Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-Qubit State Tomography using a Joint Dispersive Read-Out   Quantum state tomography is an important tool in quantum information science
for complete characterization of multi-qubit states and their correlations.
Here we report a method to perform a joint simultaneous read-out of two
superconducting qubits dispersively coupled to the same mode of a microwave
transmission line resonator. The non-linear dependence of the resonator
transmission on the qubit state dependent cavity frequency allows us to extract
the full two-qubit correlations without the need for single shot read-out of
individual qubits. We employ standard tomographic techniques to reconstruct the
density matrix of two-qubit quantum states.

9
The categories of this paper are: nlin
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph