Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relational quantum computing using only maximally mixed initial qubit
  states   We disprove the conjecture of [1], namely that it would require smarter
authors to find a way of making the two-qubit singlet/triplet measurement
quantum computationally universal given an ensemble of initial single qubit
states with less than three linearly independent Bloch vectors. We show, in
fact, that an initial ensemble of maximally mixed single qubits suffices.

35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
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The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys