Quantum Engineering Colloquium


1. Yuanxing (Alice) Xu,  TU Delft, The Netherlands -- 06-12-2017

2. Xiang Fu, TU Delft, The Netherlands -- 06-12-2017


 1.   DC voltage control electronics integrated with Si/SiGe based quantum dots

A large number of physical qubits are required to make the computational capability of a quantum computer appealing with respect to the classical one. In order to reduce the number of wires which conduct heat between the mK stage and higher temperature stages in the dilution refrigerator, we propose a structure of a capacitor in series of a MOS switch to supply DC bias voltage to quantum dots, in combination with the de-multiplexer to address them. In this talk, I will present the monolithic fabrication process of the DC voltage control electronics with Si/SiGe based quantum dots, followed by methods to monitor the device quality and some recent results in the end.   

2. Fully Programmable Quantum Experiment based on a Quantum Instruction Set Architecture using the eQASM compiler

To date, research in quantum computer engineering has focused primarily at programming languages, compilers, and quantum hardware. Relatively little attention has been given to using the compiler output to fully control the operations on experimental quantum processors. Bridging the gap, we proposed a quantum microarchitecture, named QuMA, which is implemented in QuTech Control Box. In an updated version, we proposed a quantum instruction set architecture, named eQASM, which is implemented in QuTech Central Controller-Light and enables precise timing control, single-qubit-multi-qubit (SOMQ) execution and explicit parallelism specification. Both QuMA and eQASM are verified by performing single- and two-qubit experiments on a superconducting quantum processor, of which the instructions are generated by an eQASM compiler OpenQL from a high-level language description.





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