How to plot this equation

2024 1 11
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更新时间：2024 1 11
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I'm trying to plot the figure below, but I don't really understand what function to use to achieve this.
β is defined as , where the T used is for low temperature
I tried using syms delta and fplot(@(delta) U) but that doesn't seem right.

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回答（1 个）

Paul
Paul 2024-1-11
Ran in:

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Ran in:
syms U Delta beta T k_beta
U = -Delta/2*tanh(beta*Delta/2)
U = 
UoverDelta = U/Delta
UoverDelta = 
UoverDelta = subs(UoverDelta,beta,inv(k_beta*T))
UoverDelta = 
syms w
UoverDelta = subs(UoverDelta,k_beta*T/Delta,w)
UoverDelta = 
figure
fplot(UoverDelta,[0 10])
ylim([-1 0])

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Paul
Paul
2024-1-11

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