Definition

1. Verb (Transitive):
   • To apply the principles of quantum theory to a system or quantity, restricting its possible values or states to specific discrete levels that are integer multiples of a fundamental unit.
   • To approximate a continuously varying analog signal by converting it into a digital form, where its amplitude is represented by a limited set of discrete numerical values.

Usage and Examples

• Verb:
  • Scientists seek to quantise gravity to unify it with the other fundamental forces.
  • The first step in digital audio processing is to quantise the analog sound wave.
  • The energy levels of an electron in an atom are quantised.

Advanced Usage

• "Quantised" (Adjective): Describing a system or quantity that has been restricted to discrete values.
  • The quantised nature of light energy explains the photoelectric effect.
• In Computing & Signal Processing: The process of mapping a large set of input values to a smaller set of output values (e.g., in image compression or analog-to-digital conversion).
  • The algorithm will quantise the color palette to reduce the file size.

Variants and Related Words

• Quantisation (Noun, chiefly British English): The process or result of quantising.
  • The quantisation of charge was a groundbreaking discovery.
• Quantization (Noun, chiefly American English): The American English spelling of 'quantisation'.
• Quantiser/Quantizer (Noun): A device or algorithm that performs quantisation.
• Quantifiable (Adjective): Able to be expressed or measured as a quantity. (Note: This is a related but distinct concept).

Synonyms

• Digitize (specifically for the signal processing meaning): To convert analog data into digital form.
• Discretize: To convert a continuous system or function into a discrete counterpart.

Antonyms

• Analogize: To represent or treat as analog or continuous.
• Continuize: To make continuous (a less common term).

Related Technical Phrases

• Quantisation Error/Noise: The difference between the original analog signal and its quantised digital representation, perceived as distortion.
  • A higher bit depth reduces quantisation noise in the recording.
• Quantise to a Grid (in music/audio software): To align musical notes or rhythmic events to a predefined temporal grid.
  • You can quantise the drum hits to perfect the timing.

Verb

1. apply quantum theory to; restrict the number of possible values of (a quantity) or states of (a physical entity or system) so that certain variables can assume only certain discrete magnitudes that are integral multiples of a common factor
   • Quantize gravity
2. approximate (a signal varying continuously in amplitude) by one whose amplitude is restricted to a prescribed set of discrete values