Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A terahertz molecular switch   We present time-dependent results describing the current through a molecular
device, modeled as a complex with two active centers connected to leads under
bias. We show that, at a properly adjusted external voltage, a passing
terahertz electromagnetic pulse may cause a transition between states of finite
and negligible current, suggesting that the system might be useful as a
nanoscopic switch in the terahertz range. A phase diagram defining the bias
region in which the transition takes place within a short time is given. As
described, the physical processes involved are of an entirely different nature
than those in ordinary photodetectors.

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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
5
The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
2
The categories of this paper are: math
29
The categories of this paper are: funct-an