Sympathetic cooling schemes for separately trapped ions coupled via image currents

authored by
C. Will, M. Bohman, T. Driscoll, M. Wiesinger, F. Abbass, M. J. Borchert, J. A. Devlin, S. Erlewein, M. Fleck, B. Latacz, R. Moller, A. Mooser, D. Popper, E. Wursten, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, C. Smorra, S. Ulmer

Cooling of particles to mK-temperatures is essential for a variety of experiments with trapped charged particles. However, many species of interest lack suitable electronic transitions for direct laser cooling. We study theoretically the remote sympathetic cooling of a single proton with laser-cooled 9Be+ in a double-Penning-trap system. We investigate three different cooling schemes and find, based on analytical calculations and numerical simulations, that two of them are capable of achieving proton temperatures of about 10 mK with cooling times on the order of 10 s. In contrast, established methods such as feedback-enhanced resistive cooling with image-current detectors are limited to about 1 K in 100 s. Since the studied techniques are applicable to any trapped charged particle and allow spatial separation between the target ion and the cooling species, they enable a variety of precision measurements based on trapped charged particles to be performed at improved sampling rates and with reduced systematic uncertainties.

Institute of Quantum Optics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
External Organisation(s)
Max Planck Institute for Nuclear Physics
Ulmer Fundamental Symmetries Laboratory
University of Texas at Austin
Johannes Gutenberg University Mainz
National Metrology Institute of Germany (PTB)
University of Tokyo
GSI Helmholtz Centre for Heavy Ion Research
Helmholtz-Institut Mainz
New journal of physics
No. of pages
Publication date
Publication status
Peer reviewed
ASJC Scopus subject areas
Physics and Astronomy(all)
Electronic version(s) (Access: Open) (Access: Open)