Question

Is there a Ramond vacuum for real fermions?

Answer 1

When studying the CFT of a complex fermion Ψ we know that if it's periodic, ie if

Ψ(σ1+2π,σ2)=Ψ(σ1,σ2)Ψ(σ1+2π,σ2)=Ψ(σ1,σ2)

then there is a doubly degenerate Ramond vacuum which I denote |±⟩|±⟩.

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Answer 2

Hello mate here is your answer.

When studying the CFT of a complex fermion ΨΨ we know that if it's periodic, ie if

Ψ(σ1+2π,σ2)=Ψ(σ1,σ2)Ψ(σ1+2π,σ2)=Ψ(σ1,σ2)

then there is a doubly degenerate Ramond vacuum which I denote |±⟩|±⟩.

Hope it helps you.