Dr. Alexander Baust

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Assignments
  • Alumnus/Alumna: Quantum Systems

 

Alexander Baust was member of the Gross group at WMI as a Master and Ph.D. Student between 2009 and 2015.

Master Thesis: Characterization of Flux-driven Josephson Parametric Amplifiers (2010)
Ph.D. Thesis: Tunable Coupling and Ultrastrong Interaction in Circuit Quantum Electrodynamics (2015)

Alexander Baust was working on superconducting quantum circuits, in particular on establishing strong and ultra-strong coupling in circuit QED systems. For future quantum information and quantum simulation architectures with superconducting circuits, a profound understanding of the coupling mechanisms between the individual building blocks is essential. In his Ph.D. thesis, he investigated galvanically coupled qubit-resonator systems, demonstrated the phenomenon of ultrastrong coupling, and realized qubit-mediated tunable and switchable coupling between two frequency-degenerate coplanar microwave resonators.

He left WMI in June 2015 to join the German Patent and Trade Mark Office (DPMA).

 

Publications of Dr. Alexander Baust

2016

ICON publication
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
ICON publication
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

ICON publication
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
ICON publication
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
ICON publication
Tunable Coupling and Ultrastrong Interaction in Circuit Quantum Electrodynamics
PHD Thesis | Technical University of Munich  (2015)
Alexander Baust

2013

ICON publication
Squeezing with a flux-driven Josephson parametric amplifier
Research Article | New. J. Phys. 15, 125013  (2013)
L. Zhong, E. P. Menzel, R. Di Candia, P. Eder, M. Ihmig, A. Baust, M. Haeberlein, E. Hoffmann, K. Inomata, T. Yamamoto, Y. Nakamura, E. Solano, F. Deppe, A. Marx, R. Gross

2012

ICON publication
Path Entanglement of Continuous-Variable Quantum Microwaves
Research Article | Physical Review Letters 109, 250502  (2012)
E. P. Menzel, R. Di Candia, F. Deppe, P. Eder, L. Zhong, M. Ihmig, M. Haeberlein, A. Baust, E. Hoffmann, D. Ballester, K. Inomata, T. Yamamoto, Y. Nakamura, E. Solano, A. Marx, R. Gross

2011

ICON publication
Selection rules in a strongly coupled qubit-resonator system
Research Article | arXiv:1107.0810v1
T. Niemczyk, F. Deppe, E. P. Menzel, M. J. Schwarz, H. Huebl, F. Hocke, M. Häberlein, M. Danner, E. Hoffmann, A. Baust, E. Solano, J. J. Garcia-Ripoll, A. Marx, R. Gross

2010

ICON publication
Characterization of Flux-driven Josephson Parametric Amplifiers
Master Thesis | Technical University of Munich  (2010)
Alexander Baust
ICON publication
Dual-Path State Reconstruction Scheme for Propagating Quantum Microwaves and Detector Noise Tomography
Research Article | Physical Review Letters 105, 100401  (2010)
E.P. Menzel, M. Mariantoni, F. Deppe, M.A. Araque Caballero, A. Baust, T. Niemczyk, E. Hoffmann, A. Marx, E. Solano, R. Gross
ICON publication
Planck Spectroscopy and the Quantum Noise of Microwave Beam Splitters
Research Article | Physical Review Letters 105, 133601  (2010)
M. Mariantoni, E. P. Menzel, F. Deppe, M. A. Araque Caballero, A. Baust, T. Niemczyk, E. Hoffmann, E. Solano, A. Marx, R. Gross
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