Seminare

Special Seminar: "Steering quantum dynamics in molecules pumped by ultrashort optical pulses" (Prof. Francoise Remacle)

Attoworld Seminar

Datum: 27.10.2023
Uhrzeit: 10:00
Vortragende(r): Prof. Francoise Remacle
Department of Chemistry, University of Liège
Ort: Max Planck Institute of Quantum Optics
Raum: Herbert Walther Lecture Hall

Short attosecond (as) or few femtoseconds (fs) IR and UV pulses have a broad energy bandwidth which allows exciting a superposition of several electronic states in neutral molecules and molecular cations.[1] The nature of the states excited can be controlled by tuning the pulse parameters. This opens the way to novel avenues for control by engineering of electronic coherences between selected electronic states to steer charge migration on a purely electronic time scale.[2] As the nuclei begin to move, the electronic and nuclear motions are entangled and the engineered electronic coherences can be usefully exploited for directing the vibronic density through the network of non adiabatic interactions to specific products. [mehr]

"Photonic Data Science: from spatial and spectral patterns to information and knowledge”(PD Dr. Thomas Bocklitz)

Datum: 20.10.2023
Uhrzeit: 11:15
Vortragende(r): PD Dr. Thomas Bocklitz
Abbe Center of Photonics
Ort: Max Planck Institute of Quantum Optics
Raum: Herbert Walther Lecture Hall
Gastgeber: IMPRS-APS

Photonics is increasingly being used in various disciplines such as biology, medicine and diagnostics. This increase in applications is driven by improvements in experimental setups, but also by the development of data science methods in the context of photonic data. These data science methods enable the detection and extraction of biomedical information from subtle differences in biophotonic data. This information can be as diverse as predicting tissue types, disease states, or certain characteristics of organisms such as eukaryotic cells or bacteria. [mehr]

Special Seminar: Flying qubits: snowballs in Hell (Prof. Dr. Klaus Mølmer)

Monday, 05.12. at 3.30 p.m., Room B 0.32
Datum: 05.12.2022
Uhrzeit: 15:30
Vortragende(r): Prof. Dr. Klaus Mølmer
Niels Bohr Institute, University of Copenhagen
Ort: Max Planck Institute of Quantum Optics
Raum: New Lecture Hall, Room B 0.32

Scalable designs for quantum information processing make use of flying qubits, i.e., photon or phonon wave packets that can communicate quantum states and gate operations between remote material (stationary) qubits in a larger network. While a precise description of how a travelling pulse of quantum radiation interacts with a local material quantum system is a crucial theory component in quantum optics and quantum information technologies, our textbooks do not provide a formal description of this elementary interaction process. [mehr]

Integrated nonlinear optics and Inverse-designed multimode photonics

Datum: 30.09.2022
Uhrzeit: 10:00
Vortragende(r): Kiyoul Yang
Nanoscale and Quantum Photonics Lab, Stanford University, Stanford, CA, USA
Ort: Max Planck Institute of Quantum Optics
Raum: Herbert Walther Lecture Hall
Gastgeber: MPQ, Laser Spectroscopy Division

In this talk, we will discuss new opportunities involving chip-scale nonlinear optics along with inverse-designed photonic circuits for multi-dimensional information processing. As a specific example, I will introduce recent experiments where we demonstrate natively error-free terabit/s data transmission using integrated frequency combs and multimode silicon photonics. [mehr]

Special Seminar: Absolute Measurement of a THz Transition Frequency Referenced to a Magnetic Dipolar Transition in Ca+ ion

Datum: 06.09.2022
Uhrzeit: 11:00
Vortragende: Dr. Caroline Champenois
Aix-Marseille University, CNRS, Institute de Physique des Interactions Ioniques et Moléculaires, Marseille, France
Ort: Max Planck Institute of Quantum Optics
Raum: Hörsaal, Raum B 0.32 / New lecture hall, Room B 0.32
Gastgeber: MPQ, Laser Spectroscopy Division

A three-photon Coherent Population Trapping is observed by the dark line it induces on the laser induced fluorescence of a laser-cooled Ca+ ion cloud. This dark line is referenced to a magnetic dipolar transition at 1.8 THz, between two fine-structure sub-state of a metastable state. We explore the performance of such a system for frequency metrology in the THz domain. [mehr]