Title:
AMPLIFIER CIRCUIT, CHIP, AND QUANTUM BIT READING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/066565
Kind Code:
A1
Abstract:
An amplifier circuit, a chip, and a quantum bit reading system, applied to the fields of quantum state reading and quantum weak measurement. The amplifier circuit comprises N lumped capacitor and inductor modules that are connected in series, and the lumped capacitor and inductor modules each comprise a lumped capacitor unit and a lumped inductor unit that are connected in series; the lumped inductor unit of at least one lumped capacitor and inductor module comprises at least one superconducting quantum interference device (SQUID), the lumped capacitor and inductor module comprising the SQUID further comprises a pumping signal line, and the pumping signal line is mutually inductively coupled with the SQUID. The amplifier circuit is equivalent to a circuit in which an equivalent lumped capacitor module is connected in series with an equivalent lumped inductor module, the two equivalent modules form a nonlinear resonator, and the Q value of coupling between the nonlinear resonator and an external environment is the ratio of the impedance of the nonlinear resonator to the impedance of the external environment. In order to form a resonant mode, the capacitance value in the nonlinear resonator is designed to be small, so that the capacitor can manufactured according to a planar capacitor process, thereby simplifying the manufacturing process of the amplifier circuit.
Inventors:
WU YUNFAN (CN)
LONG JUNLING (CN)
LONG JUNLING (CN)
Application Number:
PCT/CN2023/103490
Publication Date:
April 04, 2024
Filing Date:
June 28, 2023
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03F19/00; G06N10/40
Foreign References:
| CN110120792A | 2019-08-13 | |||
| CN110138352A | 2019-08-16 | |||
| CN110277969A | 2019-09-24 | |||
| CN113242027A | 2021-08-10 |
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
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