Multichannel tunneling in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cs</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi /><mml:mrow><mml:msubsup><mml:mrow><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mi>g</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi></mml:mrow></mml:msubsup></mml:mrow></mml:math>photoassociation spectrum

Vatasescu, Mihaela; Dulieu, Olivier; Amiot, C.; Comparat, D.; Drag, Cyril; Kokoouline, Viatcheslav; Masnou-Seeuws, F.; Pillet, P.

doi:10.1103/physreva.61.044701

Cited by 48 publications

(35 citation statements)

References 8 publications

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“…Staanum et al 19 observed the a 3 ⌺ u + vЉ =4-6 and 32-47 levels by ultracold atommolecule collisions. Vatasescu and co-workers 20,21 identified the vЉ = 5 and 6 vibrational levels of the a 3 ⌺ u + state. Li et al 6 observed the bound vibrational levels of the a 3 ⌺ u + state by resolved fluorescence from the 3 