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Quantum systems far from equilibrium: From Rydberg spin models to Bose gases

Event Details

Event Dates: 

Wednesday, May 18, 2016 - 12:00pm

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Asier Pineiro Orioli

Speaker Affiliation(s): 

Institute for Theoretical Physics, University of Heidelberg
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Public Seminar

Event Details & Abstract: 

Recent progress in AMO experiments has stimulated the study of quantum manybody systems driven out of equilibrium. Using ultracold quantum gases it is possible to physically realize a large variety of Hamiltonians with widespread applications and explore their dynamics with an unprecedented degree of control and exibility. In this talk, I present two ways in which such experiments may be used to shed light on fi elds ranging from condensed matter to cosmology.

Firstly, I will discuss how experiments of ultracold Rydberg atoms can be used to mimic and study the dynamics of a quantum spin model. I will show how the ongoing experiment-theory collaboration has allowed us to take first steps towards benchmarking the experiment and has helped uncovering some of the underlying nonequilibrium processes involved.

Next I will focus on the concept of universality far from equilibrium.

To this end, the universal self-similar evolution of a nonrelativistic Bose gas and a relativistic scalar theory is studied and it is shown that both theories belong to the same universality class far from equilibrium. This opens new perspectives to learn from experiments with cold atoms aspects about the early stages of our universe.