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Control and readout topology for spin qubits

A qubit and quantum computing technology, applied in the field of quantum computing, can solve problems such as complex technology and design, filtering and printed circuit board design, and achieve the effects of reducing overlapping length, reducing occupied area, and strong capacitive coupling

Pending Publication Date: 2022-06-21
INTERUNIVERSITAIR MICRO ELECTRONICS CENT (IMEC VZW)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it is known that the operation of semiconductor spin qubits, including readout and control, requires complex radio frequency (RF) technology and design
As the number of semiconductor spin qubits on the same chip is expected to increase, such as qubit chip wiring fanouts and peripherals (including microwave sources), filtering for different cooling stages, and the design of printed circuit boards (PCBs) will also become more complicated

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  • Control and readout topology for spin qubits
  • Control and readout topology for spin qubits
  • Control and readout topology for spin qubits

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Embodiment Construction

[0025] Spin qubits based on quantum dots in, for example, silicon can be used to perform quantum computing operations. The state of a quantum bit ("qubit") can be encoded in the spin state (ie, "up" or "down") of the electrons in the quantum dot, eg, relative to an externally applied static magnetic field, and by being able to detect and manipulate With such spin states, qubits can be read out and controlled according to the requirements of various quantum computing algorithms. The following will refer to figure 1 More details are given on example general methods for controlling and reading out such qubits. The advantage of silicon-based spin qubits is that they can be fabricated using techniques that already exist for making conventional transistors, for example. Qubits can be compact in size and span, for example, tens of nanometers. Qubits can be tuned by using one or more gate electrodes and have reduced stability in both relaxation time and coherence time. Silicon-bas...

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Abstract

There is provided an integrated system (201) for quantum computing, comprising at least: at least one semiconductor spin qubit (210); a feed line (240) configured to function as an electron spin resonance (ESR) antenna for control of the at least one qubit; at least one resonator (220j), and a ground plane (250) common to the feed line and the at least one resonator. The at least one resonator is capacitively coupled to the feed line and is configured for readout of the at least one qubit via the feed line. The feed line and the at least one resonator are arranged in adjacent layers separated at least by a dielectric. A corresponding method of performing quantum computing using such an integrated system is also provided.

Description

technical field [0001] The present disclosure relates generally to the field of quantum computing. In particular, the present disclosure relates to the control and readout of systems using one or more semiconductor spin quantum bits (qubits). Background technique [0002] Over the past decade, the field of quantum computing has expanded with the demonstration of several small-scale quantum computer prototypes. Semiconductor spin qubits are one of the candidates for realizing quantum processors and offer compact form factors as well as long qubit stabilization times (eg, in terms of relaxation and coherence). Such spin qubits are also interesting because they can be fabricated using fabrication techniques similar to those already employed in the microelectronics industry, and existing prototypes are expected to be scaled to at least a few dozen qubits in the next few years. bits and enter the so-called Noisy Intermediate Scale Quantum (NISQ) era of quantum computing. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N10/40G06N10/60H10N69/00
CPCG06N10/00B82Y10/00H01L29/66977H01L29/423G06N10/40
Inventor F·A·莫希亚丁李若愚B·戈沃雷努S·布雷贝尔斯
Owner INTERUNIVERSITAIR MICRO ELECTRONICS CENT (IMEC VZW)