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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2012, Volume 96, Issue 7, Pages 534–538 (Mi jetpl3253)  

QUANTUM INFORMATION SCIENCE

Scheme for realizing entanglement concentration via generalized measurements

Ch. Q. Dua, M. Yanga, Y. Lua, Zh.-L. Caob

a Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, School of Physics {\&} Material Science, Anhui University
b School of Electronic Information Engineering, Hefei Normal University,
References:
Abstract: How to concentrate non-maximally entangled states for quantum communication is a fundamental problem in quantum information. In this paper, we will apply generalized measurements to entanglement concentration of known non-maximally entangled pure states in arbitrary dimensional system. How to design the generalized measurements for the unambiguous discrimination of linearly independent non-orthogonal states is crucial for the concentration of the known non-maximally entangled states. The result shows that, any known non-maximally entangled pure state (for arbitrary dimensional system) can be transformed to the maximally entangled state only by introducing a qubit as ancilla and a joint unitary transformation operation on one of the entangled particles and the ancilla. In addition, because the less entangled state of each fail round will be re-concentrated too, the entanglement waste during the concentration process will be greatly reduced.
Received: 14.02.2012
Revised: 07.08.2012
English version:
Journal of Experimental and Theoretical Physics Letters, 2012, Volume 96, Issue 7, Pages 486–490
DOI: https://doi.org/10.1134/S0021364012190058
Bibliographic databases:
Document Type: Article
Language: English
Citation: Ch. Q. Du, M. Yang, Y. Lu, Zh.-L. Cao, “Scheme for realizing entanglement concentration via generalized measurements”, Pis'ma v Zh. Èksper. Teoret. Fiz., 96:7 (2012), 534–538; JETP Letters, 96:7 (2012), 486–490
Citation in format AMSBIB
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\paper Scheme for realizing entanglement concentration via
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\vol 96
\issue 7
\pages 534--538
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\transl
\jour JETP Letters
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\pages 486--490
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