2014

• "Second quantization"
  Two lectures given at the 5th International Summer School Modern Computational Science: Quantum Computational Chemistry
  University of Oldenburg, August 25 - September 5, 2014.

• Floquet condensates
  Lecture given at the 2014 TAMU-Princeton Summer School on Quantum Sciences and Engineering
  Casper College, Casper, Wyoming, July 21-25, 2014.

• Fluctuations of the order parameter of a mesoscopic Floquet condensate
  Invited talk given at the conference of the SFB 925: Light-induced dynamics and control of correlated quantum systems
  Hohwacht, June 25-27, 2014.

• Macroscopic wave functions without spontaneous symmetry breaking
  Invited talk given in the colloquium series "Optik und Kondensierte Materie" at the University of Bonn,
  May 20, 2014.

2013

• Quantum many-body dynamics beyond the mean-field level
  Invited talk given at the workshop of the SFB/Transregio 21: Control of quantum correlations in tailored matter:
  Common perspectives of mesoscopic systems and quantum gases
  Schloss Reisensburg, Günzburg, October 27-30, 2013.

2012

• "Dressed matter waves": Concepts and perspectives
  Invited talk given at the 514. WE-Heraeus-Seminar: "Quo vadis BEC? (IV)",
  Bad Honnef, August 21-25, 2012.

• "Dressed matter waves": Konzepte, Perspektiven und offene Fragen
  Colloquium given at the University of Tübingen,
  June 11, 2012.

2011

• Nahfeld-Raster-Wärmemikroskopie: Fakten und Visionen
  Colloquium given at the University of Paderborn,
  July 14, 2011.

• Shaken, not stirred: Ultracold atoms in strongly forced optical lattices
  Theory Colloquium given at the Technical University Darmstadt,
  April 18, 2011.

• Shaken, not stirred: Ultracold atoms in strongly forced optical lattices
  Condensed Matter Theory Seminar given at the Goethe University Frankfurt a.M.,
  January 14, 2011.

2010

• Attempts of coherent control with ultracold atoms in optical lattices
  and
  BECs and quantum chaos: A guide to numerical experiments
  Lectures given at the International Summer School "Quo vadis Bose-Einstein condensation?",
  MPIPKS Dresden, August 2 - 13, 2010.

• Thermal near fields: Facts and visions
  Invited talk given at the conference "Perspectives in physics of complex systems",
  Marburg, May 28 - 29, 2010.

• Shaken, not stirred: Bose-Einstein condensates under time-periodic forcing
  Colloquium given at the Jacobs University Bremen,
  February 10, 2010.

• Bose-Einstein-Kondensate unter zeitperiodischem Antrieb: Von kohärenter Kontrolle zu neuen Quasiteilchen
  Colloquium given at the University of Bayreuth,
  January 26, 2010.

2009

• Amplitude-controlled BEC tunneling
  Invited talk given at the international workshop on "Tunneling and scattering in complex systems - From single to many particle physics",
  MPIPKS Dresden, September 14 - 18, 2009.

• Many-body tunneling of a forced BEC I - III
  Invited series of three lectures given at the summer school on "Tunneling and scattering in complex systems - From single to many particle physics",
  MPIPKS Dresden, September 7 - 11, 2009.

• Avoided-level-crossing spectroscopy with dressed matter waves
  Invited talk given at the international workshop on "Bloch oscillations and Landau-Zener tunneling: From hot electrons to ultracold atoms",
  MPIPKS Dresden, May 4 - 8, 2009.

• The whys and hows of Bloch-Zener dynamics I - IV
  Invited series of four lectures given at the international seminar on "Bloch oscillations and Landau-Zener tunneling: From hot electrons to ultracold atoms",
  MPIPKS Dresden, April 14 - 30, 2009.

• Welle UND Teilchen: Was heißt das eigentlich?
  Contribution to the series "Physics in the City" on the occasion of the "Stadt der Wissenschaft 2009",
  Oldenburg, March 5, 2009.

2008

• Near-field scanning thermal microscopy: The Oldenburg project
  Invited talk given at the "International discussion meeting on Metamaterials and their Applications: MetaIn - 2008",
  University of Hyderabad (India), December 18 - 20, 2008.

