Toward scalable information processing with ultracold polar molecules in an electric field: a numerical investigation

TL;DR

This paper explores the potential of ultracold polar molecules in an electric field for scalable quantum information processing, demonstrating high-fidelity operations feasible within microseconds through numerical simulations.

Contribution

It introduces a numerical investigation of quantum algorithms using ultracold NaCs molecules, highlighting scalable logical operations with intermolecular gates in such systems.

Findings

High-fidelity quantum operations achievable within hundreds of microseconds.

Demonstrated implementation of arithmetic and Deutsch-Josza algorithms.

Potential for manipulating large qubit systems in ultracold polar molecules.

Abstract

We numerically investigate the possibilities of driving quantum algorithms with laser pulses in a register of ultracold NaCs polar molecules in a static electric field. We focuse on the possibilities of performing scalable logical operations by considering circuits that involve intermolecular gates (implemented on adjacent interacting molecules) to enable the transfer of information from one molecule to another during conditional laser-driven population inversions. We study the implementation of an arithmetic operation (the addition of 0 or 1 on a binary digit and a carry in) which requires population inversions only and the Deutsch-Josza algorithm which requires a control of the phases. Under typical experimental conditions, our simulations show that high fidelity logical operations involving several qubits can be performed in a time scale of a few hundred of microseconds, opening promising perspectives for the manipulation of a large number of qubits in these systems.