1,251 research outputs found
Economical (k,m)-threshold controlled quantum teleportation
We study a (k,m)-threshold controlling scheme for controlled quantum
teleportation. A standard polynomial coding over GF(p) with prime p > m-1 needs
to distribute a d-dimensional qudit with d >= p to each controller for this
purpose. We propose a scheme using m qubits (two-dimensional qudits) for the
controllers' portion, following a discussion on the benefit of a quantum
control in comparison to a classical control of a quantum teleportation.Comment: 11 pages, 2 figures, v2: minor revision, discussions improved, an
equation corrected in procedure (A) of section 4.3, v3: major revision,
protocols extended, citations added, v4: minor grammatical revision, v5:
minor revision, discussions extende
Multiparty Quantum Communication Using Multiqubit Entanglement and Teleportation
We propose a 2N qubit entangled channel that can be used to teleport N qubits in a network to a single receiver. We describe the structure of this channel and explicitly demonstrate how the protocol works. The channel can be used to implement a scheme in which all parties have to participate in order for the teleportation to be successful. This can be advantageous in various scenarios and we discuss the potential application of this protocol to voting
Quantum Logic Network for Probabilistic Teleportation of Two-Particle State of General Form
A simplification scheme of probabilistic teleportation of two-particle state
of general form is given. By means of the primitive operations consisting of
single-qubit gates, two-qubit controlled-not gates,
Von Neumann measurement and classically controlled operations, we construct
an efficient quantum logical network for implementing the new scheme of
probabilistic teleportation of a two-particle state of general form.Comment: 9 pages, 2 figure
Can the states of the W-class be suitable for teleportation
Entangled states of the W-class are considered as a quantum channel for
teleportation or the states to be sent. The protocols have been found by
unitary transformation of the schemes, based on the multiuser GHZ channel. The
main feature of the W-quantum channels is a set of non-local operators, that
allow receivers recovering unknown state.Comment: 4 pages, revtex4, no figure
Photonic entanglement as a resource in quantum computation and quantum communication
Entanglement is an essential resource in current experimental implementations
for quantum information processing. We review a class of experiments exploiting
photonic entanglement, ranging from one-way quantum computing over quantum
communication complexity to long-distance quantum communication. We then
propose a set of feasible experiments that will underline the advantages of
photonic entanglement for quantum information processing.Comment: 33 pages, 4 figures, OSA styl
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