past events

Thursday 03. May 2018

MPL Distinguished Lecturer Series
Quantum Internet: Vision or Fiction


Talk by: Prof. Gerhard Rempe (Max Planck Institute of Quantum Optics, Garching)

Place: MPL, Seminar room 1.500


Quantum physics allows for applications not possible within classical physics. A prominent example is the quantum computer that, once realized, needs a quantum environment for communication – a quantum internet. The talk will discuss elementary steps with novel protocols towards quantum computation and quantum communication by means of single photons that propagate between quantum memories made of single atoms in optical resonators.


Wednesday 02. May 2018

IMPRS monthly meeting


Organisation: Jonas Hammer (MPL/ Russell Division)

Talk: Reconfigurable optical implementation of quantum complex networks

Speaker: Prof. Valentina Parigi (Laboratoire Kastler Brossel, Paris)

Place: MPL / library 2.500


We propose an experimental procedure for the optical implementation of quantum complex networks [1]. The implementation of collections of systems arranged in a network structure with arbitrary complex topologies is still a non-trivial task in quantum experiments. We devise a mapping between complex networks and non-linear optical processes pumped by optical frequency combs followed by mode-selective detection. We show the deterministic implementation of reconfigurable networks. The platform has the potential to enable the experimental study of, e.g., the dynamics of quantum states in complex networks and topological effects in quantum communication or information protocols over complex entanglement networks.

[1] J. Nokkala, F. Arzani, F. Galve, R. Zambrini, S. Maniscalco, J. Piilo, N. Treps, and V. Parigi, New Journal of Physics (2018)

Thursday 19. April 2018

Microfabrication technologies for biological and biophysical applications


Organisation: Max Planck Institute for the Science of Light / Sandoghdar Division

Speaker: Dr. Salvatore Girardo (TU Dresden, Microstructure Facility)

Place: MPL / library (2.500)


The development of microfabrication technologies, initially used for the fabrication of electronic circuits, has become a major focus among biological sciences, leading to the development of various miniaturized devices able to reproduce physiological environments for the in vitro study of biological systems. The usefulness of microfabricated tools for probing biological systems at different length scales (from molecular to organism scale) has been widely demonstrated, and their integration with biophysical instruments provides scientist with powerful technologies to deal with specific biological questions. During my talk, I will showcase the capabilities of our Microstructure Facility, where different materials and technologies are employed to realize microstructures and microfluidic devices which are rationally designed for specific biological and biophysical applications.



Wednesday 18. April 2018

Fabrication of perfect ultra-long fiber Bragg gratings for high-performance Raman fiber lasers


Organisation: Max Planck Institute for the Science of Light / Russell Division

Speaker: Sébastien Loranger, Ph. D. (Advanced Photonic Concept Laboratory, Ecole Polytechnique de Montréal, Canada)

Place: MPL / seminar room (1.500)


Distributed feedback (DFB) fiber laser constructed around a phase-shifted fiber Bragg grating (FBG) can achieve outstanding performance in terms of single-frequency operation with linewidth in the kHz range. Using Raman gain as pumping mechanism allows such laser to be operated in any band, including those where rare-earth cannot reach. However, due to the low Raman gain, ultra-long FBGs in highly non-linear small-core fiber must be fabricated for operation at modest pump powers (~ 1 W or less). Such gratings were, until recently, impossible to fabricate with reproducibility due to non-uniformity in specialty fibers. Ultra-long FBGs are typically defined as gratings of lengths longer than typical phase mask, hence >20 cm long. We have recently demonstrated a technique which involves a fiber characterization prior to fabrication, and thus allows for the inscription of perfect ultra-long FBGs in any imperfect fiber. The technique will be presented as well as its results. This fabrication technique has allowed for the extensive study and optimisation of Raman DFB fiber laser. The limitations (mostly thermal gradient along the fiber) were identified and understood and outstanding performance was demonstrated (350 mW pump threshold).

Friday 13. April 2018

Controlled chemical reactions with cold ions


Organisation: Max Planck Institute for the Science of Light / Leuchs Division

Speaker: Amir Mohammadi (Institut für Quantenmaterie, Universität Ulm)

Place: MPL / library (2.500)


Cold trapped ions are considered as quantum simulators that give a better understanding of the quantum world. From investigating the coherence of a quantum system to the entanglement to using as a quantum bit to make controlled chemical reactions at the level of a single particle are a wide range of applications of cold ions. In last few years, by combining the cold ions with ultracold atoms, a novel field has been created which study the reactions of atom-like particles at very low temperatures. In this talk, I present recent achievements in creating cold molecular ions by controlling the reaction parameters associated with the atom-ion system.

