@article{shao:1998:ddt,
    author = {Shao, Jiushu  and H\"anggi, Peter},
     title = {Decoherent dynamics of a two-level system coupled to a sea of spins},
   journal = {Phys. Rev. Lett.},
    volume = {81},
    number = {26},
     pages = {5710–5713},
      year = {1998},
       doi = {10.1103/PhysRevLett.81.5710},
 publisher = {American Physical Society}}