Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum channel-estimation with particle loss: GHZ versus W states   We consider quantum channel-estimation for depolarizing channels and
phase-flip channels extended by ancilla qubits and fed with a GHZ or W state.
After application of the channel one or several qubits can be lost, and we
calculate the impact of the loss on the quantum Fisher information that
determines the smallest uncertainty with which the parameters of these channels
can be estimated.

33
The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
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The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math