Articles and videos
- Learning From Examples Using Quantum Annealing (Google Workshop on Quantum Biology) by (October 22nd, 2010) ► This talk spends more time on explaining that machine learning from samples is an optimisation issue, than describing how the algorithm is implemented on D-Wave chip.
- John Preskill: Quantum Computing and the Entanglement Frontier by (September 25th, 2013) ► How to build a quantum computer and how to deal with quantum entanglement.
- The Mathematics of Quantum Computers | Infinite Series by (February 16th, 2017) ► A basic introduction to quantum computers.
- Les Ordinateurs Quantiques by (April 7th, 2017) ► Another introduction to quantum computers.
- Trajectoires #11 - Novembre 2017 - « Informatique Quantique », avec Guillaume Aubrun by , , , and (November 21st, 2017) ► Some information about quantum computing and some counterintuitive properties of high dimensional space.
- Graduate Student Solves Quantum Verification Problem — Urmila Mahadev spent eight years in graduate school solving one of the most basic questions in quantum computation: How do you know whether a quantum computer has done anything quantum at all? by (October 8th, 2018) ► has designed a protocol to verify, with a classical computer, that a quantum computer has really performed what it is assumed to do.
- The Case Against Quantum Computing — The proposed strategy relies on manipulating with high precision an unimaginably huge number of variables by (November 15th, 2018) ► A very pessimistic view of the future of quantum computing: building a quantum computing able to perform interesting calculations is impossible because too complex.
- Computer Scientists Expand the Frontier of Verifiable Knowledge — The universe of problems that a computer can check has grown. The researchers’ secret ingredient? Quantum entanglement. by (May 23rd, 2019) ► Using entanglement allows to efficiently verify even more complex problems.
- L’ordinateur quantique devient un enjeu politique — Depuis plus de vingt ans, l’idée d’ordinateurs opérant sur des bits quantiques et non classiques, qui permettraient de faire des calculs aujourd’hui impossibles, stimule les imaginations et les recherches. S’est-on rapproché de l’objectif ? Le point avec Pascale Senellart-Mardon, physicienne à la frontière de la recherche fondamentale et de la technologie. by and (May 27th, 2019) ► An interview of who works on building an optical quantum computer.
- Quantum Supremacy Is Coming: Here’s What You Should Know — Researchers are getting close to building a quantum computer that can perform tasks a classical computer can’t. Here’s what the milestone will mean. (⧉) by (July 18th, 2019) ► A description of quantum supremacy.
- Why I Called It ‘Quantum Supremacy’ — Researchers finally seem to have a quantum computer that can outperform a classical computer. But what does that really mean? by (October 2nd, 2019) ► explains why he coined the term "quantum supremacy" and comments Google achievement.
- La Suprématie Quantique de Google by (November 5th, 2019) ► A description of Google’s achievement.
- La course aux bits quantiques — L’ordinateur quantique ne deviendra une réalité qu’après la mise au point de bits quantiques performants, rapides, robustes et intégrables à grande échelle. Plusieurs candidats sont en lice. Sans compter les outsiders surgis du diable vauvert. by (April 9th, 2020) ► An overview of the current quantum computer technologies.
- IBM now has 18 quantum computers in its fleet of weird machines — That's actually a lot given how expensive, finicky and complex quantum computers are. by (May 6th, 2020) ► Some information about IBM current status on quantum computing.
- Honeywell Claims It Has Most Powerful Quantum Computer — 6-qubit ion trap system hits a critical benchmark by (June 24th, 2020) ► The title says it all.
- Quantum Computing: Top Players 2021 by (May 15th, 2021) ► A list of the quantum computer technologies and some companies using each one.
- Google tries out error correction on its quantum processor — Two options for error correction both work, but current hardware limits them. by (July 14th, 2021) ► The error correction mechanisms are not really described, but it is clear that we are very far from having reliable quantum computations.
- Major Quantum Computing Strategy Suffers Serious Setbacks — So-called topological quantum computing would avoid many of the problems that stand in the way of full-scale quantum computers. But high-profile missteps have led some experts to question whether the field is fooling itself. by (September 29th, 2021) ► Some people have great expectations on building a quantum computer with Majorana zero-mode quasiparticles, but experimentations still fail to detect them.
- Superposition in Quantum Computers - Computerphile↓ by (October 26th, 2021) ► This is motly about harmonics, there is nothing about quantum computers.
- How Quantum Computers Will Correct Their Errors — Quantum bits are fussy and fragile. Useful quantum computers will need to use an error-correction technique like the one that was recently demonstrated on a real machine. by (November 16th, 2021) ► Some researchers have implemented Bacon-Shor error correction.
