ALEXANDRIA, Va., May 26 -- United States Patent no. 12,639,603, issued on May 26, was assigned to Google LLC (Mountain View, Calif.).

"Iterative construction of stationary quantum states using quantum computers" was invented by Nicholas Charles Rubin (San Francisco) and Ryan Babbush (Venice, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods, systems and apparatus for preparing a target quantum state of a quantum system, where the target quantum state is stationary with respect to a parameterized many-body qubit operator. In one aspect a method includes preparing an initial quantum state as an input state for a first iteration; iteratively evolving the initial quantum state and subsequent input qu...