SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 7: Ultra-cold Atoms, Ions and BEC I (joint session A/Q)

A 7.6: Vortrag

Montag, 6. März 2023, 18:30–18:45, F303

Quantum Simulation of Spin 1 Heisenberg Models with Dysprosium — •Katharina Brechtelsbauer and Hans-Peter Büchler — Institute for Theoretical Physics III and Center for Integrated Quantum Science and Technology, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany

In this work, we propose Dysprosium atoms for the simulation of the one-dimensional spin-1 Heisenberg model, which is known to have a rich phase diagram including the famous Haldane phase [1]. For realizing the model, we make use of the strong dipolar exchange interactions that naturally occur in the ground state of Dysprosium due to its large total angular momentum of J=8. To implement spin-1 particles, we encode the spin degree of freedom into three Zeeman sub-levels which are energetically isolated by applying a magnetic field. Using the density-matrix renormalization group, we analyze the ground-state properties of the resulting effective model. We find that a chain of fermionic Dysprosium atoms in a suitable magnetic field can form a Haldane state with the characteristic spin-1/2 edge modes. Furthermore, we discuss the use of AC Stark shifts and Raman-type schemes to isolate effective spin-1 systems and to increase the tunability of the model parameters.

[1] W. Chen, K. Hida, and B. C. Sanctuary, Phys Rev B 67, 104401 (2003)