# Level repulsion

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'''Level repulsion''' is the [quantum mechanical](/source/quantum_mechanical) equivalent to a repulsion effect in [oscillator](/source/oscillator)s.<ref name="Frankvon Brentano1994">{{cite journal|last1=Frank|first1=Winfried|last2=von Brentano|first2=Peter|title=Classical analogy to quantum mechanical level repulsion|journal=American Journal of Physics|volume=62|issue=8|year=1994|pages=706–709|issn=0002-9505|doi=10.1119/1.17500}}</ref> A system of two coupled oscillators has two natural frequencies. As the coupling strength between the oscillators increases, the lower frequency decreases and the higher increases.<ref name="Novotny2010">{{cite journal|last1=Novotny|first1=Lukas|title=Strong coupling, energy splitting, and level crossings: A classical perspective|journal=American Journal of Physics|volume=78|issue=11|year=2010|pages=1199–1202|issn=0002-9505|doi=10.1119/1.3471177}}</ref>

==See also==
* [Avoided crossing](/source/Avoided_crossing)
* [Intersubband polariton](/source/Intersubband_polariton)
* [Wigner&ndash;Ville distribution](/source/Wigner%26ndash%3BVille_distribution)

==References==
{{Reflist}}

Category:Quantum mechanics

{{Quantum-stub}}

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