#HasegawaLoidlEtAl-1 [#ExperimentalPhysics Quantum Mechanics #ViolationOfHeisenberg #WeihsReality] "Physical Review Letters 97, 230401 (2006) Quantum Contextuality in a Single-Neutron Optical Experiment Yuji Hasegawa Rudolf Loidl Gerald Badurek Matthias Baron Helmut Rauch"