Quantum computing appears to be the new thing! Yet one needs to ask, where does the technology stand? At best today, the ratio between these two systems is 1:1. To make full use of the speedup which is exponential, quantum computers are only useful on certain problem-solving issues. The issue here is really how many superpositions the issue to be solved has so that any quantum processor can run indefinite processes in parallel.
Back to today’s applications. While there are implications for nearly every industry segment, the most advanced programs with some real-world benefits run within cybersecurity, synthetic biology, utility infrastructures, and electric vehicles (batteries).
Where do the real-time applications stand as of now? To situate yourself on a time scale, think about it this way: Though computing was possible in 1969, the first moon expedition was supported by IT systems that filled entire hangars. Today, the same technology can be embarked on a standard mobile phone. On the same scale, quantum computing is based on a few bits today—to make it work outside any laboratory and on a large scale will take a few more years. As of now, the most promising advances occur in the field of quantum-based data encryption.
For the people interested in the subject, pure play in the field of quantum computing are Arqit (ARQQ), IonQ (IONQ), Rigetti Computing (RGTI), D-Wave (QBTS). But remember, it took years for humanity to physically reach the moon and quantum computing will not happen overnight either.
Here’s a list of other companies that do quantum computing.