14 research outputs found
Quantum dense coding in multiparticle entangled states via local measurements
In this paper, we study quantum dense coding between two arbitrarily fixed
particles in a (N+2)-particle maximally-entangled states through introducing an
auxiliary qubit and carrying out local measurements. It is shown that the
transmitted classical information amount through such an entangled quantum
channel usually is less than two classical bits. However, the information
amount may reach two classical bits of information, and the classical
information capacity is independent of the number of the entangled particles in
the initial entangled state under certain conditions. The results offer deeper
insights to quantum dense coding via quantum channels of multi-particle
entangled states.Comment: 3 pages, no figur
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
Quantum logic networks for probabilistic and controlled teleportation of unknown quantum states
We present simplification schemes for probabilistic and controlled
teleportation of the unknown quantum states of both one-particle and
two-particle and construct efficient quantum logic networks for implementing
the new schemes by means of the primitive operations consisting of single-qubit
gates, two-qubit controlled-not gates, Von Neumann measurement and classically
controlled operations. In these schemes the teleportation are not always
successful but with certain probability.Comment: 9 pages, 5 figure
Generalized Remote Preparation of Arbitrary -qubit Entangled States via Genuine Entanglements
Herein, we present a feasible, general protocol for quantum communication
within a network via generalized remote preparation of an arbitrary -qubit
entangled state designed with genuine tripartite
Greenberger--Horne--Zeilinger-type entangled resources. During the
implementations, we construct novel collective unitary operations; these
operations are tasked with performing the necessary phase transfers during
remote state preparations. We have distilled our implementation methods into a
five-step procedure, which can be used to faithfully recover the desired state
during transfer. Compared to previous existing schemes, our methodology
features a greatly increased success probability. After the consumption of
auxiliary qubits and the performance of collective unitary operations, the
probability of successful state transfer is increased four-fold and eight-fold
for arbitrary two- and three-qubit entanglements when compared to other methods
within the literature, respectively. We conclude this paper with a discussion
of the presented scheme for state preparation, including: success
probabilities, reducibility and generalizability.Comment: 16 pages, 3 figures, 3 tables, Accepted to Entrop