Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 25: Quantum gases (Bosons) IV

Q 25.8: Talk

Wednesday, March 11, 2020, 12:45–13:00, e214

NOON states with ultracold bosonic gases via resonance-assisted tunneling — •Guillaume Vanhaele and Peter Schlagheck — University of Liège, Liège, Belgium

NOON states are maximally entangled many-body states that represent an important resource for quantum information processing. In the context of ultracold bosonic atoms, they can in principle be created through quantum tunneling within a two-mode system in the self-trapping regime, where an initial |N,0> state undergoes a tunneling process towards |0,N> passing via the coherent superposition |N,0> + |0,N>. However, the time scales of such tunneling processes are in general prohibitively long for typical experimental configurations and parameters. In this talk, we show that a periodic driving of this two-mode system with suitably chosen amplitudes and frequencies can give rise to a significant enhancement of this tunneling rate. We specifically focus on the mechanism of resonance-assisted tunneling which is particularly suited for this purpose, and discuss to what extent microscopic NOON states with N=5 atoms can thereby be created on experimentally realistic time scales.