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Experimental Demonstration of Largeness in Bipartite Entanglement Sudden Death |
| PENG Liang, HUANG Yun-Feng**, LI Li, LIU Bi-Heng, LI Chuan-Feng**, GUO Guang-Can
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Key Lab of Quantum Information, University of Science and Technology of China, Hefei 230026
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| Cite this article: |
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PENG Liang, HUANG Yun-Feng, LI Li et al 2011 Chin. Phys. Lett. 28 070308 |
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Abstract Quantum coherence is the most distinct feature of quantum mechanics. However, inevitable decoherence processes will finally destroy it and make the "Schrödinger's cat" invisible in our classical world. In this "quantum-to-classical transition", the so-called "largeness" plays a critical role. We experimentally study the largeness phenomena in the bipartite entanglement decay process through a depolarizing channel with two-photon entangled states generated from a spontaneous parametric down-conversion source. Our experiment demonstrates how the speed of entanglement decay and the time when "entanglement sudden death" happens depend on the size of the system exposed to the environment noise.
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03.65.Yz
42.50.Dv
42.50.Xa
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Received: 29 March 2011
Published: 29 June 2011
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| PACS: |
03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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42.50.Dv
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(Quantum state engineering and measurements)
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42.50.Xa
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(Optical tests of quantum theory)
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