Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How to Project onto an Arbitrary Single-Photon Wavepacket   The time-frequency degree of freedom of the electromagnetic field is the
final frontier for single-photon measurements. The temporal and spectral
distribution a measurement retrodicts (that is, the state it projects onto) is
determined by the detector's intrinsic resonance structure. In this paper, we
construct ideal and more realistic positive operator-valued measures (POVMs)
that project onto arbitrary single-photon wavepackets with high efficiency and
low noise. We discuss applications to super-resolved measurements and quantum
communication. In doing so we will give a fully quantum description of the
entire photo detection process, give prescriptions for (in principle)
performing single-shot Heisenberg-limited time-frequency measurements of single
photons, and discuss fundamental limits and trade-offs inherent to
single-photon detection.

9
The categories of this paper are: nlin
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org