US 12,223,392 B2
Amplitude modulated pulses for implementation of entangling gates in ion trap quantum computers
Reinhold Blumel, Middletown, CT (US); and Nikodem Grzesiak, College Park, MD (US)
Assigned to IONQ, INC., College Park, MD (US)
Filed by IONQ, INC., College Park, MD (US)
Filed on Feb. 25, 2022, as Appl. No. 17/681,504.
Claims priority of provisional application 63/155,175, filed on Mar. 1, 2021.
Prior Publication US 2022/0405627 A1, Dec. 22, 2022
Int. Cl. G06N 10/40 (2022.01); G06F 30/20 (2020.01); G06F 30/30 (2020.01); G06N 10/20 (2022.01)
CPC G06N 10/40 (2022.01) [G06N 10/20 (2022.01); G06F 30/20 (2020.01); G06F 30/30 (2020.01)] 21 Claims
OG exemplary drawing
 
1. A method of performing an entangling gate operation using a quantum computer system, comprising:
configuring, by a classical computer, an amplitude function of an amplitude-modulated laser pulse over a plurality of time segments to cause entangling interaction between a pair of trapped ions of a plurality of trapped ions, each of the plurality of trapped ions having two frequency-separated states defining a qubit, wherein the amplitude function in each time segment is splined using a set of basis functions and associated control parameters; and
performing an entangling gate operation between the pair of trapped ions by applying, by a system controller, an amplitude-modulated laser pulse having the configured amplitude function to the pair of trapped ions.