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Updated: Jun 25, 2026
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
A new quantum control scheme for multilevel systems based on effective decomposition by intense laser fields.
1Department of Fundamental Science and Technology, Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. michi@chem.keio.ac.jp
The Journal of Chemical Physics
|March 12, 2009
Summary
A novel quantum control scheme effectively isolates multilevel systems using intense lasers. This method manipulates coherent dynamics and suppresses dissipation in quantum systems.
Area of Science:
- Quantum Control
- Laser Physics
- Quantum Dynamics
Background:
- Controlling quantum systems with multiple energy levels is challenging.
- Dissipative processes can disrupt desired quantum dynamics.
- Precisely manipulating quantum states requires advanced techniques.
Purpose of the Study:
- To propose a new quantum control scheme for general multilevel systems.
- To effectively isolate a target subspace within these systems.
- To demonstrate control over both coherent and dissipative dynamics.
Main Methods:
- Utilizing intense continuous-wave (cw) lasers under specific conditions.
- Employing the Green function method combined with projection operators.
- Developing an effective Hamiltonian to govern the isolated subspace dynamics.
Main Results:
- The proposed scheme successfully isolates target quantum levels.
- Coherent population dynamics can be manipulated effectively.
- Dissipative effects within the system are significantly suppressed.
Conclusions:
- The developed quantum control scheme offers precise manipulation of multilevel systems.
- It provides a method to overcome decoherence and control quantum dynamics.
- This approach is applicable to various quantum systems, including those with dissipation.
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