Efficient photoassociation with a train of asymmetric laser pulses

Zhang, Wei; Wang, Gao‐Ren; Cong, Shu‐Lin

doi:10.1103/physreva.83.045401

Cited by 28 publications

(23 citation statements)

References 35 publications

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“…To obtain the transition factor, the eigenfunctions of bound states {ψ Sl ν } in the grid representation should be precalculated. We calculate the eigenfunctions {ψ Sl ν } using the mapped Fourier grid (MFG) method [23,24].…”

Section: Theoretical Approachmentioning

confidence: 99%

Electric-field modulation of the magnetically induced6Li-40K Feshbach resonance

et al. 2011

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The effect of an external electric field on the magnetically induced 6 Li-40 K Feshbach resonance is investigated theoretically by using the asymptotic bound state model (ABM). An electric field can modify the position and width of the Feshbach resonance to varying extent. However, it hardly changes the background scattering length in the case without open-channel resonance. The width of the s-wave resonance resulting from the p-wave bound state becomes narrow under the action of a strong electric field. The effects of electric field on orbital angular momentum and electronic state of the Feshbach molecule are also discussed.

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Section: Theoretical Approachmentioning

confidence: 99%

Electric-field modulation of the magnetically induced6Li-40K Feshbach resonance

et al. 2011

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“…The first peak is much weaker than the second one due to smaller FC overlapping. For φ = π/3 and π/2, much population induced by off-resonant excitation remains on the vibrational states near dissociation limit due to the slight asymmetry of the envelope of the electric field [20,21]. This part of population also makes a contribution to the final PA efficiency.…”

Section: A Dependence Of Pa Efficiency On Poe At a Fixed T Pmentioning

confidence: 99%

“…Apparently the time scale much shorter than the lifetime of the excited electronic state can overcome the losses caused by spontaneous emission. A frequency-domain cutoff and time-domain asymmetric laser pulses have been implemented to avoid atomic transition [18,19] and to maintain more photoassociated molecules caused by off-resonant excitation [20,21].…”

Section: Introductionmentioning

confidence: 99%

Photoassociation dynamics driven by a modulated two-color laser field

et al. 2011

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Photoassociation (PA) dynamics of ultracold cesium atoms steered by a modulated two-color laser fieldis investigated theoretically by numerically solving the time-dependent Schrödinger equation. The PA dynamics is sensitive to the phase of envelope (POE) φ and the period of the envelope T p , which indicates that it can be controlled by varying POE φ and period T p . Moreover, we introduce the time-and frequency-resolved spectrum to illustrate how the POE φ and the period T p influence the intensity distribution of the modulated laser pulse and hence change the time-dependent population distribution of photoassociated molecules. When the Gaussian envelope contains a few oscillations, the PA efficiency is also dependent on POE φ. The modulated two-color laser field is available in the current experiment based on laser mode-lock technology.

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“…Photoassociation (PA), forming molecules from atoms of the continuum using the laser pulse, has received considerable attention in recent years [1][2][3][4][5][6][7]. Many PA schemes, for the formation of a stable deeply bound state molecule, contain two steps: the first step is a free-to-bound excitation of scattering states of the collision atom pair to a bound vibrational level in an electronically excited molecular state, and the second is a bound-to-bound transition from the excited to the ground electronic state [8].…”

Section: Introductionmentioning

confidence: 99%