• Near-field scanning thermal microscopy
  Colloquium given at the MPIPKS Dresden,
  December 8, 2008.

• Cold atoms in shaken optical lattices: From quasienergy bands to "dressed matter waves"
  Invited talk given at the University of Vienna,
  October 20, 2008.

• Nahfeld-Raster-Wärmemikroskopie
  Seminar given at the Technical University München,
  June 18, 2008.

• "Dressed matter waves": New common grounds between quantum optics and many-body physics?
  Seminar given at the Department of Engineering Physics, Helsinki University of Technology,
  March 6, 2008.

2007

• "Angezogene Materiewellen": Neue Entwicklungen zwischen Atom- und Festkörperphysik
  Colloquium given at the University of Bremen,
  November 1, 2007.

• Dressed matter waves
  Seminar given at the Dipartimento di Fisica, Università di Pisa,
  October 9, 2007.

• Dressed matter waves
  Invited talk given at the 395. WE-Heraeus-Seminar: "Time Dependent Phenomena in Quantum Mechanics",
  Blaubeuren, September 12-16, 2007.

• Bose-Einstein condensation of ideal and weakly interacting Bose gases
  and
  The quantum phase transition in the Bose-Hubbard model
  Lectures given at the Workshop on "Correlated Quantum Gases" of the International Research Training Group "Electron-Electron Interactions in Solids",
  University of Marburg, July 2-4, 2007.

• Kalte Atome in optischen Gittern: Heiße Trends zwischen Quantenoptik und Festkörperphysik
  Colloquium given at the University of Paderborn,
  April 19, 2007.

• Warum kann ein Flugzeug fliegen?
  Lecture given at the "Kinderuniversität" Oldenburg,
  March 21, 2007.

  This one was rather special. It was the only experimental-physics lecture I ever gave,
  and I guess I'll never get that same attention again.
  (Quelle: NWZ vom 22.03.2007 / Foto Philipp Herrnberger)

  
  

• Quantum computing: what for?
  Lecture given at the Workshop of the Bonn-Cologne Graduate School of Physics and Astronomy,
  Bad Honnef, February 9-10, 2007.

2006

• Periodically forced Bose-Einstein condensates
  Invited talk given at the 366. WE-Heraeus-Seminar: "Qubits and Macroscopic Quantum Coherence:
  From Superconducting Devices to Ultra-cold Gases",
  Bad Honnef, May 7-11, 2006.

• Kohärente Manipulation von Bose-Einstein-Kondensaten
  Colloquium given at the University of Greifswald,
  April 13, 2006.

2005

• Schütteln ersetzt Photonen - Ein Analogon zum Photon-unterstützten Tunneln bei Bose-Einstein-Kondensaten
  Seminar given at the Center of Applied Space Technology and Microgravity (ZARM) at the University of Bremen,
  December 7, 2005.

• Dynamik angetriebener Bose-Einstein-Kondensate: "Photon"-unterstütztes Tunneln und Kontrolle des Mott-Hubbard-Übergangs
  Seminar given at the University of Freiburg,
  June 8, 2005.

• Quantencomputer - Vom qubit zur Faktorisierung grosser Zahlen
  Lecture given at the "Schnupperstudium",
  Oldenburg, March 31, 2005.

• Von Einstein zum Quantencomputer
  "Ringvorlesung" at the Institute for Philosophy,
  Oldenburg, January 10, 2005.

2004

• Atome und Elektronen im Gleichtakt - Konzepte der modernen Physik
  Lecture given at the "Tag der Physik",
  Oldenburg, November 3, 2004.

• Coherent control of the tunneling effect between two coupled Bose-Einstein condensates
  Seminar given at the University of Heidelberg,
  May 26, 2004.

• Von der Gross-Pitaevskii-Näherung zur N-Teilchen-Schrödingergleichung: Ein Modell
  Seminar given at the University Duisburg-Essen (Campus Essen),
  May 13, 2004.