Monday 09. April 2018

IMPRS soft skill course
Project Management


Place: Light Lounge (third floor) at MPL

Time frame:

  • Monday April 9th from 9:00 a.m. until 6 p.m.
  • Tuesday April 10th from 8:00 a.m. until 12:30 p.m.

Coach: Rüdiger Herbst (ChallengeLearning)

Participants: Have already registered

More information:

The four phases of a project will be gradually developed and applied based on learning units, practical exercises and work on own projects. Thus the participant will gain a basic understanding of the work in a project, of the individual phases and which points are of major importance to work in a project. Reference will be made to different project management methods and with that it will be ensured that the individual tools can be used in different types of projects at the right places.


  • Project management overview
  • 4 phases of project management (main issues)

    • Initialization (project clarification, goals, project charter)
    • Planning (project structure planning, project procedure planning, risk management, resource management)
    • Realization (project controlling, change request management)
    • Closure (lessons learned)

  • Meetings and communication within a project


  • To provide basic knowledge of project management - What to do and when?
  • Getting to know the important tools of project management - Which tool do I use when?
  • Learning and basic understanding of different project management methods - Where does project management take place and how does that fit to the basics?
Thursday 29. March 2018

IMPRS monthly meeting


Organisation: Ramin Beravat (MPL/ Russell Division)

What: Talk about "How to find a job" by Ramin

Where: MPL, Library (room 2.500, 2nd floor)

Friday 23. March 2018

Dissipation of multi-partite systems under structured environments


Organisation: Max Planck Institute for the Science of Light / Genes Research Group

Speaker: Fernando Galve (Institute for Interdisciplinary Physics and Complex Systems, IFISC (CSIC-UIB))

Place: MPL / library (2.500)


We first review the transition of collective to separate (or local) dissipation in multi-partite systems under structured environments. Introducing a microscopic model of environment such as a periodic lattice, the transition is seen to be governed by the cross-damping coefficient, which can display long-range isotropic, directional long-range (dependent on crystal symmetry axes and orientation), and short-range behaviors depending on resonance conditions, but never on the bath's correlation length. We also find a frequency cutoff dependent only on system size. Next, we translate this scenario to atoms radiatively coupled through 2D photonic crystals, showing that purely directional emission is possible from FDTD simulations. We use this behavior, together with recently introduced reflective boundaries, to show how a variety of dark states of many atoms can be built. Finally we comment on recent results where we show that purely coherent directional interactions can be designed.






Monday 12. March 2018

Squeezing vacuum with Rb atoms: quantum enhanced magnetometry and competition of spatial modes


Organisation: Max Planck Institute for the Science of Light / Leuchs Division

Speaker: Prof.  Eugeny Mikhailov (Department of Physics College of William & Mary Williamsburg, USA)

Place: MPL / seminar room 1.500

Friday 23. February 2018

Digital electronic analysis, synthesis, and manipulation of the full optical field


Organisation: Max Planck Institute for the Science of Light / Russell Division

Speaker: Dr Peter Winzer, Director (Optical Transmission Subsystems Research, NOKIA Bell Labs, Crawford Hill, USA)

Place: MPL / seminar room 1.500


Optical communication systems have seen fundamental technological changes over the past 10 years that have completely redefined our ability to analyse, synthesize, and manipulate optical fields across all their physical dimensions: time/frequency, quadrature, polarization, and spatial mode content. State-of-the-art optical capabilities include stable low-linewidth lasers, programmable GHz-resolution optical filters, and spatial light modulators. Electronics capabilities include digital coherent subsystems based on high-speed (up to 100-GHz) analog-to-digital and digital-to-analog converters, and digital electronic signal processors based on Field Programmable Gate Arrays that can handle a Tbit/s of real-time data. These capabilities are about to fundamentally blur the boundaries between optical and electronic signal processing, asking for a combined view on optics and high-speed digital electronics in the analysis, synthesis, and manipulation of the full optical field, and enabling radically new opportunities across a wide range of photonics disciplines. After reviewing modern digital coherent detection and space-division multiplexing using multiple-input-multiple-output (MIMO) processing to scale fiber-optic network capacities, with new levels of physical-layer security as a by-product, we will take a glimpse at the vast possibilities enabled by fully digital light manipulation outside of telecom, from optical coherence tomography to endoscopic imaging to arbitrarily nonlinear and time-variant interferometry to ultra-fast optical tweezers.