Very excited to show off our IDE Triple Alpha as we move towards early access. - BASIC-like and assembly-like quantum programming.- Turing complete (goodbye circuits!).- Quantum subroutines from C/C++ (!!!).- Supports ~ any instruction set.- Run once, deploy or resource count.

As the current president, I’m obviously completely unbiased, but member companies are doing some really cool stuff, from post-quantum cryptography, to gravitometry, to launching satellites to enable long range quantum communication. Find out more at

We had the first in person meet-up tonight for the Southeast Asia Quantum Industry Association (SEAQIA). Great to have quantum computing, quantum communications and quantum sensing all represented.

@horizon_quantum There are of course other ways to divide things up, to talk about noise, fault-tolerance etc, but I find this taxonomy useful as it relates to the capabilities of the systems in a way that is stable as knowledge changes (e.g. noise thresholds shift).

A major difference in how we approach quantum computing at @horizon_quantum is that we focus on building tools to program Type 4 and Type 5 systems, and building the software infrastructure to emulate these systems even with Type 1 and Type 2 hardware, expanding what is possible.

Finally, Type 5 quantum computers are Type 4 systems augmented with the ability to perform quantum communication to other systems, allowing for networked quantum computing applications (such as blind quantum computing, pooling computational resources etc).

Type 4 quantum computers are the most general form of stand-alone quantum computer. They allow for interacting classical and quantum computation, where the quantum operations are being determined by, and returning results to, a classical control computer on the fly.

Type 3 quantum computers are systems that allow quantum circuits to contain operations dependent on measurement results, but which do not allow for general control flow. This allows teleportation and limited error correction and measurement-based computation.

Type 2 quantum computers are systems which combine a Type 1 quantum computer with a classical computer which determines the circuits to be evaluated. This is commonly known as hybrid quantum computing, and is widely used for NISQ variational algorithms such as QAOA and VQE.

Type 1 quantum computers are systems that can evaluate arbitrary quantum circuits. These run through instructions like a recipe, with no control flow or classical controlled operations. If the noise were low enough, these could implement the quantum part of Shor's algorithm.

Type 0 quantum computers are systems that implement non-universal models. These exploit quantum effects to tackle certain problems, but aren't capable of implementing general quantum circuits or Shor's algorithm. Examples include annealers and boson samplers.

On a webinar with QuEra earlier in the week, I spoke a little about how we think about quantum computers at @horizon_quantum. I want to recap it here, since people often mean very different things when use the term "quantum computer". Below is a simple taxonomy I use.

(reposted to fix a typo).

From the very beginning, we've built our tools to target as broad a range of quantum computers as possible. We're excited to soon add neutral atoms to the list, along side trapped ions, superconducting qubits and measurement-based architectures.

If you’re considering joining the team, it’s not all work. We managed to squeeze in a murder mystery evening and an ice-cream van serving 99s.

Ireland was for our company offsite. Great chance for new joiners to meet everyone. Lots of planning sessions and briefings to prepare for life as a public company. We had time for an internal hackathon with Triple Alpha. Fun to see the ideas non-physicists come up with to try.

Finally heading back to Singapore after 6 straight weeks of work travel:.SG -> Ireland -> SF -> Dublin -> NY -> Alberta -> DC -> Colorado -> SF -> NY -> SG.

I know people who have dropped out of college have started some enormously successful companies, but the downside risk is huge. I felt free to take the risk to give up tenure and dive in precisely because I wasn’t worried about my ability to find a job if things went badly.

I’m glad to see some sensible advice on this. I started full time in Horizon just after turning 37, and I was able to build the company primarily because I had gone through college and grad school and spent years doing research to become expert in an emerging technology.

Great to see news of @rigetti hitting performance milestones with their new 36 qubit chip. Horizon Quantum was the third customer for Rigetti’s Novera QPU, just behind Fermilab and the US Air Force, so I’m excited to see the chiplet systems emerging.

Listening to Flash Boys on audiobook, it’s just struck me that it can’t be long before high frequency traders start using strategies that exploit entanglement. The hardware is already doable, and strategies don’t seem hard to find (took me about an hour to find a toy one).