The before-before experiment shows that correlated events caused by quantum entanglement cannot be described in terms of "before" and "after": None of the two correlated events can be considered the cause of the other. The time-notion makes sense only in the domain of the relativistic local phenomena. Quantum entanglement has its roots outside of space-time.

The joint outcomes in Bell experiments cannot be described as being determined by pre-existing properties of particles independent of the measurement (realism). But giving up the concepts of locality and realism is not sufficient to be consistent with quantum experiments: One has to abandon time-ordered causality too, as the before-before experiment demonstrates.

A quantum correlation is a single event in which local randomness and non-local order (correlations) appear inseparably united. Nature establishes order without time: this is likely the most counterintuitive feature of quantum physics.

The Center for Quantum Philosophy, based in Zurich and Geneva, aims at wide spreading this discovery, and to stimulate the discussion about its cultural and philosophical implications.

A talk by John Bell explaining his theorem at the CERN (Geneva), followed by an exciting discussion on scientific and philosophical issues.

Tutorial-presentations explaining the basic principles of the quantum world, and the relevance of the before-before experiment.

A list of publications presenting the experiment and discussing his scientific, metaphysical and cultural implications.

An biographical note telling the story behind the mentioned experiment.

Correspondence with interested readers.

Top of page