CLASSICAL.
GitHub
CONTROL CENTER
BEFORE QUANTUM, THERE WAS CLASSICAL.

Classical vs. quantum.

Not a rivalry. A closer look at two ways to compute, the cryptography we depend on, and the work still ahead.

CLASSICAL

Definite bits. Useful machines.

Classical computers operate on bits with definite values. From web servers to GPU clusters, they perform the arithmetic, logic, and storage behind today’s digital infrastructure.

Try binary arithmetic below, or run the sieve of Eratosthenes in the terminal.

Run a real computation
QUANTUM

Real physics. Different capabilities.

Quantum processors manipulate quantum states using gates, interference, and entanglement. Quantum computers exist today, but reliable large-scale fault-tolerant computation remains an engineering challenge.

Shor’s algorithm can factor integers in polynomial time on a sufficiently capable quantum computer. It does not make every computational problem easy.

EXPLANATION / NOT A QUANTUM SIMULATION

Eight bits. 256 possibilities.

INTERACTIVE / BINARY REGISTER

Flip any bit to change the register. Each bit contributes its positional weight to the actual decimal value computed below.

128
64
32
16
8
4
2
1
01000001→65DECIMAL