Contributions to Conferences,
Workshops and Seminars

Talks and Posters Presentations

Circuit Quantum Electrodynamics: A New Architecture for Superconducting Quantum Computation (invited talk),
A. Wallraff
2005 APS March Meeting Los Angeles, CA, USA; March 21–25, 2005

Measurement induced dephasing of a superconducting qubit strongly coupled to a resonator (contributed talk),
Jay Gambetta, Alexandre Blais, David Schuster, Andreas Wallraff, Ren-Shou Huang, Johannes Majer, Luigi Frunzio, Steven Girvin, Robert Schoelkopf
2005 APS March Meeting Los Angeles, CA, USA; March 21–25, 2005

Short course on:
New Trends in Superconductor Electronics: Superconducting Qubits (invited lecture),
A. Wallraff
Applied Superconductivity Conference, Jacksonville, Florida, USA, October 3-8, 2004

Strong coupling cavity QED with superconducting circuits (invited talk),
A. Wallraff
Workshop on Microcavities in Quantum Optics, Ringberg Castle, Germany September 21-24, 2004

Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box (invited talk),
A. Wallraff
International Workshop on Solid State Based Quantum Information Processing September 13 - 17, 2004, Herrsching, Germany

Circuit quantum electrodynamics: observing strong coupling between a superconducting qubit and a photon (invited talk),
A. Wallraff
Workshop on Quantum Systems out of Equilibrium, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy, June 14-25, 2004

Doing atomic physics with electrical circuits: Strong-coupling cavity QED (invited talk),
A. Wallraff
Correlated Electron Systems, Mount Holyoke College South Hadley, MA, USA, June 20-25, 2004

Quantum dynamics of Josephson vortices (invited talk),
A. Wallraff, A. Lukashenko, J. Lisenfeld, A. Kemp, Y. Koval, M. V. Fistul, A. V. Ustinov, and B. A. Malomed
Fluctuations and Noise 2004, Maspalomas, Gran Canaria, Spain, 25-28 May 2004

Quantum dynamics of Josephson vortices (talk),
A. Wallraff, A. Lukashenko, J. Lisenfeld, A. Kemp, Y. Koval, M. V. Fistul, A. V. Ustinov, and B. A. Malomed
Spring Meeting of the American Physical Society (APS), Montreal, Quebec, Canada, March 22-26, 2004

Strong cavity quantum electrodynamics with superconducting circuits (talk),
Andreas Wallraff, Alexandre Blais, Ren-Shou Huang, David Schuster, Luigi Frunzio, Hannes Majer, Steven Girvin, Robert Schoelkopf
Spring Meeting of the American Physical Society (APS), Montreal, Quebec, Canada, March 22-26, 2004

Coherent control and effect of noise on a qubit inside a resonator (talk),
Ren-Shou Huang, Alexandre Blais, Andreas Wallraff, Rob Schoelkopf, Steven Girvin
Spring Meeting of the American Physical Society (APS), Montreal, Quebec, Canada, March 22-26, 2004

Entanglement and quantum non-demolition read-out of superconducting qubits in a microwave resonator (talk),
Alexandre Blais, Ren-Shou Huang, Andreas Wallraff, Rob Schoelkopf, Steven Girvin
Spring Meeting of the American Physical Society (APS), Montreal, Quebec, Canada, March 22-26, 2004

Fabrication and measurement of a superconducting cavity QED circuit (talk)
David Schuster, Andreas Wallraff, Luigi Frunzio, Hannes Majer, Alexandre Blais, Ren-Shou Huang, Steven Girvin, Robert Schoelkopf
Spring Meeting of the American Physical Society (APS), Montreal, Quebec, Canada, March 22-26, 2004

Characterization of qubits based on current-biased Josephson junctions (poster),
J. Lisenfeld, C. Coqui, A. Kemp, A. Lukashenko, A. Wallraff, and A.V. Ustinov,
Spring Meeting of the German Physical Society (DPG), Regensburg, Germany, March 8-12, 2004

Microwave spectroscopy of long Josephson junctions in the quantum regime (poster),
A. Kemp, A. Lukashenko, Y. Koval, J. Lisenfeld, M.V. Fistul, A. Wallraff and A.V. Ustinov,
Spring Meeting of the German Physical Society (DPG), Regensburg, Germany, March 8-12, 2004

Exploring quantum dynamics of Josephson vortices (invited talk),
A.V. Ustinov, A. Wallraff, M.V. Fistul, A. Kemp, A. Lukashenko, J. Lisenfeld, and Y. Koval,
Spring Meeting of the German Physical Society (DPG), Regensburg, Germany, March 8-12, 2004

Quantum dissociation of a vortex-antivortex pair in a long Josephson junction (talk),
M.V. Fistul, A. Wallraff, Y. Koval, A. Lukashenko, B.A. Malomed and A.V. Ustinov ,
Spring Meeting of the German Physical Society (DPG), Regensburg, Germany, March 8-12, 2004

Vortex Qubits: Experiments with Josephson Vortices in the Quantum Regime (invited talk),
A.V. Ustinov, A. Wallraff, M.V. Fistul, A. Kemp, A. Lukashenko, J. Lisenfeld, Y. Koval,
Solid State Quantum Information Processing Conference, Amsterdam, The Netherlands, December 15-18, 2003.

