Observation of the Bloch-Siegert shift in a qubit-oscillator system in the ultrastrong coupling regime P Forn-Díaz, J Lisenfeld, D Marcos, JJ Garcia-Ripoll, E Solano, ... arXiv preprint arXiv:1005.1559, 2010 | 823 | 2010 |

Towards understanding two-level-systems in amorphous solids-insights from quantum circuits C Müller, JH Cole, J Lisenfeld Reports on Progress in Physics 82, 124501, 2019 | 419 | 2019 |

Implementation of superconductor/ferromagnet/superconductor π-shifters in superconducting digital and quantum circuits AK Feofanov, VA Oboznov, VV Bol’Ginov, J Lisenfeld, S Poletto, ... Nature Physics 6 (8), 593-597, 2010 | 294 | 2010 |

Quantum dynamics of a single vortex A Wallraff, A Lukashenko, J Lisenfeld, A Kemp, MV Fistul, Y Koval, ... Nature 425 (6954), 155-158, 2003 | 216 | 2003 |

Correlating decoherence in transmon qubits: Low frequency noise by single fluctuators S Schlör, J Lisenfeld, C Müller, A Schneider, DP Pappas, AV Ustinov, ... Phys. Rev. Lett. 123, 190502, 2019 | 174 | 2019 |

Observation of directly interacting coherent two-level systems in an amorphous material J Lisenfeld, GJ Grabovskij, C Müller, JH Cole, G Weiss, AV Ustinov Nature communications 6 (1), 6182, 2015 | 174 | 2015 |

Enhanced Macroscopic Quantum Tunneling in BiSrCaCuO Intrinsic Josephson Junction Stacks XY Jin, J Lisenfeld, Y Koval, A Lukashenko, AV Ustinov, P Müller arXiv preprint cond-mat/0603445, 2006 | 167 | 2006 |

Strain tuning of individual atomic tunneling systems detected by a superconducting qubit GJ Grabovskij, T Peichl, J Lisenfeld, G Weiss, AV Ustinov Science 338 (6104), 232-234, 2012 | 166 | 2012 |

Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits C Müller, J Lisenfeld, A Shnirman, S Poletto Physical Review B 92 (3), 035442, 2015 | 160 | 2015 |

Measuring the temperature dependence of individual two-level systems by direct coherent control J Lisenfeld, C Müller, JH Cole, P Bushev, A Lukashenko, A Shnirman, ... arXiv preprint arXiv:1008.0337, 2010 | 105 | 2010 |

Electric field spectroscopy of material defects in transmon qubits J Lisenfeld, A Bilmes, A Megrant, R Barends, J Kelly, P Klimov, G Weiss, ... npj Quantum Information 5 (1), 105, 2019 | 98 | 2019 |

Static and dynamic properties of 0, π, and 0− π ferromagnetic Josephson tunnel junctions J Pfeiffer, M Kemmler, D Koelle, R Kleiner, E Goldobin, M Weides, ... Physical Review B 77 (21), 214506, 2008 | 98 | 2008 |

Decoherence spectroscopy with individual two-level tunneling defects J Lisenfeld, A Bilmes, S Matityahu, S Zanker, M Marthaler, M Schechter, ... Scientific Reports, 23786, 2016 | 92 | 2016 |

Selective darkening of degenerate transitions demonstrated with two superconducting quantum bits PC De Groot, J Lisenfeld, RN Schouten, S Ashhab, A Lupaşcu, ... Nature Physics 6 (10), 763-766, 2010 | 89 | 2010 |

Temperature dependence of coherent oscillations in Josephson phase qubits J Lisenfeld, A Lukashenko, M Ansmann, JM Martinis, AV Ustinov Physical review letters 99 (17), 170504, 2007 | 78 | 2007 |

Resolving the positions of defects in superconducting quantum bits A Bilmes, A Megrant, P Klimov, G Weiss, JM Martinis, AV Ustinov, ... Scientific reports 10 (1), 3090, 2020 | 60 | 2020 |

Rabi spectroscopy of a qubit-fluctuator system J Lisenfeld, C Müller, JH Cole, P Bushev, A Lukashenko, A Shnirman, ... Physical Review B 81 (10), 100511, 2010 | 58 | 2010 |

Coherent oscillations in a superconducting tunable flux qubit manipulated without microwaves S Poletto, F Chiarello, MG Castellano, J Lisenfeld, A Lukashenko, ... New Journal of Physics 11 (1), 013009, 2009 | 56 | 2009 |

Quantitative evaluation of defect-models in superconducting phase qubits JH Cole, C Müller, P Bushev, GJ Grabovskij, J Lisenfeld, A Lukashenko, ... Applied Physics Letters 97 (25), 2010 | 55 | 2010 |

Multiphoton spectroscopy of a hybrid quantum system P Bushev, C Müller, J Lisenfeld, JH Cole, A Lukashenko, A Shnirman, ... Physical Review B 82 (13), 134530, 2010 | 45 | 2010 |