Graduate WKB Approximation: Suggestions for Starting Points

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The discussion focuses on recommendations for books on the WKB approximation, with users seeking alternatives to Griffiths. Liboff is noted for its detailed explanations but is considered not advanced enough for some readers. Shankar is mentioned as being more advanced, suggesting a gap in resources for varying levels of understanding. Participants express a need for books that strike a balance between accessibility and depth. Overall, the thread highlights the challenge of finding suitable literature on the WKB approximation.
Mrinmoy Naskar
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Any good book for starting wkb approximation except Griffth... Please suggest some...
 
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Liboff explained every detail but not very advanced. Shankar was more advanced.
 
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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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