how to plot a defined function ?
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hi. i coded 2 functions. now i want to plot N(t) versus T. but it gives me errors. plz help me to do that.
clear;
T=0:0.1:14;
plot(T,N(t))
function pa = partialtranspos(T)
J=1;B=4;d=4;
s0=[1 0;0 1];
sx=[0 1;1 0];
sy=[0 -1i;1i 0];
sz=[1 0;0 -1];
H = 2*J*kron(sz,sz)+B*(kron(sz,s0)+kron(s0,sz))+d*(kron(sx,sy)-kron(sy,sx));
ro = expm(-H/T)/trace(expm(-H/T));
pa = [ro(1,1) ro(2,1) ro(1,3) ro(2,3);ro(1,2) ro(2,2) ro(1,4) ro(2,4);
ro(3,1) ro(4,1) ro(3,3) ro(4,3);ro(3,2) ro(4,2) ro(3,4) ro(4,4)];
end
function ne = N(T)
ne=0.5*(sum(abs(eig(partialtranspose(T))))-1);
end
댓글 수: 1
Adam
2019년 10월 22일
If it gives you errors then post the error messages here to make it easier for people to help.
답변 (1개)
reza hamzeh
2019년 10월 22일
댓글 수: 1
Christine Tobler
2019년 10월 28일
H is a square matrix, while T is a row vector. The operation H / T is not supported, because this is trying to compute X which solves the linear system X*T = H, which is not possible when H is of size 4-by-4 and T is of size 1-by-141.
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