Quantum Magnetism and Quantum Entanglement
Note - IPM
Note - IPM
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Jahanfar Abouie<br />
Adv Cond Mat<br />
Smr School<br />
2012-IPM<br />
51/<br />
Factorizing point – Homogenous spin-1/2 model<br />
H = ∑ H<br />
l,<br />
l ′<br />
l,<br />
l′<br />
Bloch sphere<br />
H ψ ψ = ε ψ ψ<br />
l,<br />
l′ l l′ l l′<br />
ϕ<br />
ϕ<br />
θ −i<br />
θ i<br />
2 2<br />
ψ<br />
l<br />
= cos e ↑ + sin e ↓<br />
2 2<br />
ϕ<br />
Conditions for factorization
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