##  [Born Rule](/index.php/born-rule) 

  ##  [Born Rule](https://quantummech.quantumdictionary.io/born-rule-1) 

  

 [![Quantum Mechanics Dictionary](/sites/default/files/styles/large/public/2026-01/Quantum%20Mechanics.png.webp?itok=tC_FGCW0)](/index.php/topic-specific-dictionaries/modern-physics/quantum-mechanics)

- Modern Physics -

**Quantum Mechanics Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A quantum mechanics concept defining a model element, mathematical object, or experimental method used to predict measurable outcomes. It applies when required assumptions and definitions are specified and yields computable probabilities and expectation values. It does not ensure correctness without validation of approximations, numerical stability, and consistency of units and conventions.



 

 

 

 

 





 

 



 ##  [Born Rule](https://natural.quantumdictionary.io/born-rule-0) 

  

 [![Natural & Formal Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Natural%20%26%20Formal%20Sciences.png.webp?itok=2kCDRVQv)](/index.php/topic-specific-dictionaries/natural-formal-sciences)



**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

In this dictionary, the Born rule is the prescription that the probability of obtaining a particular measurement outcome equals the squared modulus of the amplitude (projection) of the system's wavefunction onto the outcome's eigenstate, after appropriate normalization.