I Vacuum energy and Energy conservation

Ebi Rogha
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I understand from Noether's theorem, energy is not conserved in big scale space-time (because space-time is not static in big scales).
Also, I have heard from physicists that vacuum energy fluctuation (creation and destruction of virtual particles) violates energy conservation. The reason, they justify, is based on uncertainty principle (energy-time form of uncertainty principle), energy can exist and disappear for a very short period of time.
Could somebody explain this in simple words please?
 
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Ebi Rogha said:
I have heard from physicists

This is not an acceptable referende. How are we to track that down and figure out where the misunderstanding is.

Ebi Rogha said:
Casimir experiment energy conservation violate energy conservation
They do not.
 
Vanadium 50 said:
They do not.
Thanks Vanadium 50
How about vacuum fluctuation, does it violate energy conservation?
 
Ebi Rogha said:
I have heard from physicists
As has already been pointed out, this is not a valid reference. Without a valid reference we have no basis for a discussion.

For that reason, I am closing this thread. @Ebi Rogha, if you have a reference, please PM me and I will look at it, and if it looks OK, I will reopen the thread so you can post it.
 
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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