Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2006-11-10
Physical Review Letters 98 (2007) 103602
Physics
Condensed Matter
Other Condensed Matter
Scientific paper
We develop a general theory of the quantum vacuum radiation generated by an arbitrary time-modulation of the vacuum Rabi frequency for an intersubband transition of a doped quantum well system embedded in a semiconductor planar microcavity. Both non-radiative and radiative losses are included within an input-output quantum Langevin framework. The intensity and the main spectral signatures of the extra-cavity emission are characterized as a function of the amplitude and the frequency of the vacuum modulation. A significant amount of photon pairs, which can largely exceed the black-body radiation in the mid and far infrared, is shown to be produced with realistic parameters. For a large amplitude resonant modulation, a parametric oscillation regime can be also achieved.
Carusotto Iacopo
Ciuti Cristiano
Liberato Simone de
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