Large-scale photonic network with squeezed vacuum states for molecular vibronic spectroscopy.

Autor: Zhu HH; Quantum Science and Engineering Centre (QSec), Nanyang Technological University, Singapore, Singapore., Sen Chen H; Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education, School of Physics, Beijing Institute of Technology, Beijing, China., Chen T; Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education, School of Physics, Beijing Institute of Technology, Beijing, China. chentian@bit.edu.cn., Li Y; Quantum Science and Engineering Centre (QSec), Nanyang Technological University, Singapore, Singapore., Luo SB; School of Microelectronics, Southern University of Science and Technology, Shenzhen, China., Karim MF; Quantum Science and Engineering Centre (QSec), Nanyang Technological University, Singapore, Singapore., Luo XS; Advanced Micro Foundry, Singapore, Singapore., Gao F; Advanced Micro Foundry, Singapore, Singapore., Li Q; Advanced Micro Foundry, Singapore, Singapore., Cai H; Institute of Microelectronics, A*STAR (Agency for Science, Technology, and Research), Singapore, Singapore., Chin LK; Department of Electrical Engineering, City University of Hong Kong, Hong Kong SAR, China. lkchin@cityu.edu.hk., Kwek LC; Quantum Science and Engineering Centre (QSec), Nanyang Technological University, Singapore, Singapore. cqtklc@nus.edu.sg.; Centre for Quantum Technologies, National University of Singapore, Singapore, Singapore. cqtklc@nus.edu.sg., Nordén B; Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden. norden@chalmers.se., Zhang XD; Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education, School of Physics, Beijing Institute of Technology, Beijing, China. zhangxd@bit.edu.cn., Liu AQ; Quantum Science and Engineering Centre (QSec), Nanyang Technological University, Singapore, Singapore. eaqliu@ntu.edu.sg.; Institute of Quantum Technology (IQT), The Hong Kong Polytechnic University, Hong Kong SAR, China. eaqliu@ntu.edu.sg.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Jul 18; Vol. 15 (1), pp. 6057. Date of Electronic Publication: 2024 Jul 18.
DOI: 10.1038/s41467-024-50060-2
Abstrakt: Although molecular vibronic spectra generation is pivotal for chemical analysis, tackling such exponentially complex tasks on classical computers remains inefficient. Quantum simulation, though theoretically promising, faces technological challenges in experimentally extracting vibronic spectra for molecules with multiple modes. Here, we propose a nontrivial algorithm to generate the vibronic spectra using states with zero displacements (squeezed vacuum states) coupled to a linear optical network, offering ease of experimental implementation. We also fabricate an integrated quantum photonic microprocessor chip as a versatile simulation platform containing 16 modes of single-mode squeezed vacuum states and a fully programmable interferometer network. Molecular vibronic spectra of formic acid and thymine under the Condon approximation are simulated using the quantum microprocessor chip with high reconstructed fidelity ( > 92%). Furthermore, vibronic spectra of naphthalene, phenanthrene, and benzene under the non-Condon approximation are also experimentally simulated. Such demonstrations could pave the way for solving complicated quantum chemistry problems involving vibronic spectra and computational tasks beyond the reach of classical computers.
(© 2024. The Author(s).)
Databáze: MEDLINE
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