ansprechpartner

Dr. Stephan Dürr
Stephan Dürr
Gruppenleiter
Telefon: +49 89 3 29 05 - 291
Prof. Dr. Thomas Udem
Thomas Udem
Wissenschaftler
Telefon: +49 89 3 29 05 - 282 // -257




kommende Kolloquien

Kolloquien

Kolloquien

Die Gastvorträge im Rahmen des MPQ-Kolloquiums finden von April bis Juli sowie von Oktober bis Januar jeweils dienstags um 14:30 Uhr statt.

Achtung! Ab Oktober 2017 finden die Vorträge, aufgrund der Bauarbeiten, vorübergehend im Interims-Hörsaal, Raum B 0.32 am Max-Planck-Instituts für Quantenoptik statt.

Ansprechpartner für die wissenschaftliche Organisation:

Dr. Stephan Dürr und Dr. Thomas Udem

Wenn Sie einen Vortrag im Livestream verfolgen möchten, ist es nötig, dass Sie sich in eine entsprechende Mailing Liste eintragen. Daraufhin erhalten Sie Instruktionen zum Empfang des Livestreams.

Monat:

"The two-dimensional Bose gas: Thermodynamics and beyond"

A two-dimensional Bose fluid is a remarkably rich many-body system, which allows one to revisit several features of quantum statistical physics. Firstly, the role of thermal fluctuations is enhanced compared to the 3D case, which destroys the ordered state associated with Bose–Einstein condensation. However interactions between particles can still cause a superfluid transition, thanks to the Berezinskii–Kosterlitz–Thouless mechanism. Secondly, the weakly interacting Bose gas in 2D must be scale-invariant, a remarkable feature that manifests itself in the very simple form taken by the equation of state of the fluid. In this talk I will summarize the recent experimental progress in the investigation of 2d atomic gases, and draw some comparisons with other planar fluids such as exciton-polariton gases, which also provide spectacular illustrations of low dimensional many-body physics. [mehr]

"The two-dimensional Bose gas: Thermodynamics and beyond"

A two-dimensional Bose fluid is a remarkably rich many-body system, which allows one to revisit several features of quantum statistical physics. Firstly, the role of thermal fluctuations is enhanced compared to the 3D case, which destroys the ordered state associated with Bose–Einstein condensation. However interactions between particles can still cause a superfluid transition, thanks to the Berezinskii–Kosterlitz–Thouless mechanism. Secondly, the weakly interacting Bose gas in 2D must be scale-invariant, a remarkable feature that manifests itself in the very simple form taken by the equation of state of the fluid. In this talk I will summarize the recent experimental progress in the investigation of 2d atomic gases, and draw some comparisons with other planar fluids such as exciton-polariton gases, which also provide spectacular illustrations of low dimensional many-body physics. [mehr]

"Molecular Sciences: The Dynamical Perspective."

Ultrafast laser science has led to significant progress in molecular dynamics studies, particularly for the difficult but general case of non-Born-Oppenheimer dynamics. Quantum control methods further enhance molecular dynamics studies by permitting direct Molecular Frame measurements. As laser fields get stronger, a sub-cycle (attosecond) physics emerges, leading to new probes of driven multi-electron dynamics in polyatomic molecules. In condensed phases, ultrafast lasers permit the ‘triggered’ unzipping of double helix DNA, potentially leading to ‘light-induced genomics’, as well as simplified approaches to label-free CARS microscopy of live cells and tissues. [mehr]

"Quantum Experiments with Massive Mechanical Objects: Pushing the Frontiers of Quantum Optics."

Massive mechanical objects are now becoming available as new systems for quantum science. They combine features that allow unique approaches in both quantum foundations and quantum applications. For example, their size and mass provides access to a hitherto untested parameter regime of macroscopic quantum physics. At the same time, the on-chip integrability of nano- and micromechanics, together with their flexibility to couple to different physical systems, offers a novel perspective for quantum information processing architectures.Quantum optics provides a high-precision toolbox to enter and to control the quantum regime of the motion of such mechanical devices. I will briefly highlight the recent developments and discoveries in the field. This includes our recent progress towards generating optomechanical quantum entanglement, which is at the heart of Schroedinger’s cat paradox, as well as some surprising technology spin-offs that we have encountered. I will also discuss the fascinating perspectives and challenges when pushing towards quantum experiments with truly massive mechanical objects, in particular the possibility to explore the interface between quantum physics and (quantum) gravity in table-top quantum optics experiments. [mehr]

 
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