Scalable Quantum Computing Infrastructure Based on Superconducting Electronics

Mukhanov, Oleg A.; Plourde, B. L. T.; Opremcak, Alex; Liu, Chuan-Hong; McDermott, Robert; Kirichenko, A.F.; Howington, Caleb; Walter, Jason; Hutchings, Matthew; Vernik, Igor V.; Yohannes, Daniel; Dodge, Kenneth; Ballard, Andrew

doi:10.1109/iedm19573.2019.8993634

Cited by 20 publications

(3 citation statements)

References 15 publications

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“…A promising path forward is to bring the control electronics close to the quantum chip, at cryogenic temperatures. Although important steps in this direction have been taken 4,5,[12][13][14][15][16][17][18][19] , high-fidelity multi-qubit control and a universal gate set remain to be demonstrated using cryogenic controllers. A central challenge is that the power dissipation of the control electronics easily surpasses the typical cooling power of 10 μW available at 20 mK (refs.…”

Section: Green Open Access Added To Tu Delft Institutional Repositorymentioning

confidence: 99%

CMOS-based cryogenic control of silicon quantum circuits

Xue

Patra

Dijk

et al. 2021

Nature

203

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Section: Green Open Access Added To Tu Delft Institutional Repositorymentioning

confidence: 99%

CMOS-based cryogenic control of silicon quantum circuits

Xue

Patra

Dijk

et al. 2021

Nature

203

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“…Furthermore, we can design SQCCs with various output frequencies for different qubits to avoid crosstalk. For extensive control of more qubits, we can also implement the multi-chip module, interconnection across temperature regions, and other technologies to connect SQCC with qubits to avoid quasi-particle poisoning and other problems [30,31].…”

Section: Scaling Scheme For Multi-qubit Controlmentioning

confidence: 99%

Low power single flux quantum qubit control circuit without high-frequency input

Weng

Peng

Ren

2023

Supercond. Sci. Technol.

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The use of high-frequency input signals from room-temperature microwave sources makes it difficult to scale up the number of quantum bits in universal quantum computers. To address this issue, superconducting single flux quantum (SFQ) integrated circuits are being explored as suitable candidates for qubit manipulation in universal quantum computers. This paper deals with a scalable SFQ qubit control circuit (SQCC) structure that requires only low-frequency input. The circuit mainly consists of a pulse generator and a counter, that output the SFQ pulse train with adjustable frequency and a controllable number of pulses, which is applicable to control single-qubit Clifford operations. The design of low-voltage rapid single flux quantum (LV-RSFQ) and Energy-efficient rapid single flux quantum (ERSFQ) for the SQCC achieves low power consumption and provides a basis for scaling up SQCC to control more qubits. The proposed circuits are fabricated under SIMIT-Nb03 process and successfully pass test verification. The achieved test results reveal that the adjustable output frequency ranges of the SQCC based on the LV-RSFQ and ERSFQ designs in order are [2.40, 8.11] GHz and [4.81, 5.14] GHz. In the operating frequency range, the circuit is able to generate the correct number of SFQ pulses under control. The controllable number range is from 1 to 128. When the circuits operate at 5 GHz, the total power consumptions of the above circuits in order are 23.88 μW and 6.2 μW. All input signals are low-frequency signals, which frees the control of large-scale qubits from limitations caused by high-frequency inputs produced by room-temperature microwave sources.

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“…With the increasing number of qubits, such approaches become increasingly difficult due to hardware overhead, heat load management, and signal latency. For further scaling up of superconducting quantum computing, several cryogenic quantum-classical interfaces have emerged to circumvent this bottleneck, such as photonic links, [4] cryogenic CMOS-based circuits [5,6] single flux quantum (SFQ) circuits, [7,8] etc.…”

Section: Introductionmentioning

confidence: 99%

Single-flux-quantum-based qubit control with tunable driving strength

Liu 刘,

Wang 王,

Ji 季

et al. 2023

Chinese Phys. B

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Single-flux-quantum (SFQ) circuits have great potential in building cryogenic quantum-classical interfaces for scaling up superconducting quantum processors. SFQ-based quantum gates have been designed and realized. However, current control schemes are difficult to tune the driving strength to qubits, which restricts the gate length and usually induces leakage to unwanted levels. In this study, we design the scheme and corresponding pulse generator circuit to continuously adjust the driving strength by coupling SFQ pulses with variable intervals. This scheme not only provides a way to adjust the SFQ-based gate length, but also proposes the possibility to tune the driving strength envelope. Simulations show that our scheme can suppress leakage to unwanted levels and reduce the error of SFQ-based Clifford gates by more than an order of magnitude.

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Scalable Quantum Computing Infrastructure Based on Superconducting Electronics

Cited by 20 publications

References 15 publications

CMOS-based cryogenic control of silicon quantum circuits

CMOS-based cryogenic control of silicon quantum circuits

Low power single flux quantum qubit control circuit without high-frequency input

Single-flux-quantum-based qubit control with tunable driving strength

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