article{Ivanov_2010,
   title={Quantum gate in the decoherence-free subspace of trapped-ion qubits},
   volume={92},
   ISSN={1286-4854},
   url={http://dx.doi.org/10.1209/0295-5075/92/30006},
   DOI={10.1209/0295-5075/92/30006},
   number={3},
   journal={EPL (Europhysics Letters)},
   publisher={IOP Publishing},
   author={Ivanov, P. A. and Poschinger, U. G. and Singer, K. and Schmidt-Kaler, F.},
   year={2010},
   month={Nov},
   pages={30006}
}