Title: Interaction blockade for bosons in an asymmetric double well,
Abstract: The interaction blockade phenomenon isolates the motion of a single quantum
particle within a multi-particle system, in particular for coherent
oscillations in and out of a region affected by the blockade mechanism. For
identical quantum particles with Bose statistics, the presence of the other
particles is still felt by a bosonic stimulation factor $\sqrt{N}$ that speeds
up the coherent oscillations, where $N$ is the number of bosons. Here we
propose an experiment to observe this enhancement factor with a small number of
bosonic atoms. The proposed protocol realises an asymmetric double well
potential with multiple optical tweezer laser beams. The ability to adjust bias
independently of the coherent coupling between the wells allows the potential
to be loaded with different particle numbers while maintaining the resonance
condition needed for coherent oscillations. Numerical simulations with up to
three bosons in a realistic potential generated by three optical tweezers
predict that the relevant avoided level crossing can be probed and the expected
bosonic enhancement factor observed.