Simulating the vibrational quantum dynamics of molecules using photonics

Chris Sparrow, Enrique Martin Lopez, Nicola Maraviglia, Alex Neville, Christopher Harrold, Jacques Carolan, Yogesh Joglekar, Toshikazu Hashimoto, Nobuyuki Matsuda, Jeremy O'Brien, David Tew, Anthony Laing

Research output: Contribution to journalArticle (Academic Journal)peer-review

98 Citations (Scopus)
324 Downloads (Pure)


Advances in control techniques for vibrational quantum states in molecules
present new challenges for modelling such systems, which could be amenable
to quantum simulation methods. Here, by exploiting a natural mapping
between vibrations in molecules and photons in waveguides, we demonstrate
a reprogrammable photonic chip as a versatile simulation platform for a range
of quantum dynamic behaviour in different molecules. We begin by
simulating the time evolution of vibrational excitations in the harmonic
approximation for several four-atom molecules, including H CS, SO ,
HNCO, HFHF, N and P . We then simulate coherent and dephased energy
transport in the simplest model of the peptide bond in proteins—Nmethylacetamide—
and simulate thermal relaxation and the effect of
anharmonicities in H O. Finally, we use multi-photon statistics with a
feedback control algorithm to iteratively identify quantum states that increase
a particular dissociation pathway of NH . These methods point to powerful
new simulation tools for molecular quantum dynamics and the field of
Original languageEnglish
Pages (from-to)660-667
Number of pages8
Issue number7707
Early online date30 May 2018
Publication statusPublished - 31 May 2018

Structured keywords

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