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

Chinese Physics Letters

Adiabatic Passage Based on the Calcium Active Optical Clock

Xiaopeng Xie, Wei Zhuang, Jingbiao Chen

Published Jul 1, 2010• 10 citations
Publisher

Abstract

We propose a new application of the optical adiabatic passage effect for the excitation of a thermal atomic beam, which will be used in the calcium active optical clock to produce population inversion. A comparison between the optical adiabatic passage effect and the Rabi π pulse is investigated, 99% of the calcium atoms in the atomic beam that has a wide velocity distribution will be excited to the upper state for population inversion using the adiabatic passage, while 76% at most will be excited to the excited state using the π pulse with suitable parameters.

DOI
10.1088/0256-307x/27/7/074202

Related papers

Population l 88Sr atomic beam for active optical clock

Xiaobo Xue, Duo Pan, Xiaogang Zhang +2 more

An active optical clock can provide laser light source with potential much narrower linewidth than that of conventional cavity stabilized laser for optical clocks since many cavity noises, including the Brownian thermal noise, can be reduced by orders of magnitude. In this report, a scheme of active optical clock based on Sr atomic beam is proposed. The experimental work of population inversion has been done. A 689 nm laser is used to realize the population inversion between (5s5p)3P1state and (5s2)1S0state by the method of adiabatic rapid passage. A pumping rate of 59% is obtained. In order to establish the population inversion more effectively, an experimental scheme is proposed with a 483 nm pumping laser. A 687 nm laser is used for verification of pumping effectiveness. The atoms left in ground state after 689 nm laser and 687 nm laser pumping is about 7%, which may mainly result from87Sr isotope.

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•May 1, 2014•1 citation

Application of Velocity Grating Spectrum in Calcium-beam Optical Clock

Duo Pan, Haosen Shang, Tianyu Liu +3 more

We apply the velocity grating optical spectrum to the calcium-beam optical clock with Rabi interrogation, in order to take full use of the large amount of atoms with non-zero velocities in the thermal atomic beam. Thus the signal-to-noise ratio and the stability index of calcium optical clock can be improved.

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•Apr 24, 2022•0 citations

Rapid adiabatic passage in quantum dots: Influence of scattering and dephasing

K. Schuh, F. Jahnke, Michael Lorke

Theoretical investigations for the realization of population inversion of semiconductor quantum dot ground-state transitions by means of adiabatic passage with chirped optical pulses are presented. While the inversion due to Rabi oscillations depends sensitively on the resonance condition, the pulse area, as well as on the absence of carrier scattering and dephasing, we find that adiabatic passage is surprisingly insensitive to the excitation conditions and carrier scattering effects. Quantum kinetic models for the interaction of quantum-dot carriers with longitudinal optical phonons are used to describe carrier scattering and dephasing in the corresponding simulations and allow to quantify the conditions to simultaneously invert an ensamble of quantum dots.

Applied Physics Letters•Jul 4, 2011•12 citations

Strong optical forces from adiabatic rapid passage

X. Miao, Esther Wertz, Martin Cohen +1 more

Periodic adiabatic rapid passage from counterpropagating light pulses is used in a parameter domain outside of the conventionally expected successful range to produce large optical forces on atoms by coherent control of the momentum exchange between the light and atoms. Both the magnitude and velocity range are much larger than those of the usual radiative force. We observed the force on metastable He atoms by the deflection of the atomic beam with periodic pulse sequences. We have also been able to map out the force magnitude in the two-dimensional parameter space of peak Rabi frequency and sweep range, and we find qualitative agreement with our model.

Physical Review A•Jan 30, 2007•42 citations

Driving three atoms into a singlet state in an optical cavity via adiabatic passage of a dark state

Mei Lu, Yan Xia, Jie Song +1 more

In this paper, we propose an efficient scheme to drive three atoms in an optical cavity into a singlet state via adiabatic passage. Appropriate Rabi frequencies of the classical fields are selected to realize the present scheme. The scheme is robust against deviations in the pulse delay and laser intensity through some simple analysis of the adiabatic condition. It is notable that the estimated range of the effective adiabaticity condition coincides with the numerical results. When taking dissipation into account, we show that the process is immune to atomic spontaneous emission as the atomic excited states are never populated in adiabatic evolution. Moreover, under certain conditions, the cavity decay can also be efficiently suppressed.

arXiv:1301.0671•Journal of Physics B Atomic Molecular and Optical Physics•Dec 17, 2012•15 citations

Population Inversion in a Single InGaAs Quantum Dot Using the Method of Adiabatic Rapid Passage

Yanwen Wu, I. M. Piper, Matthias Ediger +6 more

Preparation of a specific quantum state is a required step for a variety of proposed quantum applications. We report an experimental demonstration of optical quantum state inversion in a single semiconductor quantum dot using adiabatic rapid passage. This method is insensitive to variation in the optical coupling in contrast with earlier work based on Rabi oscillations. We show that when the pulse power exceeds a threshold for inversion, the final state is independent of power. This provides a new tool for preparing quantum states in semiconductor dots and has a wide range of potential uses.

arXiv:1006.0953•Physical Review Letters•Feb 8, 2011•114 citations
We propose a new application of the optical adiabatic passage effect for the excitation of a thermal atomic beam, which will be used in the calcium active optical clock to produce population inversion. A comparison between the optical adiabatic passage effect and the Rabi π pulse is investigated, 99% of the calcium atoms in the atomic beam that has a wide velocity distribution will be excited to the upper state for population inversion using the adiabatic passage, while 76% at most will be excited to the excited state using the π pulse with suitable parameters.
An active optical clock can provide laser light source with potential much narrower linewidth than that of conventional cavity stabilized laser for optical clocks since many cavity noises, including the Brownian thermal noise, can be reduced by orders of magnitude. In this report, a scheme of active optical clock based on Sr atomic beam is proposed. The experimental work of population inversion has been done. A 689 nm laser is used to realize the population inversion between (5s5p)3P1state and (5s2)1S0state by the method of adiabatic rapid passage. A pumping rate of 59% is obtained. In order to establish the population inversion more effectively, an experimental scheme is proposed with a 483 nm pumping laser. A 687 nm laser is used for verification of pumping effectiveness. The atoms left in ground state after 689 nm laser and 687 nm laser pumping is about 7%, which may mainly result from87Sr isotope.
Theoretical investigations for the realization of population inversion of semiconductor quantum dot ground-state transitions by means of adiabatic passage with chirped optical pulses are presented. While the inversion due to Rabi oscillations depends sensitively on the resonance condition, the pulse area, as well as on the absence of carrier scattering and dephasing, we find that adiabatic passage is surprisingly insensitive to the excitation conditions and carrier scattering effects. Quantum kinetic models for the interaction of quantum-dot carriers with longitudinal optical phonons are used to describe carrier scattering and dephasing in the corresponding simulations and allow to quantify the conditions to simultaneously invert an ensamble of quantum dots.
Periodic adiabatic rapid passage from counterpropagating light pulses is used in a parameter domain outside of the conventionally expected successful range to produce large optical forces on atoms by coherent control of the momentum exchange between the light and atoms. Both the magnitude and velocity range are much larger than those of the usual radiative force. We observed the force on metastable He atoms by the deflection of the atomic beam with periodic pulse sequences. We have also been able to map out the force magnitude in the two-dimensional parameter space of peak Rabi frequency and sweep range, and we find qualitative agreement with our model.
In this paper, we propose an efficient scheme to drive three atoms in an optical cavity into a singlet state via adiabatic passage. Appropriate Rabi frequencies of the classical fields are selected to realize the present scheme. The scheme is robust against deviations in the pulse delay and laser intensity through some simple analysis of the adiabatic condition. It is notable that the estimated range of the effective adiabaticity condition coincides with the numerical results. When taking dissipation into account, we show that the process is immune to atomic spontaneous emission as the atomic excited states are never populated in adiabatic evolution. Moreover, under certain conditions, the cavity decay can also be efficiently suppressed.
Preparation of a specific quantum state is a required step for a variety of proposed quantum applications. We report an experimental demonstration of optical quantum state inversion in a single semiconductor quantum dot using adiabatic rapid passage. This method is insensitive to variation in the optical coupling in contrast with earlier work based on Rabi oscillations. We show that when the pulse power exceeds a threshold for inversion, the final state is independent of power. This provides a new tool for preparing quantum states in semiconductor dots and has a wide range of potential uses.