公开(公告)号：EP4089751A1

公开(公告)日：2022-11-16

申请号：EP20912052.6

申请日：2020-12-28

Applicant: Japan Science and Technology Agency

Inventor： KONO, Shingo ,  NAKAMURA, Yasunobu

IPC: H01L39/22 ,  G06N10/00 ,  H04B10/27 ,  H04B10/70

Abstract: A microwave photon control device includes a first qubit and a second qubit that are connected in parallel to a waveguide through which microwave photons propagate, and a direct coupling between the first qubit and the second qubit. An interval between the first qubit and the second qubit is (1/4 + n/2) times as long as a wavelength of microwave photons (where n is an integer equal to or larger than 0). A quantum entangled state is formed between the first qubit and the second qubit. The direct coupling cancels out a coupling via the waveguide between the first qubit and the second qubit. By a relaxation rate of the first qubit and the second qubit, and a phase of the quantum entangled state being controlled, the microwave photon control device operates while switching between a first operation mode, a second operation mode, and a third operation mode.