Open AccessImproving approximate vacuum prepared by the adiabatic quantum computation
Author(s) -
Oshima Kazuto
Publication year - 2022
Publication title -
iet quantum communication
Language(s) - English
Resource type - Journals
ISSN - 2632-8925
DOI - 10.1049/qtc2.12046
Subject(s) - adiabatic process , adiabatic quantum computation , vacuum state , quantum mechanics , hamiltonian (control theory) , physics , superposition principle , excited state , quantum , computation , qed vacuum , false vacuum , quantum computer , quantum process , classical mechanics , quantum dynamics , mathematics , algorithm , mathematical optimization
According to the quantum adiabatic theorem, we can in principle obtain a true vacuum of a quantum system starting from a trivial vacuum of a simple Hamiltonian. In actual adiabatic digital quantum simulation with finite time length and non‐infinitesimal time steps, we can only obtain an approximate vacuum that is supposed to be a superposition of a true vacuum and excited states. We propose a procedure to improve the approximate vacuum.