2,084 research outputs found
Counter-polarized single-photon generation from the auxiliary cavity of a weakly nonlinear photonic molecule
We propose a scheme for the resonant generation of counter-polarized single
photons in double asymmetric cavities with a small Kerr optical nonlinearity
(as that created by a semiconductor quantum well) compared to the mode
broadening. Due to the interplay between spatial intercavity tunneling and
polarization coupling, by weakly exciting with circularly polarized light one
of the cavities, we predict strong antibunching of counter-polarized light
emission from the non-pumped auxiliary cavity. This scheme due to quantum
interference is robust against surface scattering of pumping light, which can
be suppressed both by spatial and polarization filters
Effects of a new triple- reaction rate on the helium ignition of accreting white dwarfs
Effects of a new triple-alpha reaction rate on the ignition of carbon-oxygen
white dwarfs accreting helium in a binary systems have been investigated. The
ignition points determine the properties of a thermonuclear explosion of a Type
Ia supernova. We examine the cases of different accretion rates of helium and
different initial masses of the white dwarf, which was studied in detail by
Nomoto. We find that for all cases from slow to intermediate accretion rates,
nuclear burnings are ignited at the helium layers. As a consequence, carbon
deflagration would be triggered for the lower accretion rate compared to that
of which has been believed
to the lower limit of the accretion rate for the deflagration supernova.
Furthermore, off-center helium detonation should result for intermediate and
slow accretion rates and the region of carbon deflagration for slow accretion
rate is disappeared.Comment: 4 pages, 2 figure
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