**1.3 Modern experiments**

Mach-Zehnder interferometers and Stern-Gerlach spin-devices play a key role in Quantum measurement development [Barnett (2009); Barrow et al. (2004); Hawking & Mlodinow (2010); Jammer (1974)]. Wave particle-duality has been demonstrated in larger particles [Arndt et al. (1999)] and advanced optical fibers, communication, computer software, photonics, and integrated technologies have been applied to different quantum media [Barrow et al. (2004); Grangier et al. (1986)].
