3 ms·

The latter claim is not true. Quantum computers exist, but with lower capabilities than classical ones due to few numbers of entangled qubits.

• jkabrg 8y ago
  It's not guaranteed that the current hardware will scale to many more qubits. And they haven't passed the threshold to "quantum supremacy".
  • Robotbeat 8y ago
    Sure (although it's likely), but I don't think it's fair to call quantum computing hardware entirely theoretical at this point.