Quantum Computing for Molecular Vibronic Spectra and Gaussian Boson Sampling

TL;DR

This paper explores the connection between boson sampling and molecular vibronic spectroscopy, highlighting how quantum devices can simulate complex molecular spectra and introducing a new vibronic boson sampling approach.

Contribution

It establishes a theoretical link between boson sampling and molecular vibronic spectra, and discusses experimental implementations using quantum devices.

Findings

Boson sampling is computationally equivalent to molecular vibronic spectroscopy.

Introduction of vibronic boson sampling as a new quantum simulation method.

Discussion of experimental demonstrations of molecular spectroscopy with quantum devices.

Abstract

Boson sampling (BS) is a multimode linear optical problem that is expected to be intractable on classical computers. It was recently suggested that molecular vibronic spectroscopy (MVS) is computationally as complex as BS. In this review, we discuss the correspondence relation between BS and MVS and briefly introduce the experimental demonstrations of the molecular spectroscopic process using quantum devices. The similarity of the two theories results in another BS setup, which is called "vibronic BS". The hierarchical structure of vibronic BS, which includes the original BS and other Gaussian BS, is also explained.