• Quantencomputer - Vom qubit zur Faktorisierung grosser Zahlen
  Lecture given at the "Schnupperstudium",
  Oldenburg, March 29, 2004.

• Der Ramsauer-Effekt - Experiment und Deutung
  Talk given at the occasion of the 125th birthday of the physicist Carl Ramsauer,
  Oldenburg, February 7, 2004.

2003

• Coherent control of the tunneling effect between two coupled Bose-Einstein condensates
  Seminar given at the Free University of Berlin,
  November 17, 2003.

• Bose-Einstein condensates in optical lattices: Beyond the mean-field approximation
  Invited talk given at the "International Workshop on Classical and Quantum Barrier Transport in Complex Systems",
  MPIPKS Dresden, May 20 - 24, 2003.

2002

• Quantum Mechanical Concepts of Computation
  Invited talk given at a "Workshop on Quantum Computers", Academy of Computer Science and Management,
  Bielsko-Biala (Poland), October 2, 2002.

• Coherent control of tunneling: From semiconductor nanostructures to Bose-Einstein condensates
  Seminar given at the Steacie Institute for Molecular Sciences of the National Research Council,
  Ottawa (Canada), September 13, 2002.

• Kohärente Kontrolle des Tunneleffektes zwischen gekoppelten Bose-Einstein-Kondensaten
  Invited talk given at the University of Freiburg,
  July 17, 2002.

• The Zener-breakdown revisited
  Kolloquium given at the Max-Planck-Institut für Strömungsforschung,
  Göttingen, May 30, 2002.

• Fluktuationen von Bose-Einstein-Kondensaten und Paarwechselwirkung in engen Oszillatorfallen
  Contribution to the "Gittertag" of the DFG-Schwerpunkt "Wechselwirkung in ultrakalten Atom- und Molekülgasen",
  University of Stuttgart, February 28, 2002.

• Canonical statistics of occupation numbers for ideal and weakly interacting Bose-Einstein condensates
  Invited talk given at the School on "Dynamics and Thermodynamics of Systems with Long-Range Interactions",
  Les Houches (France), February 18 - 22, 2002.

• Quantencomputer - Visionen und Wirklichkeit
  Lecture given at the "Tag der Physik",
  Oldenburg, February 6, 2002.

• Controlling population transfer in heterostructures by THz radiation
  Invited talk given at a "Workshop on Quantum Heterostructures and THz Electronics",
  University of Regensburg, January 17, 2002.

2001

• Kohärente Kontrolle des Tunneleffektes zwischen gekoppelten Bose-Einstein-Kondensaten
  Invited talk given at the 2. Dresdner Herbstseminar des Arbeitskreises Nichtlineare Physik on "Mathematische Methoden für nichtlineare Systeme",
  MPIPKS Dresden, November 4 - 7, 2001.

• Coherent control of the tunneling effect between two Bose-Einstein condensates
  Invited talk given at the European Research Conference on "Quantum Optics",
  San Feliu de Guixols (Spain), October 6-11, 2001.

• The Zener-breakdown revisited
  Seminar given at the University of Regensburg,
  May 18, 2001.

• Steuerung von Elementarprozessen in periodischen Potentialen
  Invited talk given at the "Materialwissenschaftlicher Workshop der Universitäten Oldenburg und Bremen",
  Hanse-Wissenschaftskolleg Delmenhorst, May 11, 2001.

• Festkörperphysik auf Abwegen
  Antrittsvorlesung at the Carl von Ossietzky Universität Oldenburg,
  April 23, 2001.

• Kontrolle durch Antrieb
  Invited talk given at the Abschlusskolloquium of the DFG-Schwerpunkt "Zeitabhängige Phänomene und Methoden in Quantensystemen in der Physik und Chemie",
  Schauenburg-Elmshagen (bei Kassel), March 5-7, 2001.

• Dynamik von Bose-Einstein-Kondensaten in optischen Gittern
  Poster displayed at the Kolloquium of the DFG-Schwerpunkt "Wechselwirkung in ultrakalten Atom- und Molekülgasen",
  MPIPKS Dresden, February 28. - March 1, 2001.

