Papp, Scott B. and Choi, Kyung Soo and Deng, Hui and Lougovski, Pavel and van Enk, S. J. and Kimble, H. J. (2009) Characterization of multipartite entanglement for one photon shared among four optical modes. Science, 324 (5928). pp. 764-768. ISSN 0036-8075 http://resolver.caltech.edu/CaltechAUTHORS:20090610-100904573
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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.
|Additional Information:||© 2009 American Association for the Advancement of Science. We gratefully acknowledge critical discussions with J. Laurat, P. Zoller, and J. Ye. This research is supported by IARPA, by NSF, and by NGST. S.P. and H.D. acknowledge support as Fellows of the Center for the Physics of Information at Caltech.|
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|Deposited By:||Tony Diaz|
|Deposited On:||18 Aug 2009 23:27|
|Last Modified:||26 Dec 2012 11:02|
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