GENERATION OF THE N-QUBIT CLUSTER STATE IN THE ION TRAP SYSTEM VIA ADIABATIC EVOLUTION OF THE DARK STATE

2010 ◽  
Vol 08 (08) ◽  
pp. 1315-1321
Author(s):  
GUANG-LING CHENG ◽  
WEN-XUE ZHONG ◽  
AI-XI CHEN
Keyword(s):  
Information Transfer ◽  
Ion Trap ◽  
Vibrational Mode ◽  
Cluster State ◽  
Vacuum State ◽  
Adiabatic Passage ◽  
Adiabatic Evolution ◽  
Alternative Scheme ◽  
System Parameters ◽  
Trap System

We present an alternative scheme for generating the N-qubit cluster state in the ion trap system. This scheme is based on adiabatic passage and thus is insensitive to the small fluctuations of the system parameters. During the process of evolution, quantum information transfer occurs only between the ions, and the collective vibrational mode remains in the vacuum state without excitation. Thus, the scheme is robust against phonon decoherence.

Implementation of a multiqubit phase gate with one qubit simultaneously controlling n qubits in the ion-trap system

2014 ◽  
Vol 14 (7&8) ◽  
pp. 625-632
Author(s):  
Xiu Lin
Keyword(s):  
Degrees Of Freedom ◽  
Energy Exchange ◽  
Ion Trap ◽  
Vibrational Mode ◽  
Vibrational Motion ◽  
Trap System ◽  
Control Qubit ◽  
Phase Gate ◽  
External Degrees

In this paper, we present a scheme for implementing a multiqubit phase gate with one control qubit simultaneously controlling n target qubits in the ion-trap system. In our scheme, there is no energy exchange between the internal and external degrees of freedom in the course of operation, and the vibrational mode is only virtually excited. The system is insensitive to changes in the vibrational motion. The proposed scheme is experimentally feasible based on the present ion-trap techniques.

ENTANGLEMENT GENERATION AND CONCENTRATION VIA ADIABATIC EVOLUTION WITH TRAPPED IONS

2008 ◽  
Vol 22 (01) ◽  
pp. 1-7 ◽  
Author(s):  
PING DONG ◽  
GANG ZHANG ◽  
MING YANG ◽  
ZHUO-LIANG CAO
Keyword(s):  
Ion Trap ◽  
Entanglement Swapping ◽  
Trapped Ions ◽  
The Other ◽  
Current Idea ◽  
Adiabatic Passage ◽  
Adiabatic Evolution ◽  
Cluster States ◽  
Entanglement Generation ◽  
Experimental Parameters

We propose two schemes via adiabatic evolution of dark eigenstates in an ion trap system. One is an entanglement generation of multi-ion cluster states, the other is entanglement concentration via entanglement swapping. Our schemes are robust against moderate fluctuations of experimental parameters since we utilize the adiabatic passage in the main procedure. The current idea can be generalized to other systems.

Implementing a Universal Quantum Cloning Machine via Adiabatic Evolution in Ion-Trap System

2008 ◽  
Vol 49 (1) ◽  
pp. 80-82
Author(s):  
Yang Rong-Can ◽  
Li Hong-Cai ◽  
Lin Xiu ◽  
Huang Zhi-Ping ◽  
Xie Hong
Keyword(s):  
Ion Trap ◽  
Quantum Cloning ◽  
Adiabatic Evolution ◽  
Trap System ◽  
Universal Quantum

A fast scheme for one-step preparation of a highly entangled cluster state in the ion-trap system

2008 ◽  
Vol 78 (6) ◽  
pp. 065401 ◽  
Author(s):  
Ying-Qiao Zhang ◽  
Shou Zhang ◽  
Xing-Ri Jin
Keyword(s):  
Ion Trap ◽  
Cluster State ◽  
Trap System ◽  
One Step

Creation of cluster state of four ions in ion-trap system by individual addressing

Optik ◽  
2014 ◽  
Vol 125 (21) ◽  
pp. 6395-6403
Author(s):  
Shirin Enferad ◽  
Mahdi Amniat-Talab ◽  
Maghsud Saadati-Niari
Keyword(s):  
Ion Trap ◽  
Cluster State ◽  
Trap System

REALIZATION OF THE GREENBERG–HORNE–ZEILINGER (GHZ) STATE AND SWAP GATE WITH SUPERCONDUCTING QUANTUM-INTERFERENCE DEVICES IN A CAVITY VIA ADIABATIC PASSAGE

2008 ◽  
Vol 22 (15) ◽  
pp. 1507-1513 ◽  
Author(s):  
AN-SHOU ZHENG ◽  
YONG-JIN CHENG ◽  
JI-BING LIU ◽  
TIE-PING LI
Keyword(s):  
Quantum Interference ◽  
Ghz State ◽  
Adiabatic Passage ◽  
Adiabatic Evolution ◽  
Alternative Scheme ◽  
Present Scheme ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference ◽  
Swap Gate ◽  
Cavity Damping

We propose an alternative scheme to prepare the Greenberg–Horne–Zeilinger (GHZ) state and realize a SWAP gate by using Superconducting Quantum-interference devices (SQUIDs) coupled to a cavity. The present scheme, based on the adiabatic evolution of dark state, constitutes a decoherence-free method in the sense that spontaneous emission and cavity damping are avoided. Besides, the standard GHZ state can be directly obtained without measurement or any auxiliary SQUIDs and the construction of the SWAP gate does not require a composition of elementary gates from a universal set. Thus the procedure is simplified and decoherence is greatly suppressed.

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