Singular-value decomposition using quantum annealing

Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Aug;92(2):023302. doi: 10.1103/PhysRevE.92.023302. Epub 2015 Aug 10.

Abstract

In the present study, we demonstrate how to perform, using quantum annealing, the singular value decomposition and the principal component analysis. Quantum annealing gives a way to find a ground state of a system, while the singular value decomposition requires the maximum eigenstate. The key idea is to transform the sign of the final Hamiltonian, and the maximum eigenstate is obtained by quantum annealing. Furthermore, the adiabatic time scale is obtained by the approximation focusing on the maximum eigenvalue.