Standard Lemma guide

decoherence

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • UK: /diːkəʊˈhɪəɹəns/

1

noun

Meaning 1

Loss of quantum coherence (phase relation between the quantum states of particles) in a physical system as it interacts with its environment.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Qualifier: quantum mechanics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The normal condition of sensitiveness in a coherer; reversion to such condition.

Definition source: English Wiktionary via Wiktextract

Usage: countable, dated, uncountable

Topics: engineering, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

First attested 1902 (OED) in the electrical engineering sense "the resetting of a coherer." From decohere (also 1902) + -ence, representing the verbal noun (compare decohesion, decoherency). The quantum mechanics concept was introduced in 1970 by German physicist H. Dieter Zeh, writing in the journal Foundations of Physics.

Across languages

Translations

7 source translations are retained for this English entry.

  • Chinese Mandarin: 退相干 (tuìxiānggān) — loss of quantum coherence
  • Finnish: dekoherenssi — loss of quantum coherence
  • French: décohérence — loss of quantum coherence
  • Georgian: დეკოჰერენცია (deḳoherencia) — loss of quantum coherence
  • German: Dekohärenz — loss of quantum coherence
  • Polish: dekoherencja — loss of quantum coherence
  • Serbo-Croatian: dekoherencija — loss of quantum coherence