2000

• Rigorose Abschätzung der Energiedissipation in turbulenten Scherströmungen
  Seminar given at the University of Oldenburg,
  November 10, 2000.

• Kohärente Kontrolle des Tunneleffektes zwischen gekoppelten Bose-Einstein-Kondensaten
  Seminar given at the Technical University München,
  October 25, 2000.

• Towards coherent manipulation of many-body dynamics
  Invited talk given at the 240. WE-Heraeus-Seminar: "Driven quantum systems",
  Tutzing, September 17-21, 2000.

• Neues vom Zener-Durchbruch
  Invited talk given at the workshop on "Quantum transport" of the DFG-Schwerpunkt "Zeitabhängige Phänomene und Methoden in Quantensystemen in der Physik und Chemie",
  Reisensburg, Günzburg, June 26-28, 2000.

• From Bose to Bloch: Solid-state physics with cold atoms
  Seminar given at the Royal Institute of Technology,
  Stockholm (Sweden), April 11, 2000.

• Schrödinger- und Gross-Pitaevskii-Dynamik kalter Atome in stehenden Lichtwellen
  Seminar given at the University of Augsburg,
  February 11, 2000.

• From Bose to Bloch: Solid-state physics with cold atoms
  Invited talk given at the "30th Winter Colloquium on the Physics of Quantum Electronics",
  Snowbird (Utah, U.S.A.), January 9-12, 2000.

1999

• Von Bose zu Bloch: Präzisionsphysik mit Bose-Einstein-Kondensaten
  Invited talk given at the University of Bremen,
  November 18, 1999.

• News on the ideal Bose gas
  Seminar given at the Quantum Institute at Rice University,
  Houston (U.S.A.), September 10, 1999.

• Between quantum optics and solid state physics: Ultracold atoms in modulated optical lattices
  Seminar given at the Dept. of Physics at Texas A&M University,
  College Station (U.S.A.), September 8, 1999.

• News on the ideal Bose gas
  Seminar given at the Dept. of Physics at Texas A&M University,
  College Station (U.S.A.), September 7, 1999.

• What can we learn from atomic de Broglie waves in optical lattices?
  Invited talk given at the Center for Advanced Study workshop on "Bloch oscillations and dynamic localization: A confluence of condensed matter physics and quantum optics",
  The University of New Mexico, Albuquerque (U.S.A.), September 3-4, 1999.

• Coherent control of localization in ac-driven superlattices
  Invited lecture given at the "Adriatico Research Conference on High Field Transport in Superlattices",
  The Abdus Salam International Centre for Theoretical Physics, Trieste (Italy), August 10-13, 1999.

• Coherent manipulation of matter waves in optical lattices
  Seminar given at the Max-Planck-Institute for Quantum Optics,
  Garching bei München, Juli 6, 1999.

• Kohärente Kontrolle quantenmechanischer Lokalisierung
  Seminar given at the University of München,
  June 1, 1999.

• Strenge Abschätzung der Energiedissipation in turbulenten Scherströmungen
  Seminar given at the University of München,
  May 12, 1999.

• Von der Bose-Einstein-Kondensation zum Atomlaser
  Invited talk given at the University of Oldenburg,
  May 7, 1999.

• Strenge Abschätzung der Energiedissipation in turbulenten Scherströmungen
  Invited talk given at the University of Stuttgart,
  April 30, 1999.

• Superadiabatic quantum dynamics in short laser pulses
  Poster displayed at the Kolloquium of the DFG-Schwerpunkt "Zeitabhängige Phänomene und Methoden in Quantensystemen in der Physik und Chemie",
  Würzburg, March 8-9, 1999.

• Kohärente Kontrolle quantenmechanischer Lokalisierung
  Invited talk given at the University of Saarbrücken,
  January 21, 1999.

1998

• Universal renormalization of Bose-type saddle-point integrals
  Seminar given at the Royal Institute of Technology,
  Stockholm (Sweden), December 4, 1998.

• Strenge Abschätzung der Energiedissipation in turbulenten Scherströmungen
  Invited talk given at the Technical University of Chemnitz,
  November 26, 1998.

