Ca+quantum bits for quantum information processing
Jan Benhelm, Gerhard Kirchmair, R. Gerritsma, F. Zähringer, Thomas Monz, Philipp Claudius Schindler, Michael Chwalla, W. Hänsel, Markus Hennrich, Christian F. Roos, R. Blatt · Physica Scripta · 2009
With trapped ions quantum information can be encoded in various two-level systems or quantum bits (qubits). Here, we present an overview on qubit encoding with Ca + and several state-of-the-art operations involving two and three qubits. The use of decoherence-free subspaces and encoding logical qubits using two physical qubits may offer an advantageous route towards implementing scalable quantum information processing.