Many Body Seminar: Simulation of quantum field theory with one-dimensional Bose-Einstein condensates

Amin Tajik (TU Vienna)
Ultra cold atoms in atom chips are one of the most practical platforms for realising one-dimensional (1D) quantum gases, which have cleared the path for extensive experimental exploration of interesting models in quantum field theory (QFT) ranging from the Luttinger liquids to the quantum sine-Gordon.

Amin Tajik (TU Vienna)
Group Seminar via Zoom
Thu 24. June 2021, 11:00 am (MEZ)

Abstract*:

Ultra cold atoms in atom chips are one of the most practical platforms for realising one-dimensional (1D) quantum gases, which have cleared the path for extensive experimental exploration of interesting models in quantum field theory (QFT) ranging from the Luttinger liquids to the quantum sine-Gordon. By superposing optical dipole traps with the state of the art magnetic confinement we are able to engineer strong and highly tunable 1D potentials. A quasi-Bose-Einstein condensate (q-BEC) trapped into such geometry is effectively described by QFT and using the Josephson tunneling between two q-BECs we can introduce and control the coupling.

In this talk, I will first explain how 1D q-BECs are realised and probed in our atom chip experiments. Then, I will discuss the emergence of the effective field theoretical description. Finally, I will present the measurements of dynamical correlation functions after a quantum quench in the sine-Gordon model.


*Important: This time we begin directly with the talk at 11h and we're skipping our usual informal discussion in the begining.*

If you'd like to participate in the seminar, please contact us!