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| author | Eugeniy Mikhailov <evgmik@gmail.com> | 2009-12-09 19:47:57 +0000 |
|---|---|---|
| committer | Eugeniy Mikhailov <evgmik@gmail.com> | 2009-12-09 19:47:57 +0000 |
| commit | d0071faa593907567ffafc0fedf63f209ab1293f (patch) | |
| tree | 67a8dd108a5bfe8464304c0698ea204aa225095b | |
| parent | 13d34ca7ec36b7d6ab937a8333d5cea7dc3aa69c (diff) | |
| download | multi_mode_eit-d0071faa593907567ffafc0fedf63f209ab1293f.tar.gz multi_mode_eit-d0071faa593907567ffafc0fedf63f209ab1293f.zip | |
moved some useful functions to separate file
| -rw-r--r-- | liouville.m | 31 | ||||
| -rw-r--r-- | useful_functions.m | 30 |
2 files changed, 35 insertions, 26 deletions
diff --git a/liouville.m b/liouville.m index 0673a7e..5987925 100644 --- a/liouville.m +++ b/liouville.m @@ -1,3 +1,7 @@ + +% load useful functions; +useful_functions; + % some physical constants hbar=1; im_one=0+1i; @@ -5,6 +9,7 @@ im_one=0+1i; three_levels; %two_levels; + Nfreq=length(modulation_freq); % now we create Liouville indexes list @@ -35,21 +40,6 @@ L=zeros(N); % NxN matrix Li=zeros(N); % NxN Liouville interactive L0=zeros(N); % NxN Liouville from unperturbed hamiltonian -function ret=decay_total(g_decay,i) - ret=0; - for k=1:size(g_decay)(1) - ret=ret+g_decay(i,k); - endfor -endfunction - -function ret=kron_delta(i,j) - if ((i==j)) - ret=1; - else - ret=0; - endif -endfunction - for p=1:N for s=1:N j=rhoLiouville_r(p); @@ -124,17 +114,6 @@ rhoLiouville_dot(1)=1; %solving for density matrix vector rhoLiouville=L\rhoLiouville_dot; -% this function create from Liouville density vector -% the density matrix with given modulation frequency -function rho=rhoOfFreq(rhoLiouville, freqIndex, Nlevels, Nfreq) - rho=zeros(Nlevels); - for r=1:Nlevels - for c=1:Nlevels - rho(r,c)=rhoLiouville((freqIndex-1)*Nlevels^2+(r-1)*Nlevels+c); - endfor - endfor -endfunction - rho_0=rhoOfFreq(rhoLiouville, 1, Nlevels, Nfreq) rho_1=rhoOfFreq(rhoLiouville, 2, Nlevels, Nfreq) diff --git a/useful_functions.m b/useful_functions.m new file mode 100644 index 0000000..748a677 --- /dev/null +++ b/useful_functions.m @@ -0,0 +1,30 @@ +1; + +% calculate total decay for particular level taking in account all branches +function ret=decay_total(g_decay,i) + ret=0; + for k=1:size(g_decay)(1) + ret=ret+g_decay(i,k); + endfor +endfunction + +% kroneker delta symbol +function ret=kron_delta(i,j) + if ((i==j)) + ret=1; + else + ret=0; + endif +endfunction + +% this function create from Liouville density vector +% the density matrix with given modulation frequency +function rho=rhoOfFreq(rhoLiouville, freqIndex, Nlevels, Nfreq) + rho=zeros(Nlevels); + for r=1:Nlevels + for c=1:Nlevels + rho(r,c)=rhoLiouville((freqIndex-1)*Nlevels^2+(r-1)*Nlevels+c); + endfor + endfor +endfunction + |