Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum State Tomography: 'the best' is the enemy of 'good enough'   In this paper, we examine a variety of strategies for numerical quantum-state
estimation from data of the sort commonly measured in experiments involving
quantum state tomography. We find that, in some important circumstances, an
elaborate and time-consuming numerical optimization to obtain 'the best'
density matrix corresponding to a given data set is not necessary, and that
cruder, faster numerical techniques may well be 'good enough'.

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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an