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Solid-state qubits under control

D. V. Averin

NatureApr 1, 199931 citations

Research and Development of Quantum Computers Based on Superconductor and Semiconductor Devices

Tsuyoshi Yamamoto, Takahiro Mori

Quantum computer is able to compute some of the hard problems which cannot be solved by conventional ones. Toward practical application, large-scale integration of qubits is necessary. Solid-state devices, such as superconductor and semiconductor qubit devices, are promising candidates to realize the large-scale integration. This paper reviews the current status of research and development of quantum computers based on superconductor and semiconductor devices.

IEEJ Transactions on Fundamentals and MaterialsApr 30, 20220 citations

Diverse methods and practical aspects in controlling single semiconductor qubits: a review

Jia-Ao Peng, Chu-Dan Qiu, Wen-Long Ma +1 more

Abstract Quantum control allows a wide range of quantum operations employed in molecular physics, nuclear magnetic resonance and quantum information processing. Thanks to the existing microelectronics industry, semiconducting qubits, where quantum information is encoded in spin or charge degree freedom of electrons or nuclei in semiconductor quantum dots, constitute a highly competitive candidate for scalable solid-state quantum technologies. In quantum information processing, advanced control techniques are needed to realize quantum manipulations with both high precision and noise resilience. In this review, we first introduce the basics of various widely-used control methods, including resonant excitation, adabatic passage, shortcuts to adiabaticity, composite pulses, and quantum optimal control. Then we review the practical aspects in applying these methods to realize accurate and robust quantum gates for single semiconductor qubits, such as Loss–DiVincenzo spin qubit, spinglet-triplet qubit, exchange-only qubit and charge qubit.Abstract Quantum control allows a wide range of quantum operations employed in molecular physics, nuclear magnetic resonance and quantum information processing. Thanks to the existing microelectronics industry, semiconducting qubits, where quantum information is encoded in spin or charge degree freedom of electrons or nuclei in semiconductor quantum dots, constitute a highly competitive candidate for scalable solid-state quantum technologies. In quantum information processing, advanced control techniques are needed to realize quantum manipulations with both high precision and noise resilience. In this review, we first introduce the basics of various widely-used control methods, including resonant excitation, adabatic passage, shortcuts to adiabaticity, composite pulses, and quantum optimal control. Then we review the practical aspects in applying these methods to realize accurate and robust quantum gates for single semiconductor qubits, such as Loss–DiVincenzo spin qubit, spinglet-triplet qubit, exchange-only qubit and charge qubit.

arXiv:2412.03286Journal of SemiconductorsJan 1, 20260 citations

Trends and prospects for semiconductor qubit research

哲夫小寺, Tetsuo Kodera

Mar 1, 20240 citations

DC-Readout of Semiconductor Spin Qubits: Opportunities and Limits

Gerd Kiene, Oriol Pietx-Casas, Masoud Babaie +2 more

This paper presents extensive guidelines for the design of an integrated DC-readout interface for semiconductor spin qubits. Since the focus is on the readout via a single electron transistor (SET), the SET behavior and performance are first described and modeled, showing that the signal-to-noise ratio (SNR) theoretically achievable by a SET-based DC-readout is significantly beyond the state-of-the-art. Practical circuit architectures for implementing a DC-readout, such as the voltage amplifier, the transimpedance amplifier, the charge sampling, and the current pre-amplifier, are then analyzed by deriving their design equations and trade-offs. As a result, the practical performances of those different solutions are evaluated and compared, thus presenting clear selection criteria for the readout architecture and its design equations given the specific parameters of the SET sensor.This paper presents extensive guidelines for the design of an integrated DC-readout interface for semiconductor spin qubits. Since the focus is on the readout via a single electron transistor (SET), the SET behavior and performance are first described and modeled, showing that the signal-to-noise ratio (SNR) theoretically achievable by a SET-based DC-readout is significantly beyond the state-of-the-art. Practical circuit architectures for implementing a DC-readout, such as the voltage amplifier, the transimpedance amplifier, the charge sampling, and the current pre-amplifier, are then analyzed by deriving their design equations and trade-offs. As a result, the practical performances of those different solutions are evaluated and compared, thus presenting clear selection criteria for the readout architecture and its design equations given the specific parameters of the SET sensor.

IEEE Transactions on Circuits and Systems I Regular PapersFeb 19, 20255 citations

Solid State Qubits

János A. Bergou, Mark S. Hillery, Mark E. Saffman

Graduate texts in physicsJan 1, 20210 citations

Semiconductor qubits in practice

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