Quantum heating of a parametrically modulated oscillator: spectral signatures

Autor:	Dykman, M. I., Marthaler, M., Peano, V.
Rok vydání:	2010
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Statistical Mechanics Quantum Physics
Zdroj:	Phys. Rev. A 83, 052115 (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.83.052115
Popis:	We show that the noise spectrum of a parametrically excited nonlinear oscillator can display a fine structure. It emerges from the interplay of the nonequidistance of the oscillator quasienergy levels and quantum heating that accompanies relaxation. The heating leads to a finite-width distribution over the quasienergy, or Floquet states even for zero temperature of the thermal reservoir coupled to the oscillator. The fine structure is due to transitions from different quasienergy levels, and thus it provides a sensitive tool for studying the distribution. For larger damping, where the fine structure is smeared out, quantum heating can be detected from the characteristic double-peak structure of the spectrum, which results from transitions accompanied by the increase or decrease of the quasienergy. Comment: 11 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1012.3339 Zobrazit plný text záznamu View this record from Arxiv