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International Journal of Quantum Information

GENERATION OF GENUINE FIVE-QUBIT ENTANGLED STATES IN ION TRAP AND CAVITY QED

Xiu Ru Lin, Wan-Jun Su

Published Jun 15, 2011• 1 citation
Publisher

Abstract

Recently, a genuine five-qubit entangled state [Formula: see text] has been proposed by Man et al. In this paper, we present a simple scheme for generating such a state in ion trap and cavity QED, respectively. This study offers a new approach to faithful controlled teleportation of an arbitrary two-qubit state in these two systems.
DOI
10.1142/s0219749911007964

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We present an efficient scheme for the controlled generation of pure two-qubit states possessing any desired degree of entanglement and a prescribed symmetry. This is achieved in two-qubit-cavity QED systems (e.g., cold-trapped ions and flying atoms) via on-resonance ion- or atom-cavity couplings, which are time dependent and asymmetric, yielding a trapping vacuum state condition which does not arise for identical couplings. A duality in the role of the coupling ratio yields states with a given concurrence but opposing symmetries. Both the trapping state condition and the resulting entanglement power are robust against decoherence channels.