• Das ideale Bosegas in der kanonischen und mikrokanonischen Gesamtheit
  Seminar given at the University of Heidelberg,
  July 16, 1998.

• Can we rely on grand canonical statistics?
  Invited talk given at the meeting of the DFG-Forschergruppe "Quantengase" of the Universities of Ulm and Konstanz,
  Insel Reichenau, June 22-24, 1998.

• Coherent control of quantum localization
  Invited talk given at the "International Workshop on Coherent Control of Charge Carrier Dynamics in Semiconductors",
  The University of Illinois at Chicago (U.S.A.), May 20-22, 1998.

• Zwischen Quantenoptik und Festkörperphysik: Lokalisierungskontrolle durch periodischen Antrieb
  Gustav-Hertz price lecture given at the DPG Frühjahrstagung,
  Regensburg, March 25, 1998.

• Adiabatic and non-adiabatic aspects of population transfer: Landau-Zener transitions and STIRAP
  Poster displayed at the Kolloquium of the DFG-Schwerpunkt "Zeitabhängige Phänomene und Methoden in Quantensystemen in der Physik und Chemie",
  Würzburg, March 2-4, 1998.

• Semiconductor superlattices and optical lattices with time-periodic forcing
  Invited talk given at the Research Workshop of the Israel Science Foundation on "Photo-Induced Nonlinear Dynamics in Strong Laser Fields",
  Israel Institute of Technology, Haifa (Israel), February 22-27, 1998.

• From number theory to Bose-Einstein condensation
  Invited talk given at the 186. WE-Heraeus-Seminar: "Statistical Mechanics, Nonlinear Dynamics, and Turbulence",
  Marburg, February 9-11, 1998.

• Ein (mikro-)kanonischer Zugang zum idealen Bose-Gas
  Seminar given at the University of Bonn,
  January 19, 1998.

1997

• Lokalisierung in angetriebenen tight-binding-Gittern
  Seminar given at the University of Augsburg,
  November 28, 1997.

• From number theory to statistical mechanics
  Invited talk given at the University of Potsdam,
  November 12, 1997.

• ac-controlled Anderson localization
  Invited talk given at the 184. WE-Heraeus-Seminar: "AC and time-dependent quantum transport",
  Bad Honnef, October 20-24, 1997.

• From number theory to statistical mechanics: microcanonical analysis of the harmonically trapped Bose gas
  Invited talk given at the European Research Conference on "Bose-Einstein Condensation",
  Il Ciocco (Italy), July 12-17, 1997.

• Kontrolle von Lokalisierung in periodisch angetriebenen Gittern
  Invited talk given at the University of Hamburg,
  June 27, 1997.

• Kontrolle von Quantensystemen durch Laserstrahlung
  Poster displayed at the Kolloquium of the DFG-Schwerpunkt "Zeitabhängige Phänomene und Methoden in Quantensystemen in der Physik und Chemie",
  Würzburg, March 10-11, 1997.

• Kontrolle von Lokalisierungseffekten in periodisch angetriebenen Gitterstrukturen
  Invited talk given at the University of Oldenburg,
  February 14, 1997.

1996

• Ultrakalte Atome in modulierten stehenden Lichtwellen
  Seminar given at the University of Ulm,
  November 28, 1996.

• Der Quantencomputer: Vision und Wirklichkeit
  Habilitationsvortrag delivered at the University of Marburg,
  November 20, 1996.

• Ultrakalte Atome in modulierten stehenden Lichtwellen
  Invited talk given at the University of Hannover,
  October 22, 1996.

• Transitions in periodically driven systems: the classical-quantum correspondence
  Seminar given at the Research Institute for Theoretical Physics,
  Helsinki (Finland), October 1, 1996.

• Localization effects in ac-driven tight-binding (super-)lattices
  Seminar given at the University of München,
  July 29, 1996.

• Bose-Einstein Kondensation in Fallen: Was ist neu?
  Seminar given at the University of Konstanz,
  May 23, 1996.

