Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Quanteninformation: Konzepte und Methoden 4

Q 31.5: Vortrag

Dienstag, 13. März 2012, 15:00–15:15, V7.01

Spin squeezing and entanglement in systems of spin-j particles — •Giuseppe Vitagliano1, Philipp Hyllus1, Iñigo Egusquiza1, and Géza Tóth1,2,31Theoretical Physics, The University of the Basque Country, E-48080 Bilbao, Spain — 2IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain — 3Research Institute for Solid State Physics and Optics, H-1525 Budapest, Hungary

We discuss the problem of finding inequalities useful to detect entanglement in systems of particles with a spin higher than 1/2 [1]. We focus on uncertainty relations based on the knowledge of the first two moments of the total spin components Ji. We compare the various inequalities obtained from the point of view of their usefulness to detect entanglement by characterizing the experimental effort needed and by studying the states that violate them.

[1] G. Vitagliano, P. Hyllus, I.L. Egusquiza, and G. Tóth, Phys. Rev. Lett. 107, 240502 (2011).

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