Dr. Jan Goetz

Contact
https://meetiqm.com/de/about-us/
Assignments
  • Alumnus/Alumna: Quantum Systems
IDs

 

Jan Goetz was member of the Gross group as a Master and Ph.D. Student WMI between 2011 and 2017.

Master Thesis:  Gradiometric Flux Quantum Bits with Tunable Tunnel Coupling (November 2011)
Ph.D. Thesis: The Interplay of Superconducting Quantum Circuits and Propagating Microwave States (June 2017)

In his Ph.D. thesis, Jan Goetz studied the interplay of superconducting quantum circuits and fundamental properties of microwave states. In particular, he analyzed the loss mechanisms in coplanar waveguide resonators and in superconducting quantum bits. Using quantum bits as detectors, he could show the super-Poissonian photon statistics of weak thermal microwaves. He confirmed this result by direct measurements of the microwave fields using near-quantum-limited amplifiers. Furthermore, he studied selection rules for quadrupolar quantum bits via the symmetry of microwave fields.  

Jan Goetz left WMI in 2017 for a postdoc stay at Aalto university in Finland. He is CEO & Co-Founder of IQM Quantum Computers.

 

Publications of Dr. Jan Goetz

2021

In-situ tunable nonlinearity and competing signal paths in coupled superconducting resonators
Research Article | Physical Review B 103, 094515  (2021)
Preprint: arXiv:2009.13492
Michael Fischer, Qi-Ming Chen, Christian Besson, Peter Eder, Jan Goetz, Stefan Pogorzalek, Michael Renger, Edwar Xie, Michael J. Hartmann, Kirill G. Fedorov, Achim Marx, Frank Deppe, Rudolf Gross

2018

Compact 3D quantum memory
Research Article | Applied Physics Letters 112, 202601  (2018)
Edwar Xie, Frank Deppe, Michael Renger, Daniel Repp, Peter Eder, Michael Fischer, Jan Goetz, Stefan Pogorzalek, Kirill G. Fedorov, Achim Marx, and Rudolf Gross
Finite-time quantum entanglement in propagating squeezed microwaves
Research Article | Scientific Reports 8, 6416  (2018)
Kirill G. Fedorov, S. Pogorzalek, U. Las Heras, M. Sanz, P. Yard, P. Eder, M. Fischer, J. Goetz, E. Xie, K. Inomata, Y. Nakamura, R. Di Candia, E. Solano, A. Marx, F. Deppe, R. Gross
Parity-engineered light-matter interaction
Research Article | Physical Review Letters 121, 060503  (2018)
Jan Goetz, Frank Deppe, Kirill G. Fedorov, Peter Eder, Michael Fischer, Stefan Pogorzalek, Edwar Xie, Achim Marx, Rudolf Gross
Quantum probe of an on-chip broadband interferometer for quantum microwave photonics
Research Article | Supercond. Sci. Technol. 31, 115002  (2018)
P. Eder, T. Ramos, J. Goetz, M. Fischer, S. Pogorzalek, J. Puertas Martínez, E.P. Menzel, F. Loacker, E. Xie, J.J. Garcia-Ripoll, K.G. Fedorov, A. Marx, F. Deppe, R. Gross

2017

Hysteretic Flux Response and Nondegenerate Gain of Flux-Driven Josephson Parametric Amplifiers
Research Article | Physical Review Applied 8, 024012  (2017)
Stefan Pogorzalek, Kirill G. Fedorov, Ling Zhong, Jan Goetz, Friedrich Wulschner, Michael Fischer, Peter Eder, Edwar Xie, Kunihiro Inomata, Tsuyoshi Yamamoto, Yasunobu Nakamura, Achim Marx, Frank Deppe, Rudolf Gross
Photon Statistics of Propagating Thermal Microwaves
Research Article | Physical Review Letters 118, 103602  (2017)
J. Goetz, S. Pogorzalek, F. Deppe, K. G. Fedorov, P. Eder, M. Fischer, F. Wulschner, E. Xie, A. Marx, R. Gross
Second-order decoherence mechanisms of a transmon qubit probed with thermal microwave states
Research Article | Quantum Sci. Technol. 2, 025002  (2017)
J. Goetz, F. Deppe, P. Eder, M. Fischer, M. Müting, J. P. Martínez, S. Pogorzalek, F. Wulschner, E. Xie, K. G. Fedorov, A. Marx, R. Gross
The Interplay of Superconducting Quantum Circuits and Propagating Microwave States
PHD Thesis | Technical University of Munich  (2017)
Jan Goetz

