Time evolution of eigenvale

[mehrosadate...@gmail.com]

Hello,

I have a problem. I have a time dependent Hamiltonian (H(t) = H_0 + s(t)*H_1).
I want to plot the time evolution of eigenvalues according to time. But I do not know how!!!
Can you please help me?

Regards
Mehrosadat

[mehrosadate...@gmail.com]

Hello,

Related to my previous question, my code is in this way:

import time
from pylab import*
import numpy as np
from qutip import *
from math import sqrt
import matplotlib.pyplot as plt
times= np.linspace(0,0.168,200)
I=tensor(qeye(2),qeye(2),qeye(2))
psi1=(fock(2,0)-fock(2,1)).unit()
psii=tensor(psi1,psi1,psi1)
sz1=tensor(sigmaz(),qeye(2),qeye(2))
sz2=tensor(qeye(2),sigmaz(),qeye(2))
sz3=tensor(qeye(2),qeye(2),sigmaz())
sx1=tensor(sigmax(),qeye(2),qeye(2))
sx2=tensor(qeye(2),sigmax(),qeye(2))
sx3=tensor(qeye(2),qeye(2),sigmax())
H0=30*(sx1+sx2+sx3)
H1=-210*I+84*sz1+88*sz2+44*sz3-20*sz1*sz2-10*sz1*sz3+20*sz2*sz3-16*sz1*sz2*sz3-30*(sx1+sx2+sx3)
def H1_coeff(t,args):return -(times/0.168)**2
H=[H0, [H1,H1_coeff]]
result=mesolve(H,psii,times,[],[H])

but in the last line, I receive AttributeError: 'list' object has no attribute 'isherm' !!!
I do not know what is my problem and what should I do.

Can you please help me?

Regards
Mehrosadat

[Paul Nation]

You need to update to the latest development version on GitHub.

-P

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[mehrosadate...@gmail.com]

Does not it need that I change last line to:
result=mesolve(H,psii,times,[],[],progress_bar=None,options=None,None,[sz1]) ??
although, in this way I receive
SyntaxError: non-keyword arg after keyword arg !!!

Is there any problem?

Thanks
Mehrosadat

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