We realize scattering states in a lossy and chaotic two-dimensional microwave
cavity which follow bundles of classical particle trajectories. To generate
such particlelike scattering states we measure the system's transmission matrix
and apply an adapted Wigner-Smith time-delay formalism to it. The necessary
shaping of the incident wave is achieved in situ using phase and amplitude
regulated microwave antennas. Our experimental findings pave the way for
establishing spatially confined communication channels that avoid possible
intruders or obstacles in wave-based communication systems.Comment: 6 pages, 4 figure