2016

Displacement of propagating squeezed microwave states
Research Article | Physical Review Letters 117, 020502  (2016)
Kirill G. Fedorov, L. Zhong, S. Pogorzalek, P. Eder, M. Fischer, J. Goetz, E. Xie, F. Wulschner, K. Inomata, T. Yamamoto, Y. Nakamura, R. Di Candia, U. Las Heras, M. Sanz, E. Solano, E. P. Menzel, F. Deppe, A. Marx, R. Gross
Loss mechanisms in superconducting thin film microwave resonators
Research Article | Journal of Applied Physics 119, 015304  (2016)
J. Goetz, F. Deppe, M. Haeberlein, F. Wulschner, C. W. Zollitsch, S. Meier, M. Fischer, P. Eder, E. Xie, K. G. Fedorov, E. P. Menzel, A. Marx, and R. Gross
Tunable coupling of transmission-line microwave resonators mediated by an rf SQUID
Research Article | EPJ Quantum Technology 3, 10  (2016)
F. Wulschner, J. Goetz, F. R. Koessel, E. Hoffmann, A. Baust, P. Eder, M. Fischer, M. Haeberlein, M. J. Schwarz, M. Pernpeintner, E. Xie, L. Zhong, C. W. Zollitsch, B. Peropadre, J.-J. Garcia Ripoll, E. Solano, K. Fedorov, E. P. Menzel, F. Deppe, A. Marx, R. Gross
Ultrastrong coupling in two-resonator circuit QED
Research Article | Physical Review B 93, 214501  (2016)
A. Baust, E. Hoffmann, M. Haeberlein, M. J. Schwarz, P. Eder, J. Goetz, F. Wulschner, E. Xie, L. Zhong, F. Quijandria, D. Zueco, J.-J. Garcia Ripoll, L. Garcia-Alvarez, G. Romero, E. Solano, K. G. Fedorov, E. P. Menzel, F. Deppe, A. Marx, R. Gross

2015

Spin-boson model with an engineered reservoir in circuit quantum electrodynamics
Research Article | arXiv:1506.09114
Max Haeberlein, Frank Deppe, Andreas Kurcz, Jan Goetz, Alexander Baust, Peter Eder, Kirill Fedorov, Michael Fischer, Edwin P. Menzel, Manuel J. Schwarz, Friedrich Wulschner, Edwar Xie, Ling Zhong, Enrique Solano, Achim Marx, Juan-José García-Ripoll, Rudolf Gross
Tunable and Switchable Coupling Between Two Superconducting Resonators
Research Article | Physical Review B 91, 014515  (2015)
A. Baust, E. Hoffmann, M. Haeberlein, M. J. Schwarz, P. Eder, E. P. Menzel, K. Fedorov, J. Goetz, F. Wulschner, E. Xie, L. Zhong, F. Quijandria, B. Peropadre, D. Zueco, J.-J. Garcia Ripoll, E. Solano, F. Deppe, A. Marx, R. Gross

2013

Gradiometric flux qubits with tunable gap
Research Article | New Journal of Physics 15, 045001  (2013)
M. J. Schwarz, J. Goetz, Z. Jiang, T. Niemczyk, F. Deppe, A. Marx, R. Gross

2011

Gradiometric Flux Quantum Bits with Tunable Tunnel Coupling
Master Thesis | Technical University of Munich  (2011)
Jan Goetz
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