The Special Features of Superluminal Evanescent Mode Propagation

The formal analogy between classical evanescentmodes and particle tunneling in wave mechanics hasrecently initiated microwave experiments. Studies withmicrowaves and later with single photons have revealed superluminal group and energy velocities ofevanescent modes (the classical analogy to tunnelingsolutions). Microwave experiments have even demonstratedsuperluminal propagation of frequency bandwidth limited signals. This result does allow achange of chronological order of events in an inertialsystem or between different inertial systems. Evanescentmodes do exist in a space free of time. The measured and the calculated dwell time of evanescentmodes are zero inside a barrier.