1) They're entangled
2) A single qubit does not simply have on/off state, but instead its state is represented by two complex numbers
Point 1 is pretty crucial to quantum computing as far as I understand.
But point 2: this means that the state of a single qubit cannot be represented by an integer, but requires two complex numbers (and k entangled qubits require 2^k complex numbers)?
The question is: what precision is needed for the complex numbers (their real components), if you were to simulate qubits on a conventional computer?
Edited by Lode, 17 December 2012 - 03:09 PM.