Quantum Computing
Basic
Quantum State Space
Number of basis states an n-qubit register can be in superposition of simultaneously.
Formula
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MembersVariables
nNumber of qubits
2^nNumber of simultaneous basis states
Example
n = 50 qubits → 2⁵⁰ ≈ 10¹⁵ states at once
Did You Know?
A 300-qubit register could represent more states than there are atoms in the observable universe.
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More in Quantum Computing
View allQubit Superposition State
IntermediateGeneral state of a single qubit as a superposition of the computational basis states.
Normalisation Constraint
BasicThe squared amplitudes of a qubit must sum to 1, ensuring total probability is 100 %.
Hadamard Gate
IntermediatePuts a qubit into an equal superposition — the most common single-qubit gate.
Pauli-X Gate (Quantum NOT)
BasicFlips |0⟩ to |1⟩ and vice versa — the quantum equivalent of a classical NOT gate.
CNOT Gate
IntermediateTwo-qubit gate that flips the target qubit only when the control qubit is |1⟩.
Bell State (EPR Pair)
IntermediateMaximally entangled two-qubit state — measuring one qubit instantly determines the other.