Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum computer with atomic logical qubits encoded on macroscopic
  three-level systems in common quantum electrodynamic cavity   We propose an effective realization of the universal set of elementary
quantum gates in solid state quantum computer based on macroscopic (or
mesoscopic) resonance systems - multi-atomic coherent ensembles, squids or
quantum dots in quantum electrodynamic cavity. We exploit an encoding of
logical qubits by the pairs of the macroscopic two- or three-level atoms that
is working in a Hilbert subspace of all states inherent to these atomic
systems. In this subspace, logical single qubit gates are realized by the
controlled reversible transfer of single atomic excitation in the pair via the
exchange of virtual photons and by the frequency shift of one of the atomic
ensembles in a pair. In the case of two-level systems, the logical two - qubit
gates are performed by the controlling of Lamb shift magnitude in one atomic
ensemble, allowing/blocking the excitation transfer in a pair, respectively,
that is controlled by the third atomic system of another pair. When using
three-level systems, we describe the NOT-gate in the atomic pair controlled by
the transfer of working atomic excitation to the additional third level caused
by direct impact of the control pair excitation. Finally, we discuss advantages
of the proposed physical system for accelerated computation of some useful
quantum gates.

6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an