Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

AIP conference proceedings

Barium Ions for Quantum Computation

Matthew Dietrich, A. Avril, R. Bowler, Nathan Kurz, J.S. Salacka, Gang Shu, B. B. Blinov, James R. Danielson, T. S. Pedersen

Published Jan 1, 2009• 17 citations
Publisher

Abstract

Individually trapped 137Ba+ in an RF Paul trap is proposed as a qubit candidate, and its various benefits are compared to other ionic qubits. We report the current experimental status of using this ion for quantum computation. Future plans and prospects are discussed.
DOI
10.1063/1.3122286

Related papers

Barium ions for quantum computation

Matthew Dietrich

Abstract. Individually trapped 137 Ba + in an RF Paul trap is proposed as a qubit candidate, and its various benefits are compared to other ionic qubits. We report the current experimental status of using this ion for quantum computation. Future plans and prospects are discussed.

•Jan 1, 2009•0 citations

Barium Ions for Quantum Computation

Matthew Dietrich, A. Avril, R. Bowler +4 more

Individually trapped 137Ba+ in an RF Paul trap is proposed as a qubit ca ndidate, and its various benefits are compared to other ionic qubits. We report the current experimental status of using this ion for quantum computation. Fut ure plans and prospects are discussed.

arXiv:0905.2701•May 16, 2009•0 citations

Microchip Paul trap for quantum computing with 171Yb+ ions

Nikita O. Zhadnov, K. S. Kudeyarov, Ilya Gerasin +3 more

In the realm of creating hardware for quantum computing, the utilization of ion qubits is one of the most advanced areas. In recent years, there has been a shift in this field from using bulk ion traps to planar ones, offering better scalability. We will present the initial results of our work on the microchip-based ion quantum processor project and discuss the primary experimental challenges faced in the project, along with its future goals and plans.

International Conference Laser Optics (ICLO)•Jul 1, 2024•0 citations

Research progress of ion trap quantum computing

Yukai Wu, Luming Duan

Ion trap is one of the leading physical platforms to implement quantum computation. Currently, high-fidelity elementary quantum operations above the fault-tolerant threshold, including state preparation, measurement and universal gates, have been demonstrated for tens of ionic qubits. One important future research direction is to further enlarge the qubit number to the scale required for solving practical problems while maintaining the high performance of individual qubits. This paper introduces the current mainstream schemes for scalable ion trap quantum computation like quantum charge-coupled device (QCCD) and ion-photon quantum network, and describes the main limiting factors in current research. Then we further explore new schemes to scale up the qubit number like two-dimensional ion crystals and dual-type qubit, and discuss the future research directions.

Acta Physica Sinica•Jan 1, 2023•7 citations

Measuring Trapped Ion Qudits

Brendan Bramman

Quantum information has typically focused on using 2-level qubits to perform simulation and computation. We propose to expand the number of levels for computation using qudits, where \\(d>2\\). Doing so could be a viable option for making trapped ion systems scalable for quantum computation. Our group in particular will use Barium ions because of some energy features and convenient laser wavelengths. This thesis presents much of the necessary background needed to work with Barium as a qudit for quantum computation. Energy structure, branching ratios, and saturation intensities are derived and presented. In addition, a method for selecting different isotopes of Barium for trapping is discussed. A method for measuring out the state of a Barium qudit is presented, with error rates estimated to be under \\(1\\%\\) for up to 5-level qudits. Finally, various optics projects which were necessary for building up our first ion trap are outlined.

•Sep 26, 2019•1 citation

Experiments with remote entanglement using single barium ions

Nathan Kurz

Barium ions are trapped and Doppler cooled in a linear Paul trap with the goal of demonstrating state initialization, single-qubit operations and detection. Rabi rotations are demonstrated on the 6S1/2 ↔ 6P3/2 transition using single pulses from a mode-locked Ti:Sapphire laser, and some evidence for the same on the more useful 6S1/2] ↔ 6P1/2 transition is shown. With the goal of entangling the polarization mode of emitted photons with the spin state of the ion in the trap in mind, single photon generation and detection ability is demonstrated. A stabilized 1.762 µm laser is used on the 6S1/2 → 5D5/2 transition to demonstrate the ability to state selectively shelve the ion from the ground state to be used as readout. Using the techniques that will enable qubit operations and readout, several quantities of interest in 137Ba+ are measured either for the first time or to higher accuracy than previously achieved.

•Jan 1, 2010•0 citations
Ion trap is one of the leading physical platforms to implement quantum computation. Currently, high-fidelity elementary quantum operations above the fault-tolerant threshold, including state preparation, measurement and universal gates, have been demonstrated for tens of ionic qubits. One important future research direction is to further enlarge the qubit number to the scale required for solving practical problems while maintaining the high performance of individual qubits. This paper introduces the current mainstream schemes for scalable ion trap quantum computation like quantum charge-coupled device (QCCD) and ion-photon quantum network, and describes the main limiting factors in current research. Then we further explore new schemes to scale up the qubit number like two-dimensional ion crystals and dual-type qubit, and discuss the future research directions.
Quantum information has typically focused on using 2-level qubits to perform simulation and computation. We propose to expand the number of levels for computation using qudits, where \\(d>2\\). Doing so could be a viable option for making trapped ion systems scalable for quantum computation. Our group in particular will use Barium ions because of some energy features and convenient laser wavelengths. This thesis presents much of the necessary background needed to work with Barium as a qudit for quantum computation. Energy structure, branching ratios, and saturation intensities are derived and presented. In addition, a method for selecting different isotopes of Barium for trapping is discussed. A method for measuring out the state of a Barium qudit is presented, with error rates estimated to be under \11\\%\1 for up to 5-level qudits. Finally, various optics projects which were necessary for building up our first ion trap are outlined.
Barium ions are trapped and Doppler cooled in a linear Paul trap with the goal of demonstrating state initialization, single-qubit operations and detection. Rabi rotations are demonstrated on the 6S1/2 ↔ 6P3/2 transition using single pulses from a mode-locked Ti:Sapphire laser, and some evidence for the same on the more useful 6S1/2] ↔ 6P1/2 transition is shown. With the goal of entangling the polarization mode of emitted photons with the spin state of the ion in the trap in mind, single photon generation and detection ability is demonstrated. A stabilized 1.762 µm laser is used on the 6S1/2 → 5D5/2 transition to demonstrate the ability to state selectively shelve the ion from the ground state to be used as readout. Using the techniques that will enable qubit operations and readout, several quantities of interest in 137Ba+ are measured either for the first time or to higher accuracy than previously achieved.