Contact

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

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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:

Spatial entanglement patterns and Einstein-Podolsky-Rosen steering in a Bose-Einstein condensate

Spatial entanglement patterns and Einstein-Podolsky-Rosen steering in a Bose-Einstein condensate (Dr. Matteo Fadel)

Atomic Bose-Einstein condensates (BECs) are highly controllable isolated quantum systems with long coherence times, and offer applications in metrology and quantum information processing. We experimentally prepare two-component Rubidium-87 BECs, consisting of a few hundred atoms, on an atom-chip. Using state-selective potentials to tune the collisional interactions (one-axis twisting dynamics), we prepare many-particle non-classical states. After a time-of-flight expansion, high-resolution images allows us to access sub-regions of the atomic density distribution of various shapes and measure the spin correlations between them. [more]

Quantum Emitters in Non-Conventional Baths (European Research Council)

SDP relaxations for the certification of properties of many-body quantum states

SDP relaxations for the certification of properties of many-body quantum states (Flavio Baccari)

Understanding the properties of many-body systems is one of the crucial questions for the development of quantum technologies. An ubiquitous problem is to certify that a given many-body quantum system satisfies an operational property: is this given system in an entangled state? Does it contain the solution to a classical optimisation problem? [more]

Entanglement in non-unitary critical spin chains

Entanglement in non-unitary critical spin chains (Romain Couvreur)

Entanglement entropy has proven invaluable to our understanding of quantum criticality. It is natural to try to extend the concept to “nonunitary quantum mechanics”, which has seen growing interest from areas as diverse as open quantum systems, noninteracting electronic disordered systems, or nonunitary conformal field theory (CFT). [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]

 
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