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Quantum optical emulation of molecular vibronic spectroscopy using a trapped-ion device

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Abstract

Molecules are one of the most demanding quantum systems to be simulated by quantum computers due to their complexity and the emergent role of quantum nature. The recent theoretical proposal of Huh et al. (Nature Photon., 9, 615 (2015)) showed that a multi-photon network with a Gaussian input state can simulate a molecular spectroscopic process. Here, we present the first quantum device that generates a molecular spectroscopic signal with the phonons in a trapped ion system, using SO2 as an example. In order to perform reliable Gaussian sampling, we develop the essential experimental technology with phonons, which includes the phase-coherent manipulation of displacement, squeezing, and rotation operations with multiple modes in a single realization. The required quantum optical operations are implemented through Raman laser beams. The molecular spectroscopic signal is reconstructed from the collective projection measurements for the two-phonon-mode. Our experimental demonstration will pave the way to large-scale molecular quantum simulations, which are classically intractable, but would be easily verifiable by real molecular spectroscopy.

Graphical abstract: Quantum optical emulation of molecular vibronic spectroscopy using a trapped-ion device

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Publication details

The article was received on 24 Oct 2017, accepted on 19 Nov 2017 and first published on 01 Dec 2017


Article type: Edge Article
DOI: 10.1039/C7SC04602B
Citation: Chem. Sci., 2018, Advance Article
  • Open access: Creative Commons BY-NC license
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    Quantum optical emulation of molecular vibronic spectroscopy using a trapped-ion device

    Y. Shen, Y. Lu, K. Zhang, J. Zhang, S. Zhang, J. Huh and K. Kim, Chem. Sci., 2018, Advance Article , DOI: 10.1039/C7SC04602B

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