Born probability rule
converts the amplitude of the normalized state on the measurement basis into a probability.
symbols, variables and units
|ψ : state; |i : orthogonal measurement basis; P(i): dimensionless probability.
applicable conditions and boundaries
state has been normalized and the basis is completely orthogonal; POVM is used for general measurements.
formula source code
The following is a copyable LaTeX expression.
P(i)=\lvert\langle i\mid\psi\rangle\rvert^2
Reference and Extended Learning
IBM Quantum Learning · Basics of Quantum Information ↗is organized according to model definition and assumptions. Please check actual conditions and original literature before engineering, research and clinical use.
Born ruleQuantum Measurement