New possibilities for testing local realism in high energy physics

Abstract

The three photons from the dominant ortho-positronium decay and two vector mesons from the η c exclusive decays are found to be in tripartite and high-dimensional entangled states, respectively. These two classes of entangled states possess the Hardy type nonlocality and allow a priori for quantum mechanics vs local realism test via Bell inequalities. The experimental realizations are shown to be feasible, and a concrete scheme to fulfill the test in experiment via two-vector-meson entangled state is proposed.

Bell’s Universe: A Personal Recollection

“…Last but not least, tests of local realism in the decay of a charmed particle into entangled vector mesons should be mentioned as well [212][213][214].…”

Can strong correlations be experimentally revealed forҠ-mesons?

“…Currently, more and more experiments in the realm of Particle Physics, i.e. for systems at a different energy scales, are exploring these fundamental issues [2][3][4][5][6][7][8][9][10]. These experiments presently enter precision levels where, for various reasons, new physics is expected.…”

“…This is possible because there exists two different measurement procedures, an active one, exerting the free will of the experimenter, and a passive one, with no control over the measurement basis nor on the time point. [2][3][4][5][6][7][8][9]), but they lack a direct experimental verification since both the observable as well as state space are limited. The first Bell test overcoming this insufficiency was found in Ref.…”

A quantum information view on observables in the neutral kaon system

“…the neutral K-meson or B-meson system, have turned out to be very suitable to discuss various quantum foundation issues as e.g. quantum erasing and marking procedures [2,3,4,5] or Bell inequalities [6,7,8,9,10,11,12] or for testing decoherence or entanglement in the system [13,14,15,16,17,18,19] or Bohr's complementary relation [20] or possible C PT violation effects [21,22,23].…”