Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deterministic Joint Remote Preparation of a Four-qubit Cluster-type
  State via GHZ states   A scheme for the deterministic joint remote preparation of a four- qubit
cluster-type state using only two Greenberger-Horne-Zeilinger (GHZ) states as
quantum channels is presented. In this scheme, the first sender per- forms a
two-qubit projective measurement according to the real coefficient of the
desired state. Then, the other sender utilizes the measurement result and the
complex coefficient to perform another projective measurement. To obtain the
desired state, the receiver applies appropriate unitary operations to his/her
own two qubits and two CNOT operations to the two ancillary ones. Most
interestingly, our scheme can achieve unit success probability, i.e., Psuc=1.
Furthermore, comparison reveals that the efficiency is higher than that of most
other analogous schemes.

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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: econ