Quantum Interference in Time PhysicsWeb, Slashdot Paulus and colleagues have conducted a novel version of the double slit experiment, observing interference fringes with electrons passing through a double slit in time. Separated by femtosecond laser pulses, the 'slit' is composed of two maxima and one minima of the electric field. Slashdot notes several related articles on Zeilinger's interference experiments with fullerenes and biomolecules; see also the "delayed-choice quantum eraser" experiment by Shih and Kim.
Schwab comments on Phys. Rev. Lett. 94, 030402 (2005) arXiv In reply to the recent Gaidarzhy et al. report on "Evidence for Quantized Displacement in Macroscopic Nanomechanical Oscillators," Schwab et al. contend that the Letter contains order-of-magnitude omissions and inaccuracies counter to any interpretation of quantized macroscopic displacement: " ... the evidence, analysis, claims, and conclusions presented are contrary to expectations from fundamentals of quantum mechanics and elasticity theory, and [...] the method used by the authors is unsuitable in principle to observe the quantized energy states of a nanomechanical structure."