Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Implementation of a two-qubit state by an auxiliary qubit on the
  three-spin system   The method for preparation of a two-qubit state on two spins-1/2 that
mutually interact through an auxiliary spin is proposed. The essence of the
method is that, initially, the three spins evolve under the action of an
external magnetic field during a predefined period of time. Then, the auxiliary
spin is measured by a monochromatic electromagnetic radiation that allows
obtaining a certain state of the remaining spins. We study the entanglement of
this state and obtain the condition for achieving the maximally entangled
state. The implementation of the method on the physical system of nuclear spins
of xenon difluoride is described. As a results, the conditions which allow
preparing the maximally entangled state on this system are obtained.

11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th