Numerical analysis of multiaxial test setup for composite cryogenic hydrogen tank development

Hydrogen is one of aviation's most promising fuel alternatives in the coming years. However, to store it, a large and light vessel is needed. <br/><br/>The solution to this problem can be the carbon fibre fuel tank. Composite structures provide significant weight savings, which is crucial in this application. However, despite its superior...

Optical fibre precision positioning at cryogenic conditions

Single photon detectors are an important optical sensing tool in many industries. However, these highly efficient detectors suffer from variations in the size of an optical cavity when cooling down to 3K. An active positioning system is therefore required to correct the relative position of the fibre to the detector, so an optimal and...

Cryogenic Digital-Analog Converter for Two-Qubit Gates in Spin Qubits

<br/>As the number of qubits increases, controlling qubits at cryogenic temperatures with electronics at room temperature becomes infeasible due to the vast number of cabling. This necessitates controlling quantum operations on the qubits with a cryogenic interface, which is low power, scalable and maintains qubit fidelity.<br/><br/>In pursuit...

A Cryo-CMOS Voltage Reference for Quantum Computing Applications

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...

Development of a universal cryogenic test facility

Magnets for High Energy Physics applications built to date are generally superconducting magnets, which operate at cryogenic temperatures. The reliability and safety of the applications are entirely dependent on good design which in turn rely heavily on predictable materials performance. Where at these low temperatures the fracture toughness is...

Cryogenic SiGe Bipolar Amplifiers for Spin-Qubit DC Readout

In recent years, quantum computers have become increasingly popular, with high-profile companies in-vesting more and more resources into the development of quantum-computing prototypes. Such interest is motivated by the exponential increase in the computing power that quantum computers offer over classical computers, which may be used in several...

Cryogenic Hardware Considerations Of Neural Network Decoders For Quantum Error Correction Using Rotated Surface Codes

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...

Quantum Transport in Scalable MBE SAG InSb Nanowires for Majorana Bound States: Developments in Selective Area Grown InSb Nanowires using Molecular Beam Epitaxy from Delft

Characterization of standard cell libraries in cryogenic applications

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...

Cryogenic CMOS supply voltage regulator for quantum computing applications

Quantum computers are able to deal with large problems, like molecular modelling, financial prediction and cryptography. A classical controller is used to control the qubits of the quantum computer. A proposed controller, operating at 4K, needs a clean voltage supply in order to function well. The long interconnects between the room temperature...

A Wide Temperature Range Voltage Reference for Quantum Computing Applications

Quantum computers seem very promising in solving problems that are too large to be solved by classical computers that are available today. However, to generate reasonable amounts of computing power, many qubits will be required. Each of the qubits has to be individually controlled and needs to be kept at cryogenic temperatures. To allow for the...

A CMOS Bandgap Temperature Sensor for Cryogenic Applications

Cryogenic temperature sensors are finding broadened applications. Such applications include: Cryosurgery [1.3], quantum computing, deep-space probes and planetary missions, satellite communications systems and space-based radar, ultra-high-speed/high sensitivity instrumentation systems, medical electronics (e.g. CT scanner), superconductor...