Quantum Measurement Problem
At the heart of quantum theory, which is the foundation of our present understanding of all matter and energy, there is a paradox: the theory is able to describe everything, except the experiments that provide the data upon which the theory itself is built! This dilemma has been discussed by many great physicists of the 20th century, including Niels Bohr and Albert Einstein, two of the ‘founding fathers’ of quantum physics, who passionately debated it for eight years. Tracking the fascinating history of this subject and enquiring into our still problematic present understanding of it takes us straight to the deepest philosophical questions of contemporary physics (and beyond!).
For a non-technical presentation of the problem and of my thoughts about it, see The quantum measurement problem (pdf, 123 KB)
For a more technical presentation of the problem and of my thoughts about it, see Persistence of information in the quantum measurement problem (pdf, 272 KB)