Reduction of Trapped-Ion Anomalous Heating by in situ Surface Plasma Cleaning
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MIT Lincoln Laboratory Lexington United States
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Anomalous motional heating represents a major obstacle to scalable quantum information processing with trapped ions. While the source of this heating is not yet understood, several previous studies 1-3 suggest that surface contaminants may be largely responsible. We demonstrate an improvement by a factor of four in the room-temperature heating rate of a niobium surface electrode trap by in situ plasma cleaning of the trap surface. This surface treatment was performed with a simple homebuilt coil assembly and commercially-available matching network and produces less surface heating than other treatments, such as ion milling or laser cleaning, that have previously been shown to improve heating rates. The observed heating-rate reduction persists for at least several days if the system is maintained under ultra-high-vacuum conditions.
- Particle Accelerators
- Plasma Physics and Magnetohydrodynamics