Publication Date:
2009-05-09
Description:
Access to genuine multipartite entanglement of quantum states enables advances in quantum information science and also contributes to the understanding of strongly correlated quantum systems. We report the detection and characterization of heralded entanglement in a multipartite quantum state composed of four spatially distinct optical modes that share one photon, a so-called W state. By randomizing the relative phase between bipartite components of the W state, we observed the transitions from four- to three- to two-mode entanglement with increasing phase noise. These observations are possible for our system because our entanglement verification protocol makes use of quantum uncertainty relations to detect the entangled states that span the Hilbert space of interest.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Papp, Scott B -- Choi, Kyung Soo -- Deng, Hui -- Lougovski, Pavel -- van Enk, S J -- Kimble, H J -- New York, N.Y. -- Science. 2009 May 8;324(5928):764-8. doi: 10.1126/science.1172260.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19423821" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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