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Q: Fachverband Quantenoptik und Photonik

Q 37: Ultra-cold Atoms, Ions and BEC II (joint session A/Q)

Q 37.6: Talk

Wednesday, March 4, 2026, 16:00–16:15, N 1

Generation of Laughlin states of ultracold atoms exploiting coherent driving — •Alberto Tabarelli de Fatis¹, Iacopo Carusotto¹, Christof Weitenberg², Alexander Schnell³, and André Eckardt³ — ¹Pitaevskii BEC Center, CNR-INO and Dipartimento di Fisica, Universitá di Trento, Trento, Italy — ²Department of Physics, TU Dortmund University, 44227 Dortmund, Germany — ³Institut für Physik und Astronomie, Technische Universität Berlin, Berlin, Germany.

Realizing fractional quantum Hall (FQH) states in a well-controlled environment such as neutral ultracold atoms, has proven extremely challenging, restricting experiments to a very small number of particles N=2,3.

I present a proposal to generate Laughlin states in an FQH system coupled to a BEC reservoir via an angular-momentum-selective coherent pump. By adiabatically varying the strength and detuning of the pump, vacuum is converted into a Laughlin state, without changing the system Hamiltonian, and avoiding gap closing associated with the topological phase transition. This scheme allows the generation of quite large (of order N=10) Laughlin states with excellent fidelity, as well as quasihole excitations on top of it, without fine-tuning of the driving parameters, and with reasonable preparation times.

An experimental realization of our proposal will open new perspectives in the use of ultracold atoms as quantum simulators of condensed matter systems and its extension to non-Abelian states will provide a powerful platform for topological quantum computing.

Keywords: Quantum SImulation; Fractional Quantum Hall; Synthetic gauge fields