Физтех в лицах  
 Sergey Filippov
Sergey FilippovLatest newsLocal two-qubit entanglement-annihilating channels

  Фото  
 
 
   
 
   
   
   
   
   
   
Local two-qubit entanglement-annihilating channels

Article is written in collaboration with Tomas Rybara and Mario Zimana,b, deals with rather interesting properties of two-qubit channels and is now available at arXiv:1110.3757v1 [quant-ph]

Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia (RCQI)

b Institute for Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland

 

Abstract

We address the problem of the robustness of entanglement of bipartite systems (qubits) interacting with dynamically independent environments. In particular, we focus on characterization of so-called local entanglement-annihilating two-qubit channels, which set the maximum permissible noise level allowing to perform entanglement-enabled experiments. The differences, but also subtle relations between entanglement-breaking and local entanglement-annihilating channels are emphasized. A detailed characterization of latter ones is provided for a variety of channels including depolarizing, unital, (generalized) amplitude-damping, and extremal channels. We consider also the convexity structure of local entanglement-annihilating qubit channels and introduce a concept of entanglement-annihilation duality.


 
© 2001-2006 Moscow Institute of Physics and Technology (State University)
Developing: Center of Pre-University Education «Phystech-Center».
Site created with ARP-technology
Рейтинг сайтов  Arp.site