Is a wave function as complete as can be

Roodles01
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For a wave function describing the state of an isolated system in 1D, does a wave function describe a system completely?
 
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According to standard quantum mechanics the quantum state represented by a wave function is complete. The are no further hidden variables or hidden information.

Of course one has to take into account relevant information like spin etc.
 
Ooh! Not got up to spin, yet.
Thank you.
 
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
If we release an electron around a positively charged sphere, the initial state of electron is a linear combination of Hydrogen-like states. According to quantum mechanics, evolution of time would not change this initial state because the potential is time independent. However, classically we expect the electron to collide with the sphere. So, it seems that the quantum and classics predict different behaviours!

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