Undergrad Newtonian Gravity Vs. Quantum Gravity

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SUMMARY

The discussion highlights the fundamental differences between Newtonian Gravity and Quantum Gravity. Newtonian Gravity, based on classical mechanics, describes gravitational forces in a straightforward manner, while Quantum Gravity seeks to reconcile general relativity with quantum mechanics. The conversation emphasizes the necessity for individuals to grasp the foundational concepts of both theories before delving into their distinctions.

PREREQUISITES
  • Understanding of classical mechanics and Newton's laws of motion
  • Basic knowledge of general relativity and its principles
  • Familiarity with quantum mechanics and its fundamental concepts
  • Ability to differentiate between classical and quantum theories of physics
NEXT STEPS
  • Study the principles of Newtonian Gravity and its mathematical formulations
  • Explore the fundamentals of Quantum Gravity and its current theories
  • Research the implications of general relativity on gravitational phenomena
  • Investigate the ongoing debates and experiments in quantum mechanics related to gravity
USEFUL FOR

Physics students, researchers in theoretical physics, and anyone interested in the foundational concepts of gravity and its implications in both classical and quantum realms.

Quantum Physics
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I want to know the differences between Newtonian Gravity and Quantum Gravity
 
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This is much too broad for a PF discussion. You will need to take the time to learn the basics of each of these for yourself, and then come back with a more specific question about the differences between them when you find something you don't understand.

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Thread 'Two equivalent statements of time reversal symmetric Hamiltonian'

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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