Implementation of a symmetric surface electrode ion trap with field compensation using a modulated Raman effect
(2009)
Scalable simultaneous multi-qubit readout with 99.99% single-shot fidelity
(2009)
Memory coherence of a sympathetically cooled trapped-ion qubit
Physical Review A - Atomic, Molecular, and Optical Physics 79:5 (2009)
Abstract:
We demonstrate sympathetic cooling of a C 43 a+ trapped-ion "memory" qubit by a C 40 a+ "coolant" ion sufficiently near the ground state of motion for fault-tolerant quantum logic, while maintaining coherence of the qubit. This is an essential ingredient in trapped-ion quantum computers. The isotope shifts are sufficient to suppress decoherence and phase shifts of the memory qubit due to the cooling light which illuminates both ions. We measure the qubit coherence during ten cycles of sideband cooling, finding a coherence loss of 3.3% per cooling cycle. The natural limit of the method is O (10-4) infidelity per cooling cycle. 漏 2009 The American Physical Society.Memory coherence of a sympathetically cooled trapped-ion qubit
PHYSICAL REVIEW A 79:5 (2009) ARTN 050305
Memory coherence of a sympathetically cooled trapped-ion qubit
(2008)