Show that a variational calculation with a BCS wavefunction as the variational state, where (hat{H}) is the
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Show that a variational calculation with a BCS wavefunction as the variational state,
where \(\hat{H}\) is the Hamiltonian and \(\lambda\) is the variational parameter, leads to \(\lambda=d E / d N\), where \(E\) is the energy and \(N\) is the average particle number.
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Solving deltaleftlanglePsimathrmBCSlefthatHprime ...View the full answer
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Related Book For 
Symmetry Broken Symmetry And Topology In Modern Physics A First Course
ISBN: 9781316518618
1st Edition
Authors: Mike Guidry, Yang Sun
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