Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Fundamental Lower Bound of Actuating Energy for Broadband Photon
  Switching   We derive a universal lower bound of actuating energy $E_{s}$ for broadband
photon switching by using an uncertainty relation between time and the negative
energy density of quantum fields. We find that broadband photon switching
between perfect reflection and perfect transmission over a time $t_s$ should
satisfy $E_{s}\geq\frac{\hbar}{6\pi t_s}$.

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The categories of this paper are: hep-th
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The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: physics
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The categories of this paper are: eess
30
The categories of this paper are: q-alg
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The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg