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How to distill entanglement from a finite amount of qubits?
Author(s) -
ProbstSchendzielorz S.,
Bschorr T.,
Freyberger M.
Publication year - 2006
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.200610317
Subject(s) - entanglement distillation , qubit , quantum entanglement , fidelity , constraint (computer aided design) , process (computing) , scheme (mathematics) , statistical physics , mathematics , physics , quantum mechanics , computer science , w state , quantum , mathematical analysis , telecommunications , geometry , operating system
We discuss a specific entanglement distillation scheme [D. Deutsch et al., Phys. Rev. Lett. 77 , 2818 (1996)] under the constraint of finite samples of entangled qubit pairs. It is shown that an iterative process based on this method can be explicitly formulated. The average fidelity of this process can be strongly enhanced by introducing a conditional storing of entangled qubit pairs in each step of the iteration. We investigate the corresponding limitations on the size and the initial fidelity of the sample.