# A robust boson dispenser: Quantum state preparation in interacting many-particle systems

## TL;DR

This paper introduces a method for high-fidelity quantum state control in interacting many-particle systems using spatial adiabatic passage, enabling precise particle separation in experimental traps.

## Contribution

It develops a technique to engineer trap energies for isolating a specific eigenstate, facilitating accurate quantum state preparation in interacting particle systems.

## Key findings

- Achieves near-perfect fidelity in controlling particle states.
- Demonstrates implementation feasibility with realistic parameters.
- Provides a new approach for quantum state manipulation in many-body systems.

## Abstract

We present a technique to control the spatial state of a small cloud of interacting particles at low temperatures with almost perfect fidelity using spatial adiabatic passage. To achieve this, the resonant trap energies of the system are engineered in such a way that a single, well-defined eigenstate connects the initial and desired states and is isolated from the rest of the spectrum. We apply this procedure to the task of separating a well-defined number of particles from an initial cloud and show that it can be implemented in radio-frequency traps using experimentally realistic parameters.