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Trade-off between multiple-copy transformation and entanglement catalysis Runyao Duan,1,
 

Summary: Trade-off between multiple-copy transformation and entanglement catalysis
Runyao Duan,1,
* Yuan Feng,1,
Xin Li,1,
and Mingsheng Ying1,
1
State Key Laboratory of Intelligent Technology and Systems, Department of Computer Science and Technology,
Tsinghua University, Beijing, China, 100084
Received 20 November 2003; published 8 June 2005
We demonstrate that multiple copies of a bipartite entangled pure state may serve as a catalyst for certain
entanglement transformations while a single copy cannot. Such a state is termed a "multiple-copy catalyst" for
the transformations. A trade-off between the number of copies of source state and that of the catalyst is also
observed. These results can be generalized to probabilistic entanglement transformations directly.
DOI: 10.1103/PhysRevA.71.062306 PACS number s : 03.67.Mn, 03.65.Ud
I. INTRODUCTION
In recent years, more and more applications of quantum
information processing, such as quantum cryptography 1 ,
quantum superdense coding 2 , and quantum teleportation
3 , have led us to view quantum entanglement as a new kind
of physical resource 4 . One of the central problems about

  

Source: Anderson, Richard - Department of Computer Science and Engineering, University of Washington at Seattle

 

Collections: Computer Technologies and Information Sciences