To people who do quantum computing: are qubits (after error correction) functionally equivalent and hence directly comparable across quantum computers, and is it a useful objective measure to compare progress? Or is it more a easy-to-mediatise stat?
So .. what can you actually do with that thing?<p>Are there any real world applications yet? Or is the real world application, quantum state experiments?<p>I think we are pretty far from using it as a general purpose computer or even special (disrupting) usecases like factorization. So who could use it with benefit?
If anyone's looking for a clear and concise intro book, the best I've found is N. David Mermin's Quantum Computer Science. It's geared towards CS students, so very approachable, requires only familiarity with the basics of finite-dimensional complex vector spaces