I Understanding Ground State Degeneracy in the Transverse Ising Model

I
Thread starter thatboi
Start date Dec 19, 2023
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Physics Quantum Transverse

Dec 19, 2023

thatboi

Hi all,
I was wondering if there was a reference/textbook where the degenerate perturbation calculation for the Transverse Ising model was treated fully. I want to better understand how in the weak magnetic field limit, the ground state degeneracy only lifts at N'th order in perturbation theory (for a lattice of N spins).

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