21: Using the commutators [H, a]=-hwa & [H,at] = ha at show that alu) is an eigenvector of H with eigenvalue En- tie and that a tfu) is an eigenvector of H with eigenval A En + hw . Discuss the meaning of your results.
21: Using the commutators [H, a]=-hwa & [H,at] = ha at show that alu) is an eigenvector of H with eigenvalue En- tie and that a tfu) is an eigenvector of H with eigenval A En + hw . Discuss the meaning of your results.
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