Communications in Theoretical Physics

Fast Preparation of W States for Hot Trapped Ions

Shi-Biao Zheng

Published Jul 1, 2005• 3 citations

Abstract

A scheme is presented for generating W states for three or four trapped ions in thermal motion. The scheme works in the regime, where the Rabi frequency of the laser field is on the order of the trap frequency, resulting a fast entanglement speed, which is of importance in view of decoherence.

DOI: 10.1088/6102/44/1/143

Related papers

Fast Preparation of W States for Hot Trapped Ions

ZHENGShi-Biao

A scheme is presented for generating W states for three o()four trapped ions in thermal motion. The scheme works in the regime, where the Rabi frequency of the laser field is on the order of the trap frequency, resulting a fast entanglement speed, which is of importance in view of decoherence.

理论物理通讯：英文版Jan 1, 20050 citations

Fast Preparation of W States for Hot Trapped Ions

Zheng Zheng, Shi-Biao

理论物理通讯：英文版Jan 1, 20050 citations

Fast scheme for the generation of entangled states of multiple hot trapped ions

Shi‐Biao Zheng

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.

Physical Review AMay 8, 200221 citations

Fast scheme for generating quantum-interference states and GHZ state of N trapped ions

Zheng Xiao-Juan, Mao-Fa Fang, Xiang-Ping Liao +2 more

We propose a fast scheme to generate the quantum-interference states of N trapped ions. In the scheme the ions are driven by a standing-wave laser beam whose carrier frequency is tuned such that the ion transition can take place. We also propose a simple and fast scheme to produce the GHZ state of N hot trapped ions and this scheme is insensitive to the heating of vibrational motion, which is important from the viewpoint of decoherence.

Chinese PhysicsMar 20, 20076 citations

Scheme for teleportation of unknown states of trapped ion

Chen Mei-Feng, Ma Song-She

A scheme is presented for teleporting an unknown state in a trapped ion system. The scheme only requires a single laser beam. It allows the trap to be in any state with a few phonons, e.g. a thermal motion. Furthermore, it works in the regime, where the Rabi frequency of the laser is on the order of the trap frequency. Thus, the teleportation speed is greatly increased, which is important for decreasing the decoherence effect. This idea can also be used to teleport an unknown ionic entangled state.

Chinese Physics BFeb 1, 20084 citations

Two Schemes for Generation of Entanglement for Vibronic Collective States of Multiple Trapped Ions

Wen‐Xing Yang, Jiahua Li, Anshou Zheng

We propose two schemes to prepare entanglement for the vibronic collective states of multiple trapped ions. The first scheme aims to generating multipartite entanglement for vibrational modes of trapped ions, which only requires a single laser beam tuned to the ionic carrier frequency. Our scheme works in the mediated excitation regime, in which the corresponding Rabi frequency is equal to the trap frequency. Beyond their fundamental importance, these states may be of interest for experimental studies on decoherence since the present scheme operates in a fast way. The second scheme aims to preparing the continuous variable multimode maximally Greenberger–Horne–Zeilinger state. The distinct advantage is that the operation time is only limited by the available laser intensity, not by the inherent mechanisms such as off-resonant excitations. This makes it promising to obtain entanglement of multiple coherent and squeezing states with desired amplitudes in a reasonable time.

Communications in Theoretical PhysicsMar 1, 20073 citations