Tunable Holstein model with cold polar molecules

TL;DR

This paper demonstrates how an ensemble of polar molecules in an optical lattice can be modeled as a tunable open quantum system, enabling simulation of excitation transfer and polaron phenomena through adjustable parameters.

Contribution

It introduces a controllable Holstein model using cold polar molecules, allowing experimental tuning of quantum simulation parameters.

Findings

The system can simulate excitation energy transfer.

Tuning parameters alters the nature of energy transfer.

The model provides a platform for studying polaron effects.

Abstract

We show that an ensemble of polar molecules trapped in an optical lattice can be considered as a controllable open quantum system. The coupling between collective rotational excitations and the motion of the molecules in the lattice potential can be controlled by varying the strength and orientation of an external DC electric field as well as the intensity of the trapping laser. The system can be described by a generalized Holstein Hamiltonian with tunable parameters and can be used as a quantum simulator of excitation energy transfer and polaron phenomena. We show that the character of excitation energy transfer can be modified by tuning experimental parameters.