Searched for: subject%3A%22Cryo%255C-CMOS%22
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Gong, J. (author), Charbon-Iwasaki-Charbon, E. (author), Sebastiano, F. (author), Babaie, M. (author)
This article presents the first cryogenic phase-locked loop (PLL) operating at 4.2 K. The PLL is designed for the control system of scalable quantum computers. The specifications of PLL are derived from the required control fidelity for a single-qubit operation. By considering the benefits and challenges of cryogenic operation, a dedicated...
journal article 2023
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Cerviño Fungueiriño, David Cervino (author)
Quantum computers exploit the quantum behavior of quantum bits (qubits) that are typically operated at cryogenic temperature. Qubits require an electronic control interface. Nowadays, such classical electronic controllers use bulky instruments operated far fromthe qubits outside the cryostat. To run practical quantum algorithms, thousands to...
master thesis 2022
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Wu, Yu-Wen (author)
Voltage references are an essential building block for many electronic systems, such as analog-to-digital and digital-to-analog converters, and voltage regulators. Although state-of-the-art voltage references already demonstrated high performance over the standard temperature range (−40 °C to 125 °C), specific applications require an operating...
master thesis 2022
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Damsteegt, Rob (author)
Scalable universal quantum computers require classical control hardware, physically close to the quantum devices at cryogenic temperatures. Such classical controllers need digital memory for various applications, ranging from high-speed queues to high-speed and low-speed lookup tables and working memory. The power consumption of the memories...
master thesis 2022
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Overwater, R.W.J. (author), Babaie, M. (author), Sebastiano, F. (author)
Quantum error correction (QEC) is required in quantum computers to mitigate the effect of errors on physical qubits. When adopting a QEC scheme based on surface codes, error decoding is the most computationally expensive task in the classical electronic back-end. Decoders employing neural networks (NN) are well-suited for this task but their...
journal article 2022
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Kiene, G. (author), GUNAPUTI SREENIVASULU, A.M. (author), Overwater, R.W.J. (author), Babaie, M. (author), Sebastiano, F. (author)
This paper reports the experimental characterization and modelling of a stand-Alone StrongARM comparator at both room temperature (RT) and cryogenic temperature (4.2 K). The observed 6-dB improvement in the comparator input noise at 4.2 K is attributed to the reduction of the thermal noise and to the suppressed shot noise in the MOS...
conference paper 2022
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Patra, B (author)
Quantum computers can provide exponential speedup in solving certain computational problems pertaining to drug discovery, cybersecurity, weather forecasting, etc. Although a quantum computer with just 50-qubits has been shown to surpass the computing power of the best supercomputers in specific applications, millions of qubits would be required...
doctoral thesis 2021
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de Jong, Lennart (author)
A key issue in current quantum computing interfaces is the dense interconnect between electronics at cryogenic temperature (CT) and room temperature (RT). Recently, progress has been made to move more control electronics from RT to CT, reducing interconnect overhead. The next step towards minimal interconnect is a direct wireline interface...
master thesis 2021
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Fakkel, Niels (author)
With the current advancements in quantum computing moving more circuitry into the cryogenic chamber there is a need for high-speed connectivity between the cryogenic and room temperature environment. Studies conducted to date have achieved high-speed links of multiple Gb/s utilizing a single CMOS chip at room temperature, yet a Cryo-CMOS...
master thesis 2021
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GUNAPUTI SREENIVASULU, Aishwarya (author)
Quantum computing offers exponential speed-up for problems that are computationally intractable with classical computing. However, quantum processors with thousands to millions of quantum bits (qubits) are needed. Room-temperature electronics are used to control and readout today's qubits operating at cryogenic temperature. As the number of...
master thesis 2021
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Enthoven, Luc (author)
Disruptive changes in the fields ofcryptography and quantum chemistry can be achieved through quantum computing,as specific computations can be sped up significantly. Thousands to millions ofqubits are required to perform these computations, illustrating the need forlarge quantum computers. These qubits must be cooled to...
