# Interaction blockade for bosons in an asymmetric double well

## TL;DR

This paper proposes an experiment to observe the bosonic enhancement factor in interaction blockade phenomena using a controllable asymmetric double well potential with optical tweezers, supported by numerical simulations.

## Contribution

It introduces a novel experimental protocol for observing bosonic stimulation effects in a small number of atoms within an asymmetric double well system.

## Key findings

- Numerical simulations predict observable bosonic enhancement with up to three atoms.
- The protocol allows independent control of bias and coupling in the double well.
- The experiment can probe avoided level crossings to confirm the enhancement factor.

## 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.