[cohomologo]

It's pretty easy. If your computer has enough ram to store a size 2^16 length complex vector (which is 2^20 bytes, or 1MB) than you can open up an ipython notebook and write code to apply quantum gates to it with no problem.

The problems start to set in if your RAM can't hold the wavefunction in memory (so around 28 qubits, which takes 2^32 bytes = 4GB of RAM.)

With specialized code and supercomputers you can get a little farther, but you will be fighting exponential growth, so not too much. The practical limit for classical computers is in the 40-50 qubit range.

[e12e]

> If your computer has enough ram to store a size 2^16 length complex vector (which is 2^20 bytes, or 1MB)

One megabyte was enough even for quantum computing! Wow. Bill Gates, what a visionary ;-)