Posts in
Accelerating quantum computer developments
- 21 July 2021
With Orange Quantum Systems, and our partners in the Dutch Quantum ecosystem we have published a paper in the special quantum industry issue of EPJ Quantum Technology on accelerating the development of quantum computers. In this paper, we present the product development approach and roadmap for quantum computers, based on superconducting circuits as an example.
Quantum Delft webinar on Quantify
- 22 April 2021
I gave a presentation at the Quantum Delft webinar on Quantify, and our work on running variational algorithms (VQE) on the Quantum Inspire. Quantify, is an open-source framework for operating quantum computers in the NISQ era developed by Orange Quantum Systems and Qblox
Uploading a package on PyPI
- 21 October 2020
These are some simple notes to remind myself how to upload a python package to PyPI. The full description on how to upload a package to PyPI can be found here.
Git basics
- 15 August 2020
A few years ago, I made a flowchart to serve as a reference for basic Git usage for the Casimir Programming Course. The flowchart is intended to serve as a reference for the novice who has learned about the basic concepts of Git. For a proper reference on Git, I would recommend the Pro Git book I hope this flowchart is helpful to some, enjoy!
How to deal with conflicting views
- 28 March 2020
Based on some of my former writing you may expect to find mostly technical articles here. However, I have always been interested in not just content (what) but also in form (how). The latter has led to an interest in business, leadership, and processes. Subjects which in my mind can no longer be completely separated from technical discussions. In this post I will reflect on the question: What do you do when you disagree with someone on e.g., a technical matter? This discussion is based on my personal experiences and views but I think the ideas can, to a large extent, be generalized. I am looking forward to your thoughts and comments. Let me know where there is a flaw in my reasoning, where the logic doesn’t apply or any other views you have on the matter.
Cryoscope featured on the cover of Applied Physics Letters
- 03 February 2020
Our paper presenting Cryoscope recently got published and is featured on the cover of Applied Physics Letters. Cryoscope is an in-situ technique which uses a qubit to accurately sample the flux pulses used to dynamically control its frequency. This measurement is key for determining the linear-dynamical distortion on the flux control line and later correcting it, as needed for high-fidelity two-qubit gates.
Quantum Computational Supremacy
- 31 October 2019
Last week Google and collaborators published a paper in which they claim to have achieved Quantum Supremacy , one of the major milestones in quantum computing. The idea of quantum supremacy is to use a programmable quantum device to perform a task that is out-of-reach for any classical computer Google claims to have solved a problem in seconds that would take tens of thousands of years on a state of the art supercomputer. The quantum supremacy experiment has been a long-standing milestone in the field of quantum computation, and as such, skepticism has arised; soon after publication of the article a group in IBM research has challenged the results [1].
Net-Zero two-qubit gate published in Physical Review Letters
- 18 September 2019
We have recently developed a new type of conditional-phase gate for transmon qubits providing several key improvements over standard flux-pulsing-based versions. The Net-Zero gate uses “leakage interference” to minimize leakage to non-computational states. The zero-average, bipolar shape of the pulse makes the gate robust to long timescale distortions in the flux control line and additionally provides an echo effect. We demonstrate a state-of-the-art conditional-phase gate of duration 40 ns achieving 99.1% fidelity and 0.1% leakage.
