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Hu'nan Shifan Daxue xuebao. Ziran kexue ban

Generation of Greenberger-Horne-Zeilinger States in Three Hot Trapped Ions

Mao-Fa Fang

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

A simple scheme to produce the GHZ state of three hot trapped ions is proposed.In this scheme,three two-level ions initially in the same state are confined in linear trap and are simultaneously illuminated by two classical homogeneous lasers.This scheme is insensitive to heating of vibrational motion,which is important in view of decoherence.

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Communications in Theoretical Physics•Feb 1, 2005•1 citation
A simple scheme to produce the GHZ state of three hot trapped ions is proposed.In this scheme,three two-level ions initially in the same state are confined in linear trap and are simultaneously illuminated by two classical homogeneous lasers.This scheme is insensitive to heating of vibrational motion,which is important in view of decoherence.
We propose a simple and fast scheme for producing maximally entangled states for many trapped ions. The scheme only requires a single laser beam tuned to the ionic carrier frequency. Our scheme works in the regime, where the Rabi frequency is of the order of the vibrational frequency. Our scheme operates in a fast way and is insensitive to heating of vibrational motion, which is important in view of decoherence. Thus, our scheme opens promising prospects for entanglement engineering in a scalable way.
A robust scheme is proposed for producing maximally entangled states for many trapped ions in thermal motion. In the scheme the ions are simultaneously illuminated by two standing-wave laser fields. During the operation the phases of the lasers are inverted, which not only cancels the vibration-dependent parts in the evolution operator, but also suppresses direct off-resonant coupling of the internal states. Thus, our scheme allows the production of entanglement for hot trapped ions with laser fields of high intensity, which makes the entanglement speed extremely high.