Neutral-atom qubits in atom-molecular BEC

TL;DR

This paper demonstrates the realization and control of atomic qubits within atom-molecular Bose-Einstein condensates, exploring different wavefunction configurations and their dependence on photo association parameters for quantum computing applications.

Contribution

It introduces a novel implementation of atomic qubits in atom-molecular BECs with distinct wavefunction classes and analyzes their control via photo association.

Findings

Quasi-flat droplet qubits with effective isolation.

Wavefunction forms exhibit power law and sech-based behaviors.

Qubit localization depends on chemical potential and photo association.

Abstract

Recently, neutral atoms have emerged as a promising platform for quantum computing, offering scalability. In this study, we showcase the realization of atomic qubits in atom-molecular Bose-Einstein condensate, belonging to three distinct classes. In the first case, the condensed molecules form a droplet platform with a flat-top configuration, facilitating effective isolation from both external environments and neighbouring molecules. The second atomic qubits have wavefunctions in the ``pulse" form, exhibiting power law behaviour, whereas the third one has ground and excited state wavefunctions in their respective composite forms, $\sech^2{\beta x}$ and $\sech{\beta x}\tanh{\beta x}$. The localization of the qubits depends on the chemical potential, which is governed by the photo association, providing effective control for qubit manipulation. The relevant parameters, such as energy level separation, healing length, and atom numbers, are found to be influenced by the non-linearity and strength of photo associations governing the behaviour of macroscopic qubits and molecular droplets.