Simple manipulation of a microwave dressed-state ion qubit

Phys Rev Lett. 2013 Oct 4;111(14):140501. doi: 10.1103/PhysRevLett.111.140501. Epub 2013 Oct 2.


Many schemes for implementing quantum information processing require that the atomic states used have a nonzero magnetic moment; however, such magnetically sensitive states of an atom are vulnerable to decoherence due to fluctuating magnetic fields. Dressing an atom with external fields is a powerful method of reducing such decoherence [N. Timoney et al., Nature (London) 476, 185 (2011)]. We introduce an experimentally simpler method of manipulating such a dressed-state qubit, which allows the implementation of general rotations of the qubit, and demonstrate this method using a trapped ytterbium ion.