Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temporal Quantum-State Tomography of Narrowband Biphotons   We describe and demonstrate a quantum state tomography for measuring the
complex temporal waveform of narrowband biphotons. Through six sets of
two-photon interference measurements projected in different polarization
subspaces, we can construct the time-frequency entangled two-photon joint
amplitude and phase functions in continuous-variable time domain. For the first
time, we apply this technique to experimentally determine the temporal quantum
states of narrowband biphotons generated from spontaneous four-wave mixing in
cold atoms, and fully confirm the theoretical predictions.

9
The categories of this paper are: nlin
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th