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Active Suppression of Quantum Dephasing in Resonantly Driven Ensembles
1Department of Physics, University of Virginia, Charlottesville, Virginia 22904-4714, USA.
Physical Review Letters
|February 9, 2024
Summary
We used quantum control to overcome atom position randomness, observing dipole-dipole Rabi oscillations in Rydberg atoms. This technique enhances population transfer, benefiting many-body quantum control applications.
Area of Science:
- Quantum physics
- Atomic physics
- Quantum optics
Background:
- Coherent population transfer is sensitive to atom position variations.
- Rydberg atoms enable strong dipole-dipole interactions.
- Controlling many-body quantum systems is challenging.
Purpose of the Study:
- To suppress the impact of random atom positions on coherent population transfer.
- To observe dipole-dipole driven Rabi oscillations in a large Rydberg gas.
- To develop a quantum control technique applicable to many-body systems.
Main Methods:
- Utilized quantum control to reduce sensitivity to atom positions.
- Exploited off-resonant Rabi frequency's reduced coupling-strength sensitivity.
- Employed coherent amplification analogous to quasi-phase-matching in nonlinear optics.
Main Results:
- Successfully suppressed the effect of random atom positions.
- Observed dipole-dipole driven Rabi oscillations in a Rydberg gas with hundreds of atoms.
- Experimental results were reproduced by simulations.
Conclusions:
- The developed quantum control technique is effective for many-body systems.
- The method enhances achievable population transfer.
- This technique shows potential for broader applications in quantum control.
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