Nearly Optimal Quantum Algorithm for Generating the Ground State of a Free Quantum Field Theory

@article{Bagherimehrab2022NearlyOQ,
  title={Nearly Optimal Quantum Algorithm for Generating the Ground State of a Free Quantum Field Theory},
  author={Mohsen Bagherimehrab and Yuval R. Sanders and Dominic W. Berry and Gavin K. Brennen and Barry C. Sanders},
  journal={PRX Quantum},
  year={2022}
}
We devise a quasilinear quantum algorithm for generating an approximation for the ground state of a quantum field theory (QFT). Our quantum algorithm delivers a super-quadratic speedup over the state-of-the-art quantum algorithm for ground-state generation, overcomes the ground-state-generation bottleneck of the prior approach and is optimal up to a polylogarithmic factor. Specifically, we establish two quantum algorithms -- Fourier-based and wavelet-based -- to generate the ground state of a… 

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