- IBM clears the 100-qubit mark with its new processor — Company says it's on track for 1,000+ qubits, useful computations in 2023. by (November 16th, 2021) ► IBM announced a quantum processor with 127 functional qubits.
- Math may have caught up with Google’s quantum-supremacy claims — But, given the rapidly evolving quantum computing landscape, that may not matter. by (November 23rd, 2021) ► Researchers found an algorithm to compute the problem used by Google to declare quantum supremacy, in realistic time on a traditional computer.
- Microsoft announces progress on a completely new type of qubit — Topological qubits don't exist yet, but the company is convinced they'll scale. by (March 15th, 2022) ► Microsoft is betting on the technology of topological qubits.
- The Quantum Hype Bubble Is About To Burst by (November 5th, 2022) ► The title says it all.
- IBM pushes qubit count over 400 with new processor — Milestone is important for the company's road map, less critical for performance. by (November 9th, 2022) ► IBM delivered the planned CPU, but this one is not fully usable because the error rate is still much too high.
- Google’s Sycamore chip: no wormholes, no superfast classical simulation either by (December 2nd, 2022) ► Debunking what many journalists wrote about researchers having created a holographic wormhole.
- What are companies doing with D-Wave’s quantum hardware? — D-Wave's computers are especially good at solving optimization problems. by (January 2nd, 2023) ► Two examples of using D-Wave quantum annealer.
- Google’s improved quantum processor good enough for error correction — The good news? It works. The bad news? It needs a lot of qubits. by (February 23rd, 2023) ► Google analysed the impact of using more hardware qubits per logical qubits: the error rate is marginally lower. We are still far from being able to perform real computations.
- IBM compensates for errors, gets usable results out of quantum processor — May be a way to squeeze useful work out before we get quantum error correction. by (June 14th, 2023) ► IBM uses classical computers to mitigate errors.
- Intel to start shipping a quantum processor — The 12-qubit device will go out to a few academic research labs. by (June 15th, 2023) ► Intel will work with some universities to improve its first quantum chip.
- Quantum Computing’s Hard, Cold Reality Check — Hype is everywhere, skeptics say, and practical applications are still far away by (December 22nd, 2023) ► The subtitle says it all.
- L’ordinateur quantique français enfin prêt ? REPORTAGE dans la start-up française Quandela (March 31st, 2025) ► A very basic presentation of quantum computing and Quandela’s technology.
- What Is the True Promise of Quantum Computing? — Despite the hype, it’s been surprisingly challenging to find quantum algorithms that outperform classical ones. In this episode, Ewin Tang discusses her pioneering work in “dequantizing” quantum algorithms — and what it means for the future of quantum computing. by , , and (April 3rd, 2025) ► has been able to challenge some claims that quantum algorithms are better than classical ones by improving these last ones.
- But what is quantum computing? (Grover's Algorithm) by (April 30th, 2025) ► A presentation of ’s algorithm.
- ↪Where my explanation of Grover’s algorithm failed by (May 4th, 2025) ► Some clarification about the previous video.
- New Quantum Algorithm Factors Numbers With One Qubit — The catch: It would require the energy of a few medium-size stars. by (June 9th, 2025) ► The title and subtitle say it all.
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quantum.country
- Quantum computing for the very curious↑ by and (March 18th, 2019) ► A good, sometimes verbose, introduction to quantum computing.
- How the quantum search algorithm works↑ by and (April 16th, 2019) ► A description of ’s algorithm.
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Shor’s Algorithm
- How to Break Cryptography | Infinite Series by (April 20th, 2017) ► An introduction to Shor’s algorithm (to factorise a number being the product of two unknown primes).
- ↪Hacking at Quantum Speed with Shor's Algorithm | Infinite Series by (April 28th, 2017) ► Some simplified explanation about how Shor’s Algorithm is implemented on a quantum computer.
- How Quantum Computers Break Encryption | Shor's Algorithm Explained by (May 1st, 2019) ► Another explanation.
- ↪How Shor's Algorithm Factors 314191 by (May 22nd, 2019) ► The continuation of the previous video.
- Exposing Why Quantum Computers Are Already A Threat by (March 20th, 2023) ► Still the same story.
- Thirty Years Later, a Speed Boost for Quantum Factoring — Shor’s algorithm will enable future quantum computers to factor large numbers quickly, undermining many online security protocols. Now a researcher has shown how to do it even faster. by (October 17th, 2023) ► The subtitle says it all.