Multiphoton entanglement engineering via projective measurements

Christian Schmid; Nikolai Kiesel; Witlef Wieczorek; Reinhold Pohlner; Harald Weinfurter

doi:10.1117/12.734697

10 September 2007 Multiphoton entanglement engineering via projective measurements

Christian Schmid, Nikolai Kiesel, Witlef Wieczorek, Reinhold Pohlner, Harald Weinfurter

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Proceedings Volume 6780, Quantum Communications Realized; 67800E (2007) https://doi.org/10.1117/12.734697
Event: Optics East, 2007, Boston, MA, United States

Abstract

We present strategies to obtain different classes of three and four photon entangled symmetric states from a single experimental setup. The basic idea originates from the property of the symmetric Dicke state with two excitations to connect the two inequivalent types of genuine tripartite entanglement. We experimentally confirm the distinct types of entanglement of the observed states. We further propose an extension of the applied scheme that allows one to obtain different classes of four-photon entanglement by adding a fifth photon. The requirement of a single fifth photon is currently a technical challenge, and thus we consider the approach of using a strongly attenuated weak coherent beam instead.

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Christian Schmid, Christian Schmid, Nikolai Kiesel, Nikolai Kiesel, Witlef Wieczorek, Witlef Wieczorek, Reinhold Pohlner, Reinhold Pohlner, Harald Weinfurter, Harald Weinfurter, } "Multiphoton entanglement engineering via projective measurements", Proc. SPIE 6780, Quantum Communications Realized, 67800E (10 September 2007); doi: 10.1117/12.734697; https://doi.org/10.1117/12.734697

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