master thesis 2020
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't Hart, P.A. (author), Babaie, M. (author), Charbon-Iwasaki-Charbon, E. (author), Vladimirescu, A. (author), Sebastiano, F. (author)
This paper presents a device matching study of a commercial 40-nm bulk CMOS technology operated at cryogenic temperatures. Transistor pairs and linear arrays, optimized for device matching, were characterized over the temperature range from 300 K down to 4.2 K. The device parameters relevant for mismatch, i.e., the threshold voltage and the...
journal article 2020
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Ruffino, A. (author), Peng, Yatao (author), Sebastiano, F. (author), Babaie, M. (author), Charbon-Iwasaki-Charbon, E. (author)
Quantum computers require classical electronics to ensure fault-tolerant operation. To address compactness and scalability, it was proposed to implement such electronics as integrated circuits operating at cryogenic temperatures close to those at which quantum bits (qubits) operate. Circulators are among the most common blocks used in the...
journal article 2020
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Patra, B (author), Mehrpoo, M. (author), Ruffino, A. (author), Sebastiano, F. (author), Charbon-Iwasaki-Charbon, E. (author), Babaie, M. (author)
This paper presents the characterization and modeling of microwave passive components in TSMC 40-nm bulk CMOS, including metal-oxide-metal (MoM) capacitors, transformers, and resonators, at deep cryogenic temperatures (4.2 K). To extract the parameters of the passive components, the pad parasitics were de-embedded from the test structures using...
journal article 2020
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Schriek, E. (author), Sebastiano, F. (author), Charbon-Iwasaki-Charbon, E. (author)
We present a digital cell library optimized for 4.2 K to create controllers that keep quantum processors coherent and entangled. The library, implemented on a standard 40-nm CMOS technology, was employed in the creation of the first 4.2 K RISC-V processor. It has achieved a minimum supply voltage of 590 mV, energy-delay product of 37 fJ/MHz,...
journal article 2020
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Van DIjk, Jeroen Petrus Gerardus (author), Patra, B (author), Xue, X. (author), Samkharadze, Nodar (author), Corna, A. (author), Sammak, A. (author), Scappucci, G. (author), Veldhorst, M. (author), Vandersypen, L.M.K. (author), Charbon-Iwasaki-Charbon, E. (author), Babaie, M. (author), Sebastiano, F. (author)
Building a large-scale quantum computer requires the co-optimization of both the quantum bits (qubits) and their control electronics. By operating the CMOS control circuits at cryogenic temperatures (cryo-CMOS), and hence in close proximity to the cryogenic solid-state qubits, a compact quantum-computing system can be achieved, thus promising...
journal article 2020
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Padalia, Pinakin (author)
Voltage references are one of the fundamental building blocks for designing any analog processing circuit. It serves as a reference for Analog to Digital Converters (ADCs), Digital to Analog Converters (DACs), power/voltage regulators and other measurement and control circuits. The performance of all these circuits cannot be better than the...
master thesis 2019
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Overwater, Ramon (author)
The quantum bits (qubits) at the core of any quantum computers are so fragile that quantum error correction(QEC) schemes are needed to increase their robustness and enable fault-tolerant quantum algorithms. The surface code is one of the most popular QEC schemes, but it requires the availability of an efficient decoder. While neural networks...
master thesis 2019
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van Dijk, J.P.G. (author), Charbon-Iwasaki-Charbon, E. (author), Sebastiano, F. (author)
Quantum computers can potentially provide an unprecedented speed-up with respect to traditional computers. However, a significant increase in the number of quantum bits (qubits) and their performance is required to demonstrate such quantum supremacy. While scaling up the underlying quantum processor is extremely challenging, building the...
journal article 2019
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Kroep, Kees (author)
In order to improve the ability to design digital ICs for cryogenic temperatures, the objective of this work is to characterize the timing performance of standard cells in the TSMC 40nm technology at a temperature range between 4K and 300K. A design was made to perform automated on-chip characterization of standard cell propagation delay, that...
master thesis 2018
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