2020/10/31 by Ryan R. Ferguson, Luca Dellantonio, Karl Jansen +3 · 1 citation
Physics and Astronomy · #quant-ph #hep-lat
paper · pdf · doi:10.1103/physrevlett.126.220501
published as Physical Review Letters 2021 · Five pages of main text and three pages of supplemental material
arxiv created 2021/03/15 · arxiv updated 2021/08/03
Variational quantum eigensolvers (VQEs) combine classical optimization with efficient cost function evaluations on quantum computers. We propose a new approach to VQEs using the principles of measurement-based quantum computation. This strategy uses entagled resource states and local measurements. We present two measurement-based VQE schemes. The first introduces a new approach for constructing variational families. The second provides a translation of circuit-based to measurement-based schemes. Both schemes offer problem-specific advantages in terms of the required resources and coherence times.