A Radio-Frequency Ion Trap for Quantum Information Science with Yb+ Ions
A Radio-Frequency Ion Trap for Quantum Information Science with Yb+ Ions
View/Type of Scholarly Publication
DissertationDate of Exam
05.05.2026Date of Publication
27.08.2026Advisor
Köhl, MichaelCo-Referee
Linden, StefanMetadata
Show full item record
Citable Links 
Abstract
In this thesis, the next generation of the ion trapping setup has been designed, constructed, and successfully implemented for studying quantum information science at the University of Bonn.
The new setup is designed to include an optical cavity as the endcap electrodes of a linear radio-frequency ion trap. In view of this, a novel method to drive the linear ion trap is invented to apply two-phase radio-frequency voltage. In addition to this, a new method to directly bias all the electrodes of the ion trap with DC voltages is implemented in order to control the static electric fields along all directions. Using these methods, over 6 ytterbium ions in a linear Coulomb crystal can been trapped, and radial trapping frequencies of over 1.2 MHz have been observed using the aforementioned methods. Low axial-micromotion for over 65 µm along the axis of the ion trap has been observed, although the endcap electrodes are just as close to the trapped ions as the linear electrodes.
In view of finding a novel approach for photonic interfacing the Yb ions, the lower-lying energy levels involving inner-shell electron excitations are investigated in this thesis. By considering their properties, the 2D3/2 → 4f13 (2Fo5/2)5d6s(3D) 3[5/2]o3/2 transition is successfully interrogated using direct laser excitation for the first time to the best of my knowledge. The transition frequency is measured to be 603013350 ± 162 MHz for the isotope 174Yb.
In addition to the study of quantum information science, the new ion trap -- optical cavity setup is also considered for the experimental investigation of microscopic thermodynamics. In view of this, the Hamiltonian of the complete system is derived and compared with the theoretical models of Hamiltonian engines. Various non-linear terms occurring in the system Hamiltonian are described for studying the concept of ignition in a future single ion engine in our linear ion trap.
The new setup is designed to include an optical cavity as the endcap electrodes of a linear radio-frequency ion trap. In view of this, a novel method to drive the linear ion trap is invented to apply two-phase radio-frequency voltage. In addition to this, a new method to directly bias all the electrodes of the ion trap with DC voltages is implemented in order to control the static electric fields along all directions. Using these methods, over 6 ytterbium ions in a linear Coulomb crystal can been trapped, and radial trapping frequencies of over 1.2 MHz have been observed using the aforementioned methods. Low axial-micromotion for over 65 µm along the axis of the ion trap has been observed, although the endcap electrodes are just as close to the trapped ions as the linear electrodes.
In view of finding a novel approach for photonic interfacing the Yb ions, the lower-lying energy levels involving inner-shell electron excitations are investigated in this thesis. By considering their properties, the 2D3/2 → 4f13 (2Fo5/2)5d6s(3D) 3[5/2]o3/2 transition is successfully interrogated using direct laser excitation for the first time to the best of my knowledge. The transition frequency is measured to be 603013350 ± 162 MHz for the isotope 174Yb.
In addition to the study of quantum information science, the new ion trap -- optical cavity setup is also considered for the experimental investigation of microscopic thermodynamics. In view of this, the Hamiltonian of the complete system is derived and compared with the theoretical models of Hamiltonian engines. Various non-linear terms occurring in the system Hamiltonian are described for studying the concept of ignition in a future single ion engine in our linear ion trap.
Subjects
Quantum Information, Trapped Ions, Ion traps, Yb ion
Classification (DDC)
530 PhysikRelated Publications
arXiv:2602.07700Surendra, Santhosh: A Radio-Frequency Ion Trap for Quantum Information Science with Yb+ Ions. - Bonn, 2026. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn.
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5-92052
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5-92052
@phdthesis{handle:20.500.11811/14415,
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5-92052,
doi: https://doi.org/10.48565/bonndoc-950,
author = {{Santhosh Surendra}},
title = {A Radio-Frequency Ion Trap for Quantum Information Science with Yb+ Ions},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2026,
month = aug,
note = {In this thesis, the next generation of the ion trapping setup has been designed, constructed, and successfully implemented for studying quantum information science at the University of Bonn.
The new setup is designed to include an optical cavity as the endcap electrodes of a linear radio-frequency ion trap. In view of this, a novel method to drive the linear ion trap is invented to apply two-phase radio-frequency voltage. In addition to this, a new method to directly bias all the electrodes of the ion trap with DC voltages is implemented in order to control the static electric fields along all directions. Using these methods, over 6 ytterbium ions in a linear Coulomb crystal can been trapped, and radial trapping frequencies of over 1.2 MHz have been observed using the aforementioned methods. Low axial-micromotion for over 65 µm along the axis of the ion trap has been observed, although the endcap electrodes are just as close to the trapped ions as the linear electrodes.
In view of finding a novel approach for photonic interfacing the Yb ions, the lower-lying energy levels involving inner-shell electron excitations are investigated in this thesis. By considering their properties, the 2D3/2 → 4f13 (2Fo5/2)5d6s(3D) 3[5/2]o3/2 transition is successfully interrogated using direct laser excitation for the first time to the best of my knowledge. The transition frequency is measured to be 603013350 ± 162 MHz for the isotope 174Yb.
In addition to the study of quantum information science, the new ion trap -- optical cavity setup is also considered for the experimental investigation of microscopic thermodynamics. In view of this, the Hamiltonian of the complete system is derived and compared with the theoretical models of Hamiltonian engines. Various non-linear terms occurring in the system Hamiltonian are described for studying the concept of ignition in a future single ion engine in our linear ion trap.},
url = {https://hdl.handle.net/20.500.11811/14415}
}
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5-92052,
doi: https://doi.org/10.48565/bonndoc-950,
author = {{Santhosh Surendra}},
title = {A Radio-Frequency Ion Trap for Quantum Information Science with Yb+ Ions},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2026,
month = aug,
note = {In this thesis, the next generation of the ion trapping setup has been designed, constructed, and successfully implemented for studying quantum information science at the University of Bonn.
The new setup is designed to include an optical cavity as the endcap electrodes of a linear radio-frequency ion trap. In view of this, a novel method to drive the linear ion trap is invented to apply two-phase radio-frequency voltage. In addition to this, a new method to directly bias all the electrodes of the ion trap with DC voltages is implemented in order to control the static electric fields along all directions. Using these methods, over 6 ytterbium ions in a linear Coulomb crystal can been trapped, and radial trapping frequencies of over 1.2 MHz have been observed using the aforementioned methods. Low axial-micromotion for over 65 µm along the axis of the ion trap has been observed, although the endcap electrodes are just as close to the trapped ions as the linear electrodes.
In view of finding a novel approach for photonic interfacing the Yb ions, the lower-lying energy levels involving inner-shell electron excitations are investigated in this thesis. By considering their properties, the 2D3/2 → 4f13 (2Fo5/2)5d6s(3D) 3[5/2]o3/2 transition is successfully interrogated using direct laser excitation for the first time to the best of my knowledge. The transition frequency is measured to be 603013350 ± 162 MHz for the isotope 174Yb.
In addition to the study of quantum information science, the new ion trap -- optical cavity setup is also considered for the experimental investigation of microscopic thermodynamics. In view of this, the Hamiltonian of the complete system is derived and compared with the theoretical models of Hamiltonian engines. Various non-linear terms occurring in the system Hamiltonian are described for studying the concept of ignition in a future single ion engine in our linear ion trap.},
url = {https://hdl.handle.net/20.500.11811/14415}
}
The following license files are associated with this item:
