Multiplex readout system

A multiplexer and readout line technology, applied in the field of qubit readout systems, can solve problems that hinder the realization of large-scale quantum computing

Pending Publication Date: 2022-05-06
GOOGLE LLC
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  • Abstract
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  • Application Information

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Problems solved by technology

Multiple challenges in designing and implementing quantum architectures to control, program, and maintain quantum hardware hinder the realization of large-scale quantum computing

Method used

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Embodiment Construction

[0029] Quantum computing requires coherent processing of quantum information stored in a quantum computer's quantum bits (qubits). Superconducting quantum computing is a promising realization of solid-state quantum computing technology, in which quantum information processing systems are constructed in part from superconducting materials. In order to operate quantum information processing systems employing solid-state quantum computing techniques, such as superconducting qubits, the systems are kept at extremely low temperatures, for example in the tens of mK. The system's extreme cooling keeps the superconducting material below its critical temperature and helps avoid unwanted state transitions. To maintain such low temperatures, quantum information processing systems can operate inside cryostats such as dilution refrigerators.

[0030] In some implementations, the control signal is generated in a higher temperature environment and sent to the quantum information processing ...

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Abstract

A circuit is presented that includes a first amplifier having an input, a transmission line having a first end and a second end. A first end of the transmission line is coupled to an input of the first amplifier and the plurality of channels. Each channel includes a plurality of resonators arranged to read out a plurality of qubits, respectively, and a readout line arranged to receive readout signals from the plurality of resonators. The readout line of each channel is coupled to the transmission line, and each channel is configured to output a respective signal in a respective frequency band different from the frequency bands of other channels of the plurality of channels.

Description

technical field [0001] This topic deals with readout systems for qubits. Background technique [0002] Large-scale quantum computers have the potential to provide fast solutions to certain types of difficult problems. Multiple challenges in designing and implementing quantum architectures to control, program, and maintain quantum hardware hinder the realization of large-scale quantum computing. Contents of the invention [0003] This invention describes techniques for a multiplexed readout system for qubits. [0004] In general, an innovative aspect of the inventive subject matter can be embodied in a circuit comprising: a first amplifier having an input; a transmission line having a first end and a second end, wherein the first end of the transmission line is coupled to an input to the first amplifier; and a plurality of channels, each channel comprising: a plurality of resonators arranged to respectively read out a plurality of qubits, and a readout line arranged to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N10/40
CPCG06N10/00H03F19/00H03F2200/165H03F2200/171
Inventor O.纳曼E.杰弗里T.C.怀特
Owner GOOGLE LLC
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