Going beyond gadgets: the importance of scalability for analogue quantum simulators

Dylan Harley (), Ishaun Datta, Frederik Ravn Klausen, Andreas Bluhm, Daniel Stilck França, Albert H. Werner and Matthias Christandl
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Dylan Harley: University of Copenhagen
Ishaun Datta: Stanford University
Frederik Ravn Klausen: University of Copenhagen
Andreas Bluhm: CNRS, Grenoble INP, LIG
Daniel Stilck França: UCBL, CNRS, Inria
Albert H. Werner: University of Copenhagen
Matthias Christandl: University of Copenhagen

Nature Communications, 2024, vol. 15, issue 1, 1-16

Abstract: Abstract Quantum hardware has the potential to efficiently solve computationally difficult problems in physics and chemistry to reap enormous practical rewards. Analogue quantum simulation accomplishes this by using the dynamics of a controlled many-body system to mimic those of another system; such a method is feasible on near-term devices. We show that previous theoretical approaches to analogue quantum simulation suffer from fundamental barriers which prohibit scalable experimental implementation. By introducing a new mathematical framework and going beyond the usual toolbox of Hamiltonian complexity theory with an additional resource of engineered dissipation, we show that these barriers can be overcome. This provides a powerful new perspective for the rigorous study of analogue quantum simulators.

Date: 2024
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DOI: 10.1038/s41467-024-50744-9

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