Second Element is not 1 but It is coming as 1

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Gözde Üstün 2020-6-25

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https://ww2.mathworks.cn/matlabcentral/answers/554929-second-element-is-not-1-but-it-is-coming-as-1

评论： Gözde Üstün 2020-6-26

采纳的回答： madhan ravi

在 MATLAB Online 中打开

Hello,

I have this matrix:

I saved this matrix in a list like : projectors_of_sigma_x_minus_sigma_z = [[(sqrt(2)-1);1],[(-sqrt(2)-1);1]];

and this is my code :

function B = CHSHmeasurement
    B=zeros(2,2,2,2);
   
    projectors_of_sigma_x_minus_sigma_z = [[(sqrt(2)-1);1],[(-sqrt(2)-1);1]];
    B(:,:,2,1) = projectors_of_sigma_x_minus_sigma_z(1);
    B(:,:,2,2) = projectors_of_sigma_x_minus_sigma_z(2);
end

But I have this result:

However I have not 1 as the second element of projectors_of_sigma_x_minus_sigma_z. I have [(-sqrt(2)-1);1] for the second element of projectors_of_sigma_x_minus_sigma_z(2); Where am I wrong ?

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采纳的回答

madhan ravi 2020-6-25

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/554929-second-element-is-not-1-but-it-is-coming-as-1#answer_457219

编辑：madhan ravi 2020-6-25

在 MATLAB Online 中打开

>> B=zeros(2,2,2,2);
   projectors_of_sigma_x_minus_sigma_z = [[(sqrt(2)-1);1],[(-sqrt(2)-1);1]]
   B(:,:,2,1) = projectors_of_sigma_x_minus_sigma_z(1)
   B(:,:,2,2) = projectors_of_sigma_x_minus_sigma_z(2)
projectors_of_sigma_x_minus_sigma_z =
    0.4142   -2.4142
    1.0000    1.0000
B(:,:,1,1) =
     0     0
     0     0
B(:,:,2,1) =
    0.4142    0.4142
    0.4142    0.4142
B(:,:,1,2) =
     0     0
     0     0
B(:,:,2,2) =
     0     0
     0     0
B(:,:,1,1) =
     0     0
     0     0
B(:,:,2,1) =
    0.4142    0.4142
    0.4142    0.4142
B(:,:,1,2) =
     0     0
     0     0
B(:,:,2,2) =
     1     1
     1     1
>> 