公开(公告)号：US20180225586A1

公开(公告)日：2018-08-09

申请号：US15455470

申请日：2017-03-10

Applicant: International Business Machines Corporation

Inventor： Jerry M. Chow ,  Jay M. GAMBETTA ,  Easwar MAGESAN ,  Sarah E. SHELDON

IPC: G06N99/00 ,  H03K19/195

CPC classification number: G06N10/00 ,  B82Y10/00 ,  H03K19/1958

Abstract: In a system including a cross-resonance gate having a superconducting control qubit and having a superconducting target qubit coupled through a bus resonator, echo pulses are generated at a first frequency and directed to the control qubit, wherein the first frequency is on resonance with the control qubit. Cross-resonance pulses are generated at a second frequency on resonance with the target qubit and applied to the control qubit, wherein the generating and applying the cross-resonance pulses induce rotations on the target qubit through an interaction that is mediated by the bus resonator. Cancellation pulses are generated at the second frequency and applied to the target qubit. Sets of Hamiltonian tomographies may be measured to determine appropriate amplitudes and phases of the cross-resonance and cancellation pulses.