Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Faithful conversion of propagating quantum information to mechanical
  motion   We convert propagating qubits encoded as superpositions of zero and one
photons to the motion of a micrometer-sized mechanical resonator. Using quantum
state tomography, we determine the density matrix of both the propagating
photons and the mechanical resonator. By comparing a sufficient set of states
before and after conversion, we determine the average process fidelity to be
$F_{\textrm{avg}} = 0.83\substack{+0.03-0.06}$ which exceeds the classical
bound for the conversion of an arbitrary qubit state. This conversion ability
is necessary for using mechanical resonators in emerging quantum communication
and modular quantum computation architectures.

7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org