# Stable production of a strongly-interacting Bose-Einstein condensate via mode-matching

## TL;DR

The paper presents a diabatic protocol for reliably producing a strongly-interacting Bose-Einstein condensate by matching density profiles through trap and scattering length modifications, enabling new studies of quantum many-body effects.

## Contribution

It introduces a novel diabatic method for creating strongly-interacting BECs that avoids issues with adiabatic or direct quenches, using mode-matching techniques.

## Key findings

- Achieves nearly unit population transfer to the strongly-interacting ground state.
- Enables investigation of beyond mean-field effects in Bose gases.
- Provides a practical protocol for experimental realization.

## Abstract

We describe a diabatic protocol to prepare a strongly-interacting Bose-Einstein condensate in a regime where neither an adiabatic ramp nor a direct diabatic quench are desirable. This protocol is expected to achieve a nearly unit population transfer to the strongly-interacting ground state for realistic experimental parameters for $^{85}$Rb. The protocol matches the initial and final density profiles by modifying the trap along with the scattering length during the quench. The protocol should reveal several properties of the strongly-interacting Bose gas, and enable further investigation of beyond mean-field corrections to the Gross-Pitaevskii equation.