Parametrically driven nonlinear oscillator at a few-photon level

Autor:	T. V. Gevorgyan, G. Yu. Kryuchkyan
Rok vydání:	2013
Předmět:	Josephson effect Physics Quantum decoherence Fock state Photon Quantum dynamics Quantum mechanics Anharmonicity Degenerate energy levels Atomic and Molecular Physics and Optics Fock space
Zdroj:	Journal of Modern Optics. 60:860-868
ISSN:	1362-3044 0950-0340
DOI:	10.1080/09500340.2013.818256
Popis:	We consider quantum dynamics of a parametrically driven anharmonic oscillator (PDAO) at a few-photon level. In this scheme the oscillatory mode is excited through the degenerate down-conversion process. This scheme could be experimentally realized in superconducting solid-state devices based on the nonlinearity of the Josephson junction or in cooled nano-mechanical oscillators. We investigate PDAO in the strong quantum regime that means strong Kerr-nonlinearity of the mode with respect to the mode’s dissipation for two cases of excitations: by a monochromatic driving field or by a train of Gaussian pulses. We demonstrate production of the nonclassical oscillatory states with two-fold symmetry in phase-space which are approximately close to the lower pure Fock states. Production of the superposition of the Fock states for time-intervals exceeding the characteristic time of decoherence and dissipation is also shown.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0f92235f3e13f9cceb323fe791bd3fbb https://doi.org/10.1080/09500340.2013.818256 Zobrazit plný text záznamu