On-chip reflection type quantum amplifier with strong isolation function

Abstract

The invention discloses an on-chip reflection type quantum amplifier with a strong isolation function. The quantum amplifier provided by the embodiment of the invention is a two-port on-chip device with a strong isolation function, a circulation function and an amplification function, is small in size and low in dissipation, and has nonreciprocity. According to the on-chip quantum amplifier with the strong isolation function, the gain bandwidth product of the amplifier is increased, the strong isolation function is achieved, meanwhile, an HEMT can be replaced, and the cost of a superconducting quantum computer and the cost of a test system of the superconducting quantum computer are greatly reduced. The on-chip quantum amplifier with the strong isolation function, provided by the embodiment of the invention, can be directly connected with the quantum chip, so that the quantum chip is protected from counteractive interference of a subsequent circuit. Based on the on-chip quantum amplifier provided by the embodiment of the invention, not only is the superconducting quantum test system using the on-chip quantum amplifier provided by the embodiment of the invention simplified, but also the size of the superconducting quantum test system is remarkably reduced, and large-scale development of superconducting quantum computers is facilitated.

Description

technical field [0001] This application relates to but not limited to the technical field of quantum computing, especially an on-chip reflective quantum amplifier with a strong isolation function. Background technique [0002] In the superconducting quantum test system, the transmission of quantum information not only needs to be amplified, but also needs to isolate the reaction of external signals. In related technologies, on the one hand, isolators, circulators, and quantum amplifiers are all independent devices, which are bulky and have serious heat loss, which is not conducive to the large-scale development of superconducting quantum computers; on the other hand, the quantum amplifier gain-bandwidth product (GBP, Gain-Bandwith Product) is smaller, that is to say, for the same quantum amplifier, GBP is determined. If a larger gain is required, it can only work in a narrower bandwidth range. If you want to work in a wider If it works within the bandwidth, the gain will be...

AI Technical Summary

Problems solved by technology

In related technologies, on the one hand, isolators, circulators, and quantum amplifiers are all independent devices, which are bulky and have serious heat loss, which is not conducive to the large-scale development of superconducting quantum computers; on the other hand, the quantum amplifier gain-bandwidth product (GBP, Gain-Bandwith Product) is smaller, that is to say, for the same quantum amplifier, GBP is determined. If a larger gain is required, it can only work in a narrower bandwidth range. If you want to work in a wider Working within the bandwidth range, the gain will be reduced, otherwise it will cause distortion of the amplified input signal

Images