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2015 ; 5
(ä): 15816
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Physical realization of the Glauber quantum oscillator
#MMPMID26522653
Gentilini S
; Braidotti MC
; Marcucci G
; DelRe E
; Conti C
Sci Rep
2015[Nov]; 5
(ä): 15816
PMID26522653
show ga
More than thirty years ago Glauber suggested that the link between the reversible
microscopic and the irreversible macroscopic world can be formulated in physical
terms through an inverted harmonic oscillator describing quantum amplifiers.
Further theoretical studies have shown that the paradigm for irreversibility is
indeed the reversed harmonic oscillator. As outlined by Glauber, providing
experimental evidence of these idealized physical systems could open the way to a
variety of fundamental studies, for example to simulate irreversible quantum
dynamics and explain the arrow of time. However, supporting experimental evidence
of reversed quantized oscillators is lacking. We report the direct observation of
exploding n?=?0 and n?=?2 discrete states and ?0 and ?2 quantized decay rates of
a reversed harmonic oscillator generated by an optical photothermal nonlinearity.
Our results give experimental validation to the main prediction of irreversible
quantum mechanics, that is, the existence of states with quantized decay rates.
Our results also provide a novel perspective to optical shock-waves, potentially
useful for applications as lasers, optical amplifiers, white-light and X-ray
generation.
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