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Accidental degeneracy

Term · Chemistry · MLC-T-CHM-000108

A situation where two or more distinct quantum states of a system have the same energy, even though they are not related by any inherent symmetry of the system. This degeneracy arises from specific values of parameters in the Hamiltonian. It can be lifted by perturbations to the system.

Table 1. Record
IdentifierMLC-T-CHM-000108
FieldChemistry
SubjectAnalytical Chemistry
ReferencesPAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 651 (https://doi.org/10.1515/pac-2019-0203)
Record as JSON 
{
  "id": "MLC-T-CHM-000108",
  "term": "Accidental degeneracy",
  "field": "Chemistry",
  "definition": "A situation where two or more distinct quantum states of a system have the same energy, even though they are not related by any inherent symmetry of the system. This degeneracy arises from specific values of parameters in the Hamiltonian. It can be lifted by perturbations to the system.",
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 651 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/accidental-degeneracy/"
}

Record 113 of 13,676 in Chemistry terminology (MLC-0109). Request the full dataset.