Interesting. I know 2500 is far from current 28 qubit but it still scares me a little. Not long ago I've read about 11-qubit quantum computer. How long do you think it will take to develop 2500 qubit computer? I hope Moore's law doesn't apply here.
Well, a qubit is like a normal bit in the way it holds information. 1 qubit can have two values like 1 bit, 2 qubits can hold double that so 2500 qubits is going to hold 2^2500 units of information which is way more than what today's 64-bit computers can hold. For reference, 64-bit memory can theoretically hold 8 exabytes of data. But quantum computers like the 28-qubit one need enormous tower cases to keep the temperature at absolute zero. I read somewhere that a 2500 qubit computer would have to be as large as a soccer field so that would have to be a very large and long-term project which would take a decade or two to make.