What is a qubit?
A classical bit is 0 or 1. A qubit holds two numbers called amplitudes, written α|0⟩ + β|1⟩. Both of them can be non-zero at the same time.
|ψ⟩ = α|0⟩ + β|1⟩Experimental quantum interfaceEst. 2026 / V.01
Somewhere between zero and one
QBIT
[ STATE: UNDEFINED ]
Not quite here.
Not quite gone.
α|0⟩ + β|1⟩
All possibilities.
Until observed.
Let a thought become a signal.
Real mathematics. Quantum possibilities. A little uncertainty.
Try a signal
01 / The observatory
Collapse the question.
Keep the possibility.
A quiet place for exact answers.
Math engine ready
QBIT / Local expression engine
Awaiting your first signal.
No question is too small.
Computed locally · Not generated by AI
Quantum basics / For beginners
Learn the math, one signal at a time.
Ten short ideas, each with its formula and a real calculation you can run in the console.
The probability rule
Square an amplitude to get the chance of measuring that outcome. Do it to both amplitudes and the two chances always add up to 100%.
P(0) = |α|², P(1) = |β|²Hadamard (H)
The gate that creates a superposition: it turns a definite 0 into an even mix of 0 and 1. Apply it a second time and the two halves cancel back to 0.
H|0⟩ = (|0⟩ + |1⟩) / √2Pauli X
The quantum NOT. It swaps the two amplitudes, so a state that was certainly 0 becomes certainly 1.
X|0⟩ = |1⟩02 / Possible futures
Choose a different state.
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WxsiQzWGsGCgar3vDog6v3uoWLngK8KREYzm8qepump