Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantification of Concurrence via Weak Measurement   Since entanglement is not an observable per se, measuring its value in
practice is a difficult task. Here we propose a protocol for quantifying a
particular entanglement measure, namely concurrence, of an arbitrary two-qubit
pure state via a single fixed measurement set-up by exploiting so-called weak
measurements and the associated weak values together with the properties of the
Laguerre-Gaussian modes. The virtue of our technique is that it is generally
applicable for all two-qubit systems and does not involve simultaneous copies
of the entangled state. We also propose an explicit optical implementation of
the protocol.

17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org