In the last couple of weeks there have been a bunch of press releases about Microsoft’s soon-to-be-released quantum computing programming language, plus related articles from IBM, Google, and others. China is also getting press for using quantum effects to help secure satellite communication — wow!
The technology sounds fascinating, and it’s amazing that hardware and software for quantum computing is started to actually appear. I remember reading science fiction books as a child that mentioned quantum computing as a super-theoretical concept, and I never imagined it would manifest as reality so soon. I’m still trying to scratch the surface of understanding how these systems work, so my goal is to read, learn, and summarize my understanding about quantum computing in this space and how it will open opportunities for software developers. While I may never understand the mathematics fully, I don’t feel so bad — Bill Gates and Satya Nadella struggle with the concepts as well. I welcome any comments and feedback to help me improve my understanding.
My first instinct is to say that it seems like quantum computing will not completely replace classical computing — instead, they will co-exist. Classical computing is deterministic, which is wonderful. I want to know that the e-mail I send will get delivered. Quantum computing, on the other hand, seems to deal with probabilities. It seems better suited to modeling and simulation of real-world phenomenon, or areas where some fuzziness or randomness are beneficial (like cryptography). Many articles state things like “N qubits can exist in the superposition of all 2^N states at the same time“. But you don’t know which state they are in until you “see” one (or more?), at which point via entanglement you can see what states the other qubits are in. How that helps computationally, I don’t quite grasp yet, nor do I truly understand the practical implications of quantum computing (disregarding all the marketing-speak)…so more reading for me!