the electronic conductance at zero temperature through a quantum wire with side-connected asymmetric quantum ring (as a scatter system) is theoretically studied using the non-interacting hamiltonian anderson tunneling method. in this paper we concentrate on the configuration of the quantum dot rings. we show that the asymmetric structure of qd-scatter system strongly influences the amplitude an...

the comparison of growth processes and fluorescent properties of cdznte semiconductor quantum dots that are synthesized in different concentrations of zn2+ in water are discussed in this paper. the samples are characterized through absorbtion (uv) and photoluminescence spectra (pl). the results show that when the reaction time is prolonged, the absorption peak and fluorescent emission peak pres...

in this work, we report, optical properties of cd1-xsnxte quantum dots (x= 0.05, 0.10 and 0.15) synthesized in water using thioglycolic acid (tga) as a modifier agent. the optical characterization of the samples was performed through absorption (uv) and photoluminescence spectra (pl). a red shift absorption and fluorescent emission peaks was observed which can be related to the increase of nano...

A spring-loaded mechanism can explain the activation process for a protein that has a crucial role in maintaining the genomic integrity of immature eggs cells.

Quantum correlation of two-photon states has been utilized to suppress the environmental noise in imaging down single-photon level. However, size coherence area photon pairs limits applications quantum based on spatial correlations. Here, we propose a scheme exploiting twisted with tunable spatial-correlation regions circumvent this limitation. We employ bulk-density coincidence enhance signal....

In state-of-the-art quantum key distribution (QKD) systems, the main limiting factor in increasing generation rate is timing resolution detecting photons. Here, we present and experimentally demonstrate a strategy to overcome this limitation, also for high-loss long-distance implementations. We exploit intrinsic wavelength correlations of entangled photons using multiplexing generate secure fro...

Efficient coupling between a localized quantum emitter and a well defined optical channel represents a powerful route to realize single-photon sources and spin-photon interfaces. The tailored fiber-like photonic nanowire embedding a single quantum dot has recently demonstrated an appealing potential. However, the device requires a delicate, sharp needle-like taper with performance sensitive to ...

The research “From Pure Quantity to Quantum in Hegel's Science of Logic reconstructs the 1st chapter this session that poses problem passing from Quality Quantity. dialectic being-for-itself led quantitative unit is, initially, pure immediate quantity relation itself; result process brings immanent moments attraction and repulsion are now continuous discrete magnitude; these two contain each ot...