Physics – Quantum Physics
Scientific paper
2004-02-06
Physics
Quantum Physics
12 pages, 5 figures
Scientific paper
We consider quantum gates for trapped ions using state-selective displacement of the ions. We generalize earlier work in order to treat arbitrary separations between the traps. This requires the impact of anharmonicity arising from the Coulomb interaction to be estimated. We show that its effects are always small enough to allow high fidelity. In particular, the method can be applied to two ions in the same trap. We also show that gates between non-neighbour ions, and hence a Toffoli (three-qubit controlled-NOT) gate, can be achieved. We discuss how the gate can be applied to logical qubits encoded in the decoherence-free-subspace {|01>,|10>}, where each pair of ions stores a single qubit. We also suggest alternatives to the spin-echo method to suppress unwanted terms in the evolution.
Sasura Marek
Steane Andrew
No associations
LandOfFree
Further quantum-gate methods using selective displacement of trapped ions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Further quantum-gate methods using selective displacement of trapped ions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Further quantum-gate methods using selective displacement of trapped ions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-508333