I Partially entangled(W), Maximally and disentangled states

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Noora Alameri
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Hi,

How can I give a good summary about the main and real difference between these three states? physically and mathematically.

Thanks
 
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Physically, the three states of matter (solid, liquid, and gas) can be distinguished by their different behavior in response to changes in temperature and pressure. Solid materials tend to remain rigid and their shape is fixed, while liquids flow and conform to the shape of their containers, and gases expand freely to fill any container. Mathematically, the three states of matter can be distinguished by their different characteristic equations of state. The equation of state for a solid relates the pressure, volume, and temperature of the material, while the equation of state for a liquid relates the pressure, temperature, and surface tension of the material. The equation of state for a gas relates the pressure, temperature, and volume of the material.
 
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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