2,504 research outputs found
Volume holographic interconnections with maximal capacity and minimal cross talk
Optical interconnections utilizing volume holography are described. Intrinsic cross-talk effects that limit the number of independent interconnections are identified and analyzed by applying coupled-wave analysis. Sampling grids for removing the first-order cross talk are presented, resulting in a system limited by second- and third-order cross talk only
Effects of chloride concentration on microstructure of cement pastes by AC impedance spectroscopy HU
Alternating current (AC) impedance spectroscopy has been applied in characterizing
microstructural evolution and electrochemical properties of cement-based systems. In the present
paper, an equivalent circuit model was proposed to study the influences of chloride binding on
microstructure and solid-liquid interfacial properties of cement paste. Chloride concentration index of
pore solution was measured to correlate to the parameters in equivalent circuit model corresponding
to electrical double layer at solid-liquid interface. The results showed that the parameters of
equivalent circuit model can properly indicate the microstructure and interfacial properties of cement
paste. Resistance of continuous pores was gradually decreased with chloride concentration in soaking
solution due to the higher conductivity of pore solution. The capacitance of electrical double layer was
increased with chloride concentration in pore solution due to more content of chloride ions in
electrical double layer. While the thickness of electrical double layer was decreased as chloride
concentration increased, which is in agreement with mathematical calculation
Teleporting a rotation on remote photons
Quamtum remote rotation allows implement local quantum operation on remote
systems with shared entanglement. Here we report an experimental demonstration
of remote rotation on single photons using linear optical element. And the
local dephase is also teleported during the process. The scheme can be
generalized to any controlled rotation commutes with .Comment: 5 pages, 4 figure
- …