Poster Session

Poster Session I (4pm-6pm CDT)

4:00 pm – 6:00 pm, Tuesday June 4 // Session D00

Topics:

Polarons and bi-polarons in strongly interacting 1D Bose gases

Poster 105

Presenter: Dennis Breu (University of Kaiserslautern)

Authors: Martin Will (University of Kaiserslautern Landau), Michael Fleischhauer (University of Kaiserslautern-Landau)

We study the ground state, dynamics and effective interactions of quantum impurities immersed in a strongly interacting 1D-Bose gas using Tensor Network simulations. This algorithm makes it possible to theoretically probe Bose polarons in the regime of strong bose-bose interactions for the entire range of the Tonks parameter γ.

We calculate the polaron binding energies as well as the Born-Oppenheimer interaction potentials of two polarons as well as bi-polaron bound state energies and wave functions and compare them with analytical predictions in the weak and strong coupling regimes.

Additionally, we investigate the dynamics of a single finite-mass impurity in a 1D Bose gas in a box potential. We observe a transition between a delocalized impurity and an impurity localized at the system boundaries, as a function of impurity-boson interaction strength. By making use of approximations for the energy of both localized and delocalized states we give analytical predictions for this crossover.

Finally, we use time-evolving block decimation (TEBD) to study the dynamics of impurities accelerated by constant forces in a strongly interacting 1D Bose gas were we find a behavior that resembles Bloch oscillations.

Funding acknowledgement

The authors gratefully acknowledge financial support from the DFG through SFB TR 185, project number 277625399.

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