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Bell state

Bell state noun: one of a set of four entangled states, namely |Φ⁺⟩=1/√(|00⟩+|11⟩), |Φ⁻⟩=1/√(|00⟩-|11⟩), |Ψ⁺⟩=1/√(|01⟩+|10⟩), and |Ψ⁻⟩=1/√(|01⟩-|10⟩), where |xy⟩:=|x⟩⊗|y⟩; these are the simplest examples of entangled states.

Noun

Bell state (plural Bell states)

  1. (quantum information science) One of a set of four entangled states, namely |Φ⁺⟩=1/√(|00⟩+|11⟩), |Φ⁻⟩=1/√(|00⟩-|11⟩), |Ψ⁺⟩=1/√(|01⟩+|10⟩), and |Ψ⁻⟩=1/√(|01⟩-|10⟩), where |xy⟩:=|x⟩⊗|y⟩; these are the simplest examples of entangled states.

Forms of Bell state

pluralBell states

Origin of Bell state

Named after John Stewart Bell (1928–1990), Irish physicist.

Questions about Bell state

What does Bell state mean?
Bell state means one of a set of four entangled states, namely |Φ⁺⟩=1/√(|00⟩+|11⟩), |Φ⁻⟩=1/√(|00⟩-|11⟩), |Ψ⁺⟩=1/√(|01⟩+|10⟩), and |Ψ⁻⟩=1/√(|01⟩-|10⟩), where |xy⟩:=|x⟩⊗|y⟩; these are the simplest examples of entangled states.
What part of speech is Bell state?
Bell state is a noun.
What is the plural of Bell state?
The plural of Bell state is Bell states.

Words near Bell state in the dictionary

  1. Bell shot
  2. Bell shots
  3. bell sleeve
  4. bell sleeves
  5. bell sniff
  6. Bell state
  7. Bell states
  8. bell tent
  9. bell tents
  10. bell the cat
  11. bell tower

Source and license

Adapted from Wiktionary: Bell state (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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