Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theoretical study of the quantum noise in phase-sensitive heterodyne
  detection with a bichromatic local oscillator   A traditional heterodyne detector, as a phase-insensitive device, suffers the
well-known 3 dB noise penalty caused by image sideband vacuum. In contrast, a
heterodyne detector with a bichromatic local oscillator, as a phase-sensitive
device, should be exempted from the 3 dB noise penalty, in spite of the
existence of the image sideband vacuum. Assuming coherent light at the input,
we develop in this work a theory to describe the quantum nature of the
phase-sensitive heterodyne detector, in a good agreement with experiment. The
absence of the quantum noise of the image vacuum modes in the heterodyne
detector may be explained by that the studied detector senses only a single
field of light, i.e., the signal field, according to the theory developed.

30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg