أرسل هذا في رسالة قصيرة: Spin Currents in a Coherent Exciton Gas

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