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Nonlinear microwave filter

Foreign code F210010338
File No. E128P05TW
Posted date Feb 2, 2021
Country Taiwan
Application number 108142381
Gazette No. 202029564
Date of filing Nov 21, 2019
Gazette Date Aug 1, 2020
Priority data
  • P2018-219739 (Nov 22, 2018) JP
Title Nonlinear microwave filter
Abstract This nonlinear microwave filter is provided with quantum bits that are formed on a circuit board in which target quantum bits are formed which are quantum bits controlled in a superconducting quantum circuit, and that are coupled to a control waveguide to which the target quantum bits are coupled, wherein the distance to a waveguide end in the control waveguide is within a predetermined range from semi integer times the resonant wavelength, the quantum bits have a resonant frequency in which the difference from the resonant frequency of the target quantum bits is within a predetermined range, and the coupling to the control waveguide is stronger by a predetermined value than the coupling between the target quantum bits and the control waveguide.
Outline of related art and contending technology Background of the Invention]
Non-linear microwave filter background of the invention 1. This application is based on Application No. 2018-219739 of the Japanese Application of 22 11, claiming priority, to be incorporated herein.
[Prior Art]
Background of the invention Quantum computer-related technologies are being studied and developed. Techniques relating to quantum computers, Methods of 2 Quantum Bit Gate Operation in Quantum Computers Using Superconducting Quantum Bits are known (Reference is made to Patent Documents 1, 2 ). Advance technical literature
Patent Document Patent Document 1 : U. S. patent Specification No.7613765 Patent Document 2 : U. S. patent Application Publication No. 2016/0380636 Specification
Scope of claims [claim1]
1. A non-linear microwave filter, having quantum bits, said quantum bits being quantum bits formed on a circuit substrate forming a target quantum bit and coupled to a control waveguide, said target quantum bits being quantum bits controlled at a superconducting quantum circuit, and coupled to said control waveguide, The distance of the aforementioned quantum bit element from the waveguide end of the aforementioned control waveguide is within a predetermined range from half an integer multiple of the resonance wavelength, the aforementioned quantum bit element has a resonance frequency within a predetermined range of difference from the resonance frequency of the aforementioned target quantum bit element, and the coupling of the aforementioned quantum bit element to the aforementioned control waveguide is a predetermined value greater than the coupling of the aforementioned target quantum bit element to the aforementioned control waveguide.

[claim2]
2. The non-linear microwave filter, of claim 1 wherein said target quantum bit is located at said waveguide end.

[claim3]
3. The non-linear microwave filter as claimed in claim 1 or 2, is a quantum bit formed on the opposite side of the substrate surface of which the aforementioned target quantum bit is formed in the substrate surface of the aforementioned circuit substrate.
  • Applicant
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • Inventor
  • NAKAMURA YASUNOBU
  • KONO SHINGO
  • KOSHINO KAZUKI
IPC(International Patent Classification)
Reference ( R and D project ) ERATO NAKAMURA Macroscopic Quantum Machines AREA
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