Studying entanglement at low and high energies

Studying entanglement at low and high energies

Seminar author:Beatrix Hiesmayr

Event date and time:10/30/2013 04:00:pm

Event location:IFAE seminar room

Event contact:

In this talk I discuss powerful frameworks to detect entanglement for systems consisting of ordinary matter and light and those consisting of strange quarks. The first framework is based on mutually unbiased bases (“maximum complementarity”) [1]. This criterion was used to reveal experimentally for the first time the bound entanglement of bipartite photons entangled in their orbital angular momentum (“twisted photons”) [2]. Then I present criteria to detect genuine multipartite entanglement applied to the XY model [3] that is a realistic model for condensed matter systems. In particular I will show that the phase transition and scaling properties are fully characterized by our multipartite quantity. This means it provides a useful toolbox for other condensed matter systems, where bipartite entanglement measures are known to fail. Last but not least I focus on a system entangled in the quantum number strangeness. I present the first conclusive test of a Bell inequality in high energy physics [4] and show that it is surprising related to the violation of charge-conjugation—parity symmetry that is in connection to the cosmological question why we live in a matter dominated universe.

[1] C. Spengler, M. Huber, St. Brierley, Th. Adaktylos and B.C. Hiesmayr, Phys. Rev. A 86, 022311 (2012)
[2] B.C. Hiesmayr and W.  Löffler, New J. Phys. 15, 083036 (2013)
[3] S. M. Giampaolo and B.C. Hiesmayr, accepted by Phys. Rev. A (2013); arXiv:1309.0626
[4] B.C. Hiesmayr et al., EPJ C, Vol. 72, 1856 (2012)