upcomming seminars

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Quantum Many-Body Systems
Secretariat: Kristina Schuldt
Phone:        +49 89 3 29 05 - 138

Theory
Secretariat: Andrea Kluth
Phone:        +49 89 3 29 05 - 736

Laser Spectroscopy
Secretariat: Ingrid Hermann
Phone:        +49 89 3 29 05 - 712

Attosecond Physics
Secretariat: Corin Abert
Phone:        +49 89 3 29 05 - 612

Quantum Dynamics
Secretariat: Iris Schwaiger
Phone:        +49 89 3 29 05 - 711

Seminars 2016

seminars 2015

Seminars

Seminars

On an irregular basis various Special Seminars take place at the MPQ. The seminars are organized by scientists of our divisions, administration or staff representatives.

The location will be announced with the event.

Month:

Flat Optics: a new approach to structured light, polarization control and lenses (Prof. Federico Capasso)

Metasurfaces enable arbitrary control of the wavefront of light by locally manipulating polarization in addition to amplitude and phase. As a result, multiple optical functions can be encoded with greatly reduced complexity that be accessed by changing the input polarization, wavelength and k-vector. Unique ways to generate structured light, a new polarization optics that greatly surpasses the capabilities of the standard and a new class of lenses that correct aberrations without requiring multiple stacked lenses have emerged from this approach. [more]

A source of light-matter entanglement for quantum state distribution over hybrid matter platforms

A source of light-matter entanglement for quantum state distribution over hybrid matter platforms (Dr. Pau Farrera)

In this talk I will speak about our source of light-matter quantum states based on laser-cooled atoms. In particular, I will explain the capabilities developed in order to transfer photonic qubits from this system to another matter platform that consists on a crystal doped with rare-earth ions. Photonic qubits generated by the atomic cloud were frequency converted and temporally shaped in order to have an optimum interaction with the ions in the crystal. These capabilities enabled to perform quantum state transfer between these two very different matter systems: the laser-cooled gas and the crystal. [more]

Entanglement Renormalization for Weakly Interacting Fields

Entanglement Renormalization for Weakly Interacting Fields (Ali Mollabashi)

I will introduce a specific method how to generalize cMERA in presence of interactions. The method is based on Hamiltonian renormalization of spatial degrees of freedom. Using this method I will work out a circuit starting from an appropriate IR state and ending up with the vacuum state of phi^4 theory. [more]

Ultrafast electron control: from the particle accelerator on a chip to attosecond charge transfer in a Schottky junction

IMPRS-APS Talk: Ultrafast electron control: from the particle accelerator on a chip to attosecond charge transfer in a Schottky junction (Prof. Dr. Hommelhoff)

Firstly, I will deal with a new way of accelerating charged particles based on femtosecond laser pulses and nanophotonic structures. The concept is exactly the same as in classical RF and microwave accelerators, only with roughly five orders of magnitude faster oscillating driving fields and structures that are smaller by the same factor. With the help of such small lithographically produced dielectric structures we have demonstrated not only efficient acceleration of electrons, but also deflection and focusing. Currently, we are building a prototype "accelerator on a chip". The current status will be reported. [more]

Arrival time distributions and spin in quantum mechanics-A Bohmian perspective (Siddhant Das)

Arrival time distributions and spin in quantum mechanics-A Bohmian perspective (Siddhant Das)

The arrival time statistics of spin-1/2 particles governed by Pauli's equation, and defined by their Bohmian trajectories, show unexpected and very well articulated features. Comparison with other proposed statistics of arrival times that arise from either the usual (convective) quantum flux or from semiclassical considerations suggests testing the notable deviations in an arrival time experiment, thereby probing the predictive power of Bohmian trajectories. The suggested experiment, including the preparation of the wave functions, could be done with present-day experimental technology. [more]

 
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