Classical Physics compared to Quantum Physics?

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SUMMARY

This discussion concludes that classical physics is more elegant and ingenious than quantum physics, emphasizing the simplicity of Newton's law of gravitation in mapping satellite trajectories. Classical physics serves as a refinement of everyday life, while quantum physics builds upon its foundations. The conversation highlights the significant intellectual achievements of figures like Newton and Copernicus in developing these theories, suggesting that the mental leaps required for concepts like General Relativity and Quantum Physics are substantial.

PREREQUISITES
  • Understanding of Newton's law of gravitation
  • Familiarity with the principles of classical physics
  • Basic knowledge of quantum physics concepts
  • Awareness of General Relativity
NEXT STEPS
  • Research the implications of Newton's law of gravitation in modern satellite technology
  • Explore the differences between classical and quantum physics in practical applications
  • Study the contributions of Copernicus and Einstein to the evolution of physics
  • Investigate the philosophical implications of the transition from classical to quantum physics
USEFUL FOR

Students of physics, educators, and anyone interested in the foundational concepts and historical development of classical and quantum physics.

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After studying both areas of classical and quantum physics in some depth, I've reached the conclusion classical physics is more elegant and ingenious than quantum physics.

Newton's law of gravitation is elegant because its sheer simplicity allows us to map the trajectory of satellites.

Classical physics is a refinement of everday life. Quantum physics is a refinement of classical physics.

Therefore the notions of classical physics must have required an absolute genius to refine from everyday life - such as Newton. With quantum physics however, the foundations are already in place.
 
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classical physics is interesting to me too, but I wonder that if it can fully be used in real life applications, there is more that is happening then just classical physics.
 
Well it's definitely true that classic physics is simple and elegant, I would say it took a greater mental leap to establish something like General Relativity or Quantum Physics, than it did for Newton. Though I think it's arguable that Copernicus made a mental leap just as big as Einstein did.
 
Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?

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