Seminare


Seminare

In unregelmäßigen Abständen finden am MPQ Seminare statt. Diese werden von den Wissenschaftlern der einzelnen Abteilungen organisiert.

Der Veranstaltungsort wird mit dem jeweiligen Seminar bekannt gegeben.

Gastgeber: MPQ, Theory Division, hosted by Dr. Richard Schmidt

An effective description of Ramsey tunnel-coupled 1D Bose gases with the Pokrovsky-Talapov model (Valentin Kasper)

An effective description of Ramsey tunnel-coupled 1D Bose gases with the Pokrovsky-Talapov model
The high flexibility of ultracold atoms allows for the design, control and thorough investigation of quantum matter. In this work we consider two one-dimensional Ramsey tunnel-coupled Bose gases and elaborate on its relation to the Prokrovsky-Talapov model. Further, we study the ground state with variational wave-functions and explore the experimental relevant finite system size effects. Finally, we discuss possible quench protocols in order to study the non-equilibrium evolution of the Pokrovsky-Talapov model and predict experimental relevant quantities such as the phase and the density. [mehr]

Quantum physics with compound atom-ion systems (Dr. Antonio Negretti)

Quantum physics with compound atom-ion systems
In this talk I shall illustrate how ultracold quantum systems of atoms and ions can be used for quantum simulation and information processing as well as for investigating many-body quantum physics. I shall thus present a few theoretical examples on how to control an atomic bosonic Josephson junction with a single trapped ion, the formation of molecular ions, and how to engineer long-ranged atom-ion interactions with laser fields and Rydberg excitations. [mehr]

Quantum anomaly and transport in the 2D Fermi gas

Quantum anomaly and transport in the 2D Fermi gas
A scale invariant system looks similar on different length scales. Usually this is realized only after some fine tuning, for instance near a phase transition or a scattering resonance. Remarkably, a classical gas in two dimensions is scale invariant for an arbitrary strength of contact interaction. This has striking consequences for its nonequilibrium scaling dynamics, in particular the breathing motion in a harmonic trapping potential. [mehr]
We consider two-dimensional weakly-bound heterospecies molecules formed in a Fermi-Bose mixture with attractive Fermi-Bose and repulsive Bose-Bose interactions. [mehr]
From quark and nuclear matter down to solid-state systems and ultracold gases, mass asymmetry is known to profoundly influence the behavior of strongly interacting mixtures of fermionic particles, both at the few- and many-body level. [mehr]
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