Dual nature of atom is the base of Quantum theory which states that small bits of matter seems to act like particles and sometime as waves. Copenhagen interpretation states that a particle is a wave smeared across the universe and collapses into a defined location only when it is observed.
However there is another school of thought led by Louis de Broglie who propagated an alternative to the quantum theory, the Pilot Wave Theory. The theory postulates that quantum particles are borne along on some type of wave. The particles have definite trajectories but due to the pilot wave’s effect, they still exhibit wavelike statistics.
The pilot wave theory deserves a second look and there are many who also adhere to this belief. Yves Couder, Emmanuel Fort, and colleagues at the University of Paris Diderot have recently discovered a macroscopic pilot-wave system whose statistical behavior, in certain situation, behaves according to quantum systems.
The system propounded by Couder and Fort consists of a bath of fluid vibrating at a rate which is just below the threshold at which waves will form on its surface. When a drop of the same liquid is released above the bath and when it strikes the surface it will create waves which will radiate outwards. The droplet will then move forward by the waves it has created.
John Bush, a professor of applied mathematics at MIT, believes that pilot-wave theory deserves a second look.
Bush says “This system is undoubtedly quantitatively different from quantum mechanics. It’s also qualitatively different: There are some features of quantum mechanics that we can’t capture, some features of this system that we know aren’t present in quantum mechanics. But are they philosophically distinct?”
The Copenhagen interpretation side steps the challenge of calculating particle trajectories by denying its existence. The pilot wave theory is undoubtedly complex; it could replace the philosophical vagaries of quantum mechanics with a concrete dynamical theory.