Sharp tunneling peaks in a parametric oscillator: quantum resonances missing in the rotating wave approximation

We describe a new mechanism of tunneling between period-two vibrational states of a weakly nonlinear, parametrically modulated oscillator. The tunneling results from resonant transitions induced by the fast oscillating terms conventionally disregarded in the rotating wave approximation (RWA). The tu...

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Veröffentlicht in:Physical review letters 2012-08, Vol.109 (9), p.090401-090401, Article 090401
Hauptverfasser: Peano, V, Marthaler, M, Dykman, M I
Format: Artikel
Sprache:eng
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Zusammenfassung:We describe a new mechanism of tunneling between period-two vibrational states of a weakly nonlinear, parametrically modulated oscillator. The tunneling results from resonant transitions induced by the fast oscillating terms conventionally disregarded in the rotating wave approximation (RWA). The tunneling amplitude displays resonant peaks as a function of the modulation frequency; near the maxima it is exponentially larger than the RWA tunneling amplitude.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.109.090401