Indirect Cooling of Weakly Coupled Trapped-Ion Mechanical Oscillators

verfasst von

Pan Yu Hou, Jenny J. Wu, Stephen D. Erickson, Giorgio Zarantonello, Adam D. Brandt, Daniel C. Cole, Andrew C. Wilson, Daniel H. Slichter, Dietrich Leibfried

Abstract

Cooling the motion of trapped ions to near the quantum ground state is crucial for many applications in quantum information processing and quantum metrology. However, certain motional modes of trapped-ion crystals can be difficult to cool due to weak or zero interaction between the modes and the cooling radiation, typically laser beams. We overcome this challenge by coupling a mode that interacts weakly with cooling radiation to one that interacts strongly with cooling radiation using parametric modulation of the trapping potential, thereby enabling indirect cooling of the weakly interacting mode. In this way, we demonstrate near-ground-state cooling of motional modes with weak or zero cooling radiation interaction in multi-ion crystals of the same and mixed ion species, specifically Be+9-Be+9, Be+9-Mg+25, and Be+9-Mg+25-Be+9 crystals. This approach can be generally applied to any Coulomb crystal where certain motional modes cannot be directly cooled efficiently, including crystals containing molecular ions, highly charged ions, charged fundamental particles, or charged macroscopic objects.

Organisationseinheit(en)

Institut für Quantenoptik

Externe Organisation(en)

National Institute of Standards and Technology (NIST)
University of Colorado Boulder
Tsinghua University
Quantinuum
ColdQuanta, Inc.

Typ

Artikel

Journal

Physical Review X

Band

14

ISSN

2160-3308

Publikationsdatum

02.04.2024

Publikationsstatus

Elektronisch veröffentlicht (E-Pub)

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Elektronische Version(en)

https://doi.org/10.48550/arXiv.2308.05158 (Zugang: Offen)
https://doi.org/10.1103/PhysRevX.14.021003 (Zugang: Offen)