摘要
We propose a scheme for controlled entanglement swapping of continuous variable, where an EPR pair shared by two parties （Alice and Debbie） and a GHZ entangled state shared by three parties （Alice, Bob and Claire） are required. One optical beams of the EPR state will be entangled with the output mode displaced by Bob with the help of Claire. It is shown that the entanglement swapping can occur controlled by the third party （Claire）
基金
The project supported by National Natural Science Foundation of China(NSFC)under Grant Nos.60678022 and 10704001
the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20060357008
Natural Science Foundation of Anhui Province under Grant No.070412060
the Key Program of the Education Department of Anhui Province under Grant No.2006KJ070A
the Talent Foundation of Anhui University,and Anhui Key Laboratory of Information Materials and Devices(Anhui University)
