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Openai/6905caf3-8140-8008-9ff1-39937c7b92b1
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==== Ⅰ-2. 1RSB 鞍点方程式と複雑度 ==== たとえば球面 ppp-spin で順序パラメータ (q1,q0,m)(q_1,q_0,m)(q1,q0,m) をとる 1RSB の ϕ(m)\phi(m)ϕ(m) を極値化し、 ∂ϕ∂q1=0,∂ϕ∂q0=0,∂ϕ∂m=0(5)\frac{\partial \phi}{\partial q_1}=0,\quad \frac{\partial \phi}{\partial q_0}=0,\quad \frac{\partial \phi}{\partial m}=0 \tag{5}∂q1∂ϕ=0,∂q0∂ϕ=0,∂m∂ϕ=0(5) を解くと(詳細な係数はモデル固有)、(4) から Σ(f) = βm2∂ϕ∂m∣1RSB > 0(6)\boxed{ \Sigma(f)\;=\;\beta m^2 \frac{\partial \phi}{\partial m}\Big|_{\rm 1RSB}\;>\;0 } \tag{6}Σ(f)=βm2∂m∂ϕ1RSB>0(6) が得られる領域(閾値自由エネルギー fthf_{\rm th}fth まで)が現れる。ここで レプリコン固有値 λR\lambda_{\rm R}λR が λR=0(7)\lambda_{\rm R}=0 \tag{7}λR=0(7) (marginal 条件)を満たすラインが「SUSY 破れ境界」と一致し、そこから上(より高い fff)で Σ>0\Sigma>0Σ>0(指数的多数の準安定谷)が現れるのが典型です。 : 直観:SUSY が保たれるとボソン・フェルミオン線の Ward による厳密相殺で「状態の指数増殖」が抑えられ、SUSY が破れると相殺が崩れ、 : ∂ : 𝑚 : 𝜙 : ≠ : 0 : ⇒ : Σ : > : 0 : ∂ : m : : : ϕ : : =0⇒Σ>0 が生じます。
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