Quantum State Manipulation in Current-Biased Josephson Junctions (poster),
J. Lisenfeld, A. Lukashenko, A. Kemp, A. Wallraff, and A. V. Ustinov,
Solid State Quantum Information Processing Conference, Amsterdam, The Netherlands, December 15-18, 2003.

Quantum Dynamics of a Single Josephson Vortex (poster),
A. Wallraff, A. Lukashenko, J. Lisenfeld, A. Kemp, Y. Koval, M. V. Fistul, and A. V. Ustinov,
Solid State Quantum Information Processing Conference, Amsterdam, The Netherlands, December 15-18, 2003.

A route towards on-chip cavity QED: A Cooper pair box coupled to a superconducting resonator (poster),
Andreas Wallraff, Alexandre Blais, Ren-Shou Huang, Hannes Majer, David Schuster, Luigi Frunzio, Steve Girvin, Rob Schoelkopf,
Solid State Quantum Information Processing Conference, Amsterdam, The Netherlands, December 15-18, 2003.

Backaction Effects of a SSET Measuring a Qubit (poster),
B. Turek, J.B. Majer, A.A. Clerk, S.M. Girvin, K. Bladh, D. Gunnarsson, P. Delsing, A. Wallraff, R. Schoelkopf,
Solid State Quantum Information Processing Conference, Amsterdam, The Netherlands, December 15-18, 2003.

Quantum Dynamics of a Single Josephson Vortex (invited talk),
A. Wallraff, J. Lisenfeld, A. Lukashenko, A. Kemp, M. V. Fistul, Y. Koval, and A. V. Ustinov,
Workshop of the European Science Foundation Pi-Shift Program on Josephson junctions, basic studies and novel applications., Jena, Germany, June 16 - 19, 2003.

Quantum Dynamics of a Single Josephson Vortex (invited talk),
A. Wallraff, J. Lisenfeld, A. Lukashenko, A. Kemp, M. V. Fistul, Y. Koval, and A. V. Ustinov,
International Workshop on classical and quantum barrier transport in complex systems, Max Planck institute for Complex Systems, Dresden, Germany, May 20 - 24, 2003

Observation of quantum tunneling of a Josephson vortex (invited symposium talk),
Andreas Wallraff, Jürgen Lisenfeld, Alexandr Lukashenko, Yuri Koval, Misha Fistul and Alexey Ustinov,
Spring Meeting of the German Physical Society (DPG), Dresden, Germany, March 24 - March 28, 2003

Josephson phase escape in long Josephson junctions by quantum nucleation of vortex-antivortex pairs (poster),
M. V. Fistul, A. Wallraff, Yu. Koval, J. Lisenfeld, A. Lukashenko and A. V. Ustinov,
Spring Meeting of the German Physical Society (DPG), Dresden, Germany, March 24 - March 28, 2003

Low noise data acquisition system for measurements of metastable states in Josephson junctions (poster),
C. Coqui, A. Kemp, J. Lisenfeld, A. Wallraff and A.V. Ustinov,
Spring Meeting of the German Physical Society (DPG), Dresden, Germany, March 24 - March 28, 2003

Characterization and selection of heart-shaped Josephson, (poster)
A. Kemp, Y. Koval, A. Lukashenko, A. Wallraff and A.V. Ustinov,
Spring Meeting of the German Physical Society (DPG), Dresden, Germany, March 24 - March 28, 2003

Time-resolved observation of macroscopic quantum tunneling in a Josephson junction (invited symposium talk),
J. Lisenfeld, A. Lukashenko, C. Coqui, A. Kemp, M. V. Fistul, A. Wallraff and A. V. Ustinov,
Spring Meeting of the German Physical Society (DPG), Dresden, Germany, March 24 - March 28, 2003

Observation of the Quantum Dynamics of a Single Vortex in a Long Josephson Junction, (talk)
A. Wallraff, J. Lisenfeld, A. Lukashenko, M. V. Fistul, Y. Koval, and A. V. Ustinov,
Spring Meeting of the American Physical Society (APS), Austin, USA, March 3 - March 7, 2003

