4,181 research outputs found
Effects of depolarizing quantum channels on BB84 and SARG04 quantum cryptography protocols
We report experimental studies on the effect of the depolarizing quantum
channel on weak-pulse BB84 and SARG04 quantum cryptography. The experimental
results show that, in real world conditions in which channel depolarization
cannot be ignored, BB84 should perform better than SARG04.Comment: 4 pages, 4 figure
On the impossibility of sustainable growth in a manufacturing based economy
This paper investigates a possibility of sustainable growth in a
multi-output endogenous growth framework where the capital
accumulation takes place mainly through the production of the
dirty manufactured goods. It is shown that in a closed economy,
economic growth is not environmentally sustainable, even under
an optimal pollution tax unless the consumption elasticity of substitution
between clean and dirty goods approaches infinity as in
a small open economy which exports dirty goods. There exists a
minimal threshold level of the ratio of clean to dirty capital that
ensures sustainable growth in a closed economy
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