Text this: Kraus representation for the density operator of a qubit

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    ___   | || | ||  /_   _//  /_   _//   ____    
   /   || | || | ||  `-| |,-    -| ||-   |    \\  
  | [] || | \\_/ ||    | ||     _| ||_   | [] ||  
   \__ ||  \____//     |_||    /_____//  |  __//  
    -|_||   `---`      `-`'    `-----`   |_|`-`   
     `-`                                 `-`