@article{Poschinger_2009,
	doi = {10.1088/0953-4075/42/15/154013},
	url = {https://doi.org/10.1088/0953-4075/42/15/154013},
	year = 2009,
	month = {jul},
	publisher = {{IOP} Publishing},
	volume = {42},
	number = {15},
	pages = {154013},
	author = {U G Poschinger and G Huber and F Ziesel and M Dei{\ss} and M Hettrich and S A Schulz and K Singer and G Poulsen and M Drewsen and R J Hendricks and F Schmidt-Kaler},
	title = {Coherent manipulation of a40Ca$\mathplus$spin qubit in a micro ion trap},
	journal = {Journal of Physics B: Atomic, Molecular and Optical Physics},
	abstract = {We demonstrate the implementation of a spin qubit with a single 40Ca+ ion in a micro ion trap. The qubit is encoded in the Zeeman ground state levels mJ = +1/2 and mJ = −1/2 of the S1/2 state of the ion. We show sideband cooling close to the vibrational ground state and demonstrate the initialization and readout of the qubit levels with 99.5% efficiency. We employ a Raman transition close to the S1/2–P1/2 resonance for coherent manipulation of the qubit. We observe single qubit rotations with 96% fidelity and gate times below 5 µs. Rabi oscillations on the blue motional sideband are used to extract the phonon number distribution. The dynamics of this distribution is analysed to deduce the trap-induced heating rate of 0.3(1) phonons ms−1.}
}