Taming numerical errors in simulations of continuous variable non-Gaussian state preparation.

ABSTRACT: Numerical simulation of continuous variable quantum state preparation is a necessary tool for optimization of existing quantum information processing protocols. A powerful instrument for such simulation is the numerical computation in the Fock state representation. It unavoidably uses an approximation of the infinite-dimensional Fock space by finite complex vector spaces implementable with classical digital computers. In this approximation we analyze the accuracy of several currently available methods for computation of the truncated coherent displacement operator. To overcome their limitations we propose an alternative with improved accuracy based on the standard matrix exponential. We then employ the method in analysis of non-Gaussian state preparation scheme based on coherent displaceme

SUBMITTER: Provaznik J 

PROVIDER: S-EPMC9532453 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature