Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Halting Problem for Quantum Computers   We argue that the halting problem for quantum computers which was first
raised by Myers, is by no means solved, as has been claimed recently. We
explicitly demonstrate the difficulties that arise in a quantum computer when
different branches of the computation halt at different, unknown, times.

36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
2
The categories of this paper are: math
16
The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph