Simplifying Quantum Mechanics with Dirac Notation

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SUMMARY

The discussion focuses on simplifying quantum mechanics expressions using Dirac notation, specifically the expression . The participants clarify that applying the operator H to the state |E> results in E|E>, which leads to the simplification of the expression to (E-E) = 0. The key takeaway is that separating the operators QH and HQ allows for straightforward simplification of the expression.

PREREQUISITES
  • Understanding of Dirac notation in quantum mechanics
  • Familiarity with quantum operators and their properties
  • Knowledge of eigenstates and eigenvalues in quantum systems
  • Basic principles of quantum mechanics
NEXT STEPS
  • Study the properties of quantum operators in Dirac notation
  • Learn about eigenvalue equations in quantum mechanics
  • Explore the implications of commutation relations in quantum systems
  • Investigate advanced topics in quantum mechanics, such as perturbation theory
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Students and educators in physics, particularly those focusing on quantum mechanics, as well as researchers looking to deepen their understanding of Dirac notation and operator algebra.

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Homework Statement



trying to simplify (using dirac notation) QM:

<E| (QH - HQ) |E>

using H|E> = E|E>



Homework Equations





The Attempt at a Solution



the textbook says that it simplifies to (E-E) <E|Q|E> = 0 but i can't see how :S
 
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hi bon! :smile:
bon said:
<E| (QH - HQ) |E>

do the QH and the HQ separately …

the QH simplifies to the right, and the HQ simplifies to the left :wink:
 
sorry got it now thanks
 

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