• Lokalisierungseffekte in periodisch angetriebenen Gitterstrukturen
  Poster displayed at the 1996 Kolloquium of the DFG-Schwerpunkt "Zeitabhängige Phänomene und Methoden in Quantensystemen in der Physik und Chemie",
  Bleibach (bei Freiburg), February 26-27, 1996.

• "Renormierung" atomarer g-Faktoren und kontrollierte Anderson-Lokalisierung in hochfrequenten Feldern
  Seminar given at the University of Regensburg,
  January 18, 1996.

• "Renormierung" atomarer g-Faktoren und kontrollierte Anderson-Lokalisierung in Wechselfeldern
  Seminar given at the University of Freiburg,
  January 11, 1996.

1995

• Das Floquet-Bild: Grundlagen und Anwendungen
  Invited talk given at the meeting of the Graduiertenkolleg "Wechselwirkung von Strahlung mit Materie" (University of Kaiserslautern and University of Hannover),
  Valbert (bei Meinerzhagen), September 27-29, 1995.

• "Simple" quantum systems in time-periodic fields
  and
  Tunneling and localization in ac-biased tight-binding systems
  Invited lectures given at the NORDITA workshop "Dynamics of Simple Quantum Systems: Molecules and Heterostructures",
  Sandbjerg Manor (Denmark), May 11-17, 1995.

• Zur klassisch-quantenmechanischen Korrespondenz bei zeitabhängigen Prozessen
  Seminar given at the University of Stuttgart,
  May 2, 1995.

• Hamiltonsche Mechanik und das Korrespondenzprinzip in der Laserchemie
  Invited talk given at the DPG Frühjahrstagung,
  Berlin, March 20-24, 1995.

• Aktive Kontrolle kleiner Moleküle durch kurze, starke Laserpulse
  Talk given at the 1995 Kolloquium of the DFG-Schwerpunkt "Zeitabhängige Phänomene und Methoden in Quantensystemen in der Physik und Chemie",
  University of Kaiserslautern, February 20-21, 1995.

1994

• Gezielte Manipulation von Quantensystemen: Möglichkeiten und offene Fragen
  Seminar given at the University of Kaiserslautern,
  December 9, 1994.

• Neue Mikrowellenexperimente an hochangeregten Atomen und ihre Deutung
  Talk given at the meeting of the SFB 185 "Nichtlineare Dynamik",
  Frankfurt, October 10, 1994.

• Lattices in strong ac fields: problems and applications
  Poster displayed at the "International Symposium on Chaos and Mesoscopic Systems",
  Max-Planck-Institut für Physik komplexer Systeme, Dresden, June 7-10, 1994.

• Optimierung selektiver Laserpulse: Verallgemeinerte pi-Pulse
  Invited talk given at the Abschlusskolloquium of the DFG-Schwerpunkt "Atom- und Molekültheorie",
  Bleibach (bei Freiburg), May 5-6, 1994.

Some invited talks prior to 1994

• Strongly driven semiconductor quantum wells: new testing ground for "quantum chaos"?
  Invited talk given at the Yukawa International Seminar "Quantum and Chaos: How Incompatible?"
  Kansai Seminar House, Kyoto (Japan), August 24-28, 1993.

• Miniband collapse in the presence of intense FIR electric fields
  Invited talk given at the "Symposium on Superlattices in Electric Fields",
  March Meeting of the American Physical Society, Seattle, Washington (U.S.A.), March 22-26, 1993.

• Design and Floquet analysis of optimal laser pulses for molecular excitations and isomerizations
  Invited talk given at the "Symposium on Coherent Control of Molecular Systems",
  Meeting of the American Chemical Society, Washington, D.C. (U.S.A.), August 24-28, 1992.

• Controlling excitation and tunneling by optimally shaped laser pulses
  Invited talk given at the "Workshop on the Control of Molecular Systems",
  The Fields Institute for Research in Mathematical Sciences, Waterloo, Ontario (Canada), May 31 - June 4, 1992.

• Adiabatic evolution, quantum phases, and Landau-Zener transitions in strong radiation fields
  Invited talk given at the "International Conference on Coherent Radiation Processes in Strong Fields",
  The Catholic University, Washington, D.C. (U.S.A.), June 18-22, 1990.