Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measuring the entanglement of coupled spins by multiphoton interference   We propose an experimental method to measure the entanglement of coupled
spins, each in a separate quantum dot, by means of multiphoton interference
patterns generated through the scattering of two laser beams off the quantum
dots. We calculate the N-photon quantum correlations measured by N detectors on
an image plane. Using two perpendicular laser beams, either many correlation
measurements on a time ensemble or a single correlation measurement on a
spatial ensemble of the many-qubit state is sufficient to retrieve all the
possible amplitudes of a many-qubit state.

3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph