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Updated: Jul 13, 2026
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Phase-locked laser system for a metastable states qubit in 40 Ca+
Rekishu Yamazaki1, Toshiki Iwai, Kenji Toyoda
1JST-CREST, Kawaguchi, Saitama 331-0012, Japan. rekishu@qe.ee.es.osaka-u.ac.jp
Optics Letters
|August 3, 2007
Summary
We developed a phase-locked laser system for quantum information processing using calcium-40 ions. This system enables precise qubit control via Raman transitions, offering advantages over conventional methods.
Area of Science:
- Quantum Information Science
- Atomic Physics
- Laser Spectroscopy
Background:
- Ion-trap quantum processors offer robust qubit platforms.
- Precise control of atomic states is crucial for quantum computation.
- Calcium-40 ions provide a promising qubit system.
Purpose of the Study:
- To develop and characterize a phase-locked laser system for a (40)Ca(+) ion-trap quantum processor.
- To enable Raman transitions for qubit manipulation.
- To compare the developed system's performance with existing approaches.
Main Methods:
- Phase-locking an extended cavity diode laser (850 nm) and a Ti:sapphire laser (854 nm).
- Utilizing the phase-locked lasers to excite a Raman transition.
- Targeting the D(3/2) and D(5/2) metastable states of the (40)Ca(+) qubit.
Main Results:
- Successful development of a stable, phase-locked laser system.
- Demonstration of qubit excitation via Raman transitions.
- Characterization of the laser system's performance and qubit coupling.
Conclusions:
- The developed phase-locked laser system is suitable for (40)Ca(+) ion-trap quantum processors.
- The system offers improved qubit coupling characteristics compared to conventional methods.
- This work advances the development of scalable quantum information technologies.
