Compatibility of trapped ions and dielectrics at cryogenic temperatures

• URL: http://arxiv.org/abs/2506.15057v1
• Date: Wed, 18 Jun 2025 01:37:55 GMT
• Title: Compatibility of trapped ions and dielectrics at cryogenic temperatures
• Authors: M. Bruff, L. Sonderhouse, K. N. David, J. Stuart, D. H. Slichter, D. Leibfried,
• Abstract summary: We study the impact of an unshielded ion fiber on a cryogenic surface ion traps.<n>These results demonstrate the viability using unshielded ion traps.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study the impact of an unshielded dielectric $\unicode{x2013}$ here, a bare optical fiber $\unicode{x2013}$ on a $^{40}$Ca${^+}$ ion held several hundred $\mu$m away in a cryogenic surface electrode trap. We observe distance-dependent stray electric fields of up to a few kV/m due to the dielectric, which drift on average less than 10% per month and can be fully compensated with reasonable voltages on the trap electrodes. We observe ion motional heating rates attributable to the dielectric of $\approx$30 quanta per second at an ion-fiber distance of 215(4) $\mu$m and $\approx$1.5 MHz motional frequency. These results demonstrate the viability of using unshielded, trap-integrated dielectric objects such as miniature optical cavities or other optical elements in cryogenic surface electrode ion traps.

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