Understanding Spin Matrix: Pauli Matrices and 6x6 Matrices

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SUMMARY

This discussion focuses on the derivation and understanding of the spin matrix for a system with spin quantum number S=5/2, specifically the 6x6 matrix representations for the operators S_x, S_y, and S_z. Key techniques discussed include the use of ladder operators and the matrix element notation . Participants emphasize the importance of understanding the matrix representation of operators and provide references to Sakurai's "Modern Quantum Mechanics" for further reading. The conversation highlights the complexity of calculating matrix elements and the significance of bra-ket notation in quantum mechanics.

PREREQUISITES
  • Understanding of quantum mechanics, specifically angular momentum theory.
  • Familiarity with Pauli matrices and their applications in quantum systems.
  • Knowledge of ladder operators and their role in quantum state transitions.
  • Proficiency in bra-ket notation and matrix representation of operators.
NEXT STEPS
  • Study the derivation of the matrix representation for S=1/2 systems to build foundational knowledge.
  • Learn about the application of ladder operators in quantum mechanics, particularly for higher spin systems.
  • Explore the concept of matrix elements in quantum mechanics, focusing on notation.
  • Investigate the implications of using different units (e.g., h-bar) in quantum Hamiltonians and their matrix representations.
USEFUL FOR

Quantum mechanics students, researchers in theoretical physics, and anyone interested in the mathematical representation of spin systems and angular momentum operators.

  • #31
what is unit of your H? Sorry but there are so many different conventions and also what kind of system does this apply to?

I usually call the magnetic field B, and B*S then is not equal energy..

Just go back to the place where you got the hamiltonian, if you can't solve it - start a new thread.
 

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