probability amplitude
Technical term in quantum mechanics; a complex number whose squared modulus gives a probability density.
In quantum mechanics, the state of a particle is described by a probability amplitude.
Wave function; a more general concept that encompasses probability amplitudes for all possible states of a system.
Probability density; the squared absolute value of the probability amplitude, representing the likelihood of finding a particle at a given point.
Compound of 確率 (probability) and 振幅 (amplitude), a calque from English 'probability amplitude'.