Text this: Mutually unbiased bases for the rotor degree of freedom

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