Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A proof-of-principle demonstration of quantum microwave photonics   With the rapid development of microwave photonics, which has expanded to
numerous applications of commercial importance, eliminating the emerging
bottlenecks becomes of vital importance. For example, as the main branch of
microwave photonics, radio-over-fiber technology provides high bandwidth,
low-loss, and long-distance propagation capability, facilitating wide
applications ranging from telecommunication to wireless networks. With
ultrashort pulses as the optical carrier, huge capacity is further endowed.
However, the wide bandwidth of ultrashort pulses results in the severe
vulnerability of high-frequency RF signals to fiber dispersion. With a
time-energy entangled biphoton source as the optical carrier and combined with
the single-photon detection technique, a quantum microwave photonics method is
proposed and demonstrated experimentally. The results show that it not only
realizes unprecedented nonlocal RF signal modulation with strong resistance to
the dispersion associated with ultrashort pulse carriers but provides an
alternative mechanism to effectively distill the RF signal out from the
dispersion. Furthermore, the spurious-free dynamic range of both the nonlocally
modulated and distilled RF signals has been significantly improved. With the
ultra-weak detection and high-speed processing advantages endowed by the
low-timing-jitter single-photon detection, the quantum microwave photonics
method opens up new possibilities in modern communication and networks.

20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int