions, (arXiv), Wolff, Oliver F. et al., https://doi.org/10.48550/arXiv.2602.11469, 2026
Assessing the Sensitivity of Niobium- and Tantalum-Based Superconducting Qubits to Infrared Radiation, (arXiv), Kerschbaum, Michael et al., https://doi.org/10.48550/arXiv.2602.05806, 2026

Alternative Qubits & Qubit Designs 

Experimental realization of a cos(2φ) transmon qubit, (arXiv), Roverc'h, Erwan et al., https://doi.org/10.48550/arXiv.2603.13114, 2026
Demonstration of High-Fidelity Gates in a Strongly Anharmonic with Long-Coherence C-Shunt Flux Qubit, (arXiv), Zhao, Silu et al., https://doi.org/10.48550/arXiv.2603.11692, 2026
Non-Markovian relaxation spectroscopy of fluxonium qubits, (Nature Communications), Zhuang, Ze-Tong et al., https://doi.org/10.1038/s41467-026-69910-2, 2026
Localized quasiparticles in a fluxonium with quasi-two-dimensional amorphous kinetic inductors, (Nature Communications), Larson, Trevyn F. Q. et al., https://doi.org/10.1038/s41467-026-69709-1, 2026

Readout & Measurement 

Millimeter Wave Readout of a Superconducting Qubit, (arXiv), Dixit, Akash V. et al., https://doi.org/10.48550/arXiv.2603.13837, 2026
Flexible Readout and Unconditional Reset for Superconducting Multiqubit Processors with Tunable Purcell Filters, (Physical Review Letters), Xiao, Yong-Xi et al., https://doi.org/10.1103/vwrv-x1kr, 2026
Fast, high-fidelity Transmon readout with intrinsic Purcell protection via nonperturbative cross-Kerr coupling, (arXiv), Beaulieu, Guillaume et al., https://doi.org/10.48550/arXiv.2601.04975, 2026
Measurement-Induced State Transitions in Inductively-Shunted Transmons, (arXiv), Zobrist, Nicholas et al., https://doi.org/10.48550/arXiv.2603.12114, 2026
Selective and efficient quantum state tomography for multiqubit systems, (Physical Review Research), Patel, A. et al., https://doi.org/10.1103/hynl-kxl2, 2026

Noise, Decoherence & Error Sources

Distinguishing types of correlated errors in superconducting qubits, (arXiv), Binney, Hannah P. et al., https://doi.org/10.48550/arXiv.2603.16494, 2026
Characterization of Radiation-Induced Errors in Superconducting Qubits Protected with Various Gap-Engineering Strategies, (arXiv), Pinckney, H. Douglas et al., https://doi.org/10.48550/arXiv.2603.13460, 2026
Characterization of Drive-Induced Unwanted State Transitions in Superconducting Circuits, (APS / Physical Review X), Dai, W. et al., https://doi.org/10.1103/zdpg-mhpc, 2026

Gates, Control & Calibration

Fast microwave-driven two-qubit gates between fluxonium qubits with a transmon coupler, (Physical Review Applied), Singh, Siddharth et al., https://doi.org/10.1103/yxf3-jtx5, 2026
Millisecond-Scale Calibration and Benchmarking of Superconducting Qubits, (arXiv), Marciniak, Malthe A. et al., https://doi.org/10.48550/arXiv.2602.11912, 2026

Error Correction & Quantum Architectures

Quantum error correction below the surface code threshold, (Nature), Google Quantum AI and Collaborators et al., https://doi.org/10.1038/s41586-024-08449-y, 2025
Experimental demonstration of logical magic state distillation, (Nature), Sales Rodriguez, P. et al., https://doi.org/10.1038/s41586-025-09367-3, 2025
Strong Quantum Computational Advantage Using a Superconducting Quantum Processor, (Physical Review Letters), Fan, Daojin et al., https://doi.org/10.1103/PhysRevLett.127.180501, 2021
Lattice surgery realized on two distance-three repetition codes with superconducting qubits, (Nature Physics), Besedin, I. et al., https://doi.org/10.1038/s41567-025-03090-6, 2026
Demonstration of high-fidelity entangled logical qubits using transmons, (Nature Communications), Vezvaee, Arian et al., https://doi.org/10.1038/s41467-026-70011-3, 2026
Experimentally informed decoding of stabilizer codes based on syndrome correlations, (Physical Review Reasearch), Remm, Ants et al., https://doi.org/10.1103/z1ng-wg3k, 2026

Topical directions of the seminar:

• Foundations and applications of superconducting quantum circuits in quantum computing, quantum simulation, quantum communication, quantum sensing, and quantum metrology.
• Superconducting quantum technology: Resonators, waveguides, quantum bits, couplers, quantum-limited amplifiers, quantum processors, quantum error correction etc.
• State-of-the-art fabrication and measurement tachniques for superconducting quantum circuits.
• Investigation of the fundamental light-matter interaction "on a chip" using superconducting quantum circuits.
• Quantum information theoretical concepts: Entanglement, quantum gates, quantum algorithms, quantum memories, quantum measurements etc.
• The coupling of nanomechanical systems and spin ensembles to superconducting circuits.
• Challenges: longer quantum coherence, higher gate fidelities, scalability to a large number of qubits etc.
• Latest developments on the strive towards quantum advantages over conventional technology
• Propagating quantum microwaves emitted by superconducting circuits: quantum ressources, quantum microwave communication, quantum radar

You will be supported in the preparation of your talks from the research groups on superconducting quantum circuits, propagating quantum microwaves, and nanomechanics at the Walther-Meißner-Institute.

Learning Outcome:

After the successful completion of the module the students are able

• To prepare presentation slides on a scientific topic and to clearly present a topical research field within a scientific talk.
• To discuss on a state-of-the-art research field in a scientific way.
• To analyze and assess the latest development in quantum scinece and technology with superconducting circuits.
• To understand and explain the foundations of superconducting quantum systems and technology.
• To understand the foundations and the state of the art in quantum computing, quantum simulation, quantum communication, quantum sensing, and quantum metrology with supercondcuting circuits
• To understand the foundations and the state of the art in nanomechnical systems and spin ensembles

Preconditions:

Basic knowledge of condensed matter physics, foundations of quantum mechanics, quantum science and technology, quantum information processing, superconducting quantum circuits.