# Stuttgart 2012 – wissenschaftliches Programm

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# Q: Fachverband Quantenoptik und Photonik

## Q 12: Quanteninformation: Photonen und nichtklass. Licht

### Q 12.6: Vortrag

### Montag, 12. März 2012, 15:15–15:30, V7.02

**Regularised tripartite continuous variable EPR states with CHSH violation** — •Sol Jacobsen^{1} and Peter Jarvis^{2} — ^{1}Freiburg Institute for Advanced Studies, Freiburg Im Breisgau, Germany — ^{2}University of Tasmania, Hobart, Australia

Experiments making use of EPR correlations with continuous variables typically require infinite squeezing to maximize violation of the CHSH inequalities. The mathematical construction of such states is designed to have particular Wigner function behaviour, and to reach the appropriate EPR limit as the tunable squeezing parameter approaches infinity. In this talk we use a direct transcription of bipartite continuous variable EPR states with maximal violation for a finite value of a tunable parameter, and we provide a generalization to tripartite states. The results are compared with existing implementations from quantum optics, showing direct correspondence in the bipartite case, but with two regions of violation in the tripartite instance. The result is thus a rigorous and direct generalization of the EPR states, with a new structure suggesting alternative approaches to the experimental manipulation of such states are possible.