State Preparation and Readout Techniques for a Josephson Vortex Qubit. (poster)
A. Kemp, A. Wallraff, and A. V. Ustinov.
EURESCO^Conference on Future Perspectives of Superconducting Josephson Devices, Pommersfelden, Germany, June 29 - July 4, 2002

Quantum Dynamics of the Phase in Josephson Tunnel Junctions at Millikelvin Temperatures. (talk)
A. Wallraff, A. Lukashenko, T. Duty, and A. V. Ustinov.
International Workshop on Macroscopic Quantum Coherence and Computing, Napoli, Italy, June 3 - June 7, 2002

Quantum Dynamics of the Phase in Josephson Tunnel Junctions at Millikelvin Temperatures. (talk)
A. Wallraff, A. Lukashenko, T. Duty, and A. V. Ustinov.
Heraeus Seminar on Hardware Concepts for Quantum Computing, Bad Honnef, Germany, May 12 - May 15, 2002

Quantum Dynamics of the Phase in Josephson Tunnel Junctions at Millikelvin Temperatures. (talk)
A. Wallraff, A. Lukashenko, C. Coqui, T. Duty, M. V. Fistul, and A. V. Ustinov.
Spring Meeting of the American Physical Society (APS), Indianapolis, USA, March 18 - March 22, 2002

Microwave-induced escape of a Josephson vortex from a potential well. (talk)

A. Wallraff, A. Lukashenko, C. Coqui, T. Duty, M. V. Fistul, and A. V. Ustinov.
Spring Meeting of the American Physical Society (APS), Indianapolis, USA, March 18 - March 22, 2002

Quantum Dynamics of the Phase in Josephson Tunnel Junctions at Millikelvin Temperatures. (talk)
A. Wallraff, A. Lukashenko, C. Coqui, T. Duty, M. V. Fistul, and A. V. Ustinov.
Spring Meeting of the German Physical Society (DPG), Regensburg, Germany, March 11 - March 15, 2002

Measurements of the Quantum Dynamics of Current-Biased Phase QuBits. (talk)
A. Wallraff, A. Lukashenko, C. Coqui, T. Duty, and A. V. Ustinov.
Kolloquium des DFG-Schwerpunktprogramms Quanten-Informationsverarbeitung, January 28 - January 30, 2002 Bad Honnef

Preparation and Readout of Bistable Vortex States in Heart-Shaped Long Josephson Junctions. (poster)
A. Kemp, A. Wallraff, and A. V. Ustinov.
Kolloquium des DFG-Schwerpunktprogramms Quanten-Informationsverarbeitung, January 28 - January 30, 2002 Bad Honnef

Preparation and Readout of Vortex States in Heart-shaped Josephson Junctions. (poster)
A. Kemp, A. Wallraff, and A. V. Ustinov.
SQUID 2001 Physics and Applications of Superconducting Interference, Stenungsbaden, Sweden, August 31 - September 3, 2001

Josephson Vortex Dynamics at Millikelvin Temperatures
A. Wallraff, A. Kemp, and A. V. Ustinov
Spring Meeting of the German Physical Society (DPG), Hamburg, Germany, March 26 - March 30, 2001
(abstract - conference website)

Präparation und Unterscheidung bistabiler Vortexzustände in langen geformten Josephson Kontakten
A.Kemp, A.Wallraff, A.V. Ustinov
Spring Meeting of the German Physical Society (DPG), Hamburg, Germany, March 26 - March 30, 2001
(abstract - conference website)

Metastable States of Josepshon Vortices: Thermal Processes and Quantum Effects
A. Wallraff, A. Kemp, Yu. Koval, M. Fistul and A. V. Ustinov
Spring Meeting of the American Physical Society (APS), Seattle, USA, March 12 - March 16, 2001
(abstract - conference website)

Präparation und Unterscheidung bistabiler Vortexzustände in langen geformten Josephson Kontakten
A.Kemp, A.Wallraff, A.V. Ustinov
Kryo 2000, Pommersfelden, 8. - 10. Oktober 2000
(abstract - conference website)

Thermal Activation of a Josephson Vortex from a Magnetic Field-Induced Potential Well
A. Wallraff, A. Kemp, Yu. Koval, M. Levitchev, M. V. Fistul, and A. V. Ustinov
Conference on Future Perspectives of Superconsucting Josephson Devices, Acquafredda di Maratea, Italy, 1-6 July 2000
(conference website)

Critical-current diffraction patterns for annular Josephson junctions in dependence of the direction of the field
A. Kemp, A. Wallraff, Yu. Koval, M. Levitchev, M. V. Fistul and A. V. Ustinov
Conference on Future Perspectives of Superconsucting Josephson Devices, Acquafredda di Maratea, Italy, 1-6 July 2000
(conference website)

Critical-current diffraction patterns in linear and annular Josephson junctions
A. Franz, A. Wallraff, and A. V. Ustinov
Conference on Future Perspectives of Superconsucting Josephson Devices, Acquafredda di Maratea, Italy, 1-6 July 2000
(conference website)

Thermal Activation of a Josephson Vortex from a Magnetic Field-Induced Potential Well
A. Wallraff, M. V. Fistul, A. Kemp, Yu. Koval, M. Levitchev, and A. V. Ustinov
Spring Conference of the German Physical Society (DPG), Regensburg, Germany, March 22 - March 26, 2000
(conference website)

Magnetische Flussquanten in langen Josephson-Tunnelkontakten: Fortschritte bei der Entwicklung eines makroskopischen QuBits
A. Wallraff, M. V. Fistul, A. Kemp, Yu. Koval, M. Levitchev, and A. V. Ustinov
Kolloquium des DFG-Schwerpunkt Quanten-Informationsverarbeitung, 10. Januar bis 12. Januar 2000, Bad Honnef
(conference website)

Fluxons in long Josephson junctions of sub-micron width
A. Wallraff, Yu. Koval, M. Levitchev, M. Fistul, A.V. Ustinov
LT22 Satellite Conference on Electron Transport in Mesoscopic Systems, August 12 - 15, 1999, Göteborg, Sweden
(conference website)

Observation of Whispering Gallery Resonances in Annular Josephson-Junctions
A. Wallraff, A. Franz, A.V. Ustinov, V. V. Kurin, I. A. Shereshevsky, N. K. Vdovicheva
22nd International Conference on Low Temperature Physics (LT22), August 4 - 11, 1999, Espoo and Helsinki, Finland
(conference website)

Escape of a Josephson vortex trapped in an annular Josephson junction
M. Cirillo, M. G. Castellano, M. V. Fistul, G. Torrioli,A. Wallraff, A.V. Ustinov
22nd International Conference on Low Temperature Physics (LT22), August 4 - 11, 1999, Espoo and Helsinki, Finland
(conference website)

Influence of the phase-whirling states on the fluxon motion in Josephson stacks
E. Goldobin, A. Wallraff, A. V. Ustinov
4th European Conference on Applied Superconductivity (EUCAS'99), September 14 - 17, 1999, Sitges, Spain
(conference website)

Whispering fluxons in annular Josephson junctions
A. Wallraff, A. Yulin, V.V. Kurin, A. Franz und A.V. Ustinov
Spring Conference of the German Physical Society (DPG), Münster, Germany, March 22 - March 26, 1999
(conference website)

Flußquantendynamik in ringförmigen Josephson-Tunnelkontakten mit passiver Region A. Franz, A. Wallraff und A.V. Ustinov
Spring Conference of the German Physical Society (DPG), Münster, Germany, March 22 - March 26, 1999
(conference website)

Experiments with ultranarrow long Josephson junctions
Yu. Koval, N. Thyssen, A. Wallraff, M. Fistul, A.V. Ustinov
Spring Conference of the German Physical Society (DPG), Regensburg, Germany, March 23 - March 27, 1998
(conference website)

Cherenkov Radiation from Josephson fluxons
A. V. Ustinov, E. Goldobin, G. Hechtfischer, N. Thyssen, A. Wallraff, R. Kleiner, and P. Müller
Spring Conference of the German Physical Society (DPG), Regensburg, Germany, March 23 - March 27, 1998
(conference website)

Narrow long Josephson junctions
Yu. Koval, N. Thyssen, A. Wallraff, M. Fistul, A.V. Ustinov
1998 Applied Superconductivity Conference (ASC) Palm Desert, Calironia, United States, September 13 - March 18, 1998
(conference website)

Fluxon dynamics in annular Josephson junctions under the influence of a field-induced potential
N.Thyssen, A. Wallraff, and A.V. Ustinov
Spring Conference of the German Physical Society (DPG), Münster, Germany, 1997
(conference website)

Cherenkov radiation in coupled long Josephson junctions
E. Goldobin, A. Wallraff, A.V. Ustinov, and N. Thyssen
6th International Superconductive Electronics Conference (ISEC97), Berlin, Germany, June 26-28, 1997
(conference website)

Effective length of annular long Josephson junctions with finite width: theory and experiment
A. Wallraff, V. Kurin, D. Bolkhovsky, N. Thyssen, and A. V. Ustinov
European Conference on Applied Superconductivity (EUCAS97), Twente, Netherlands, June 30 - July 3, 1997
(conference website)

Radiation Spectrum of Stacked Josephson Flux-Flow Oscillators: Numerical Simulations, Applied Superconductivity Conference 96, in Pittsburgh, USA
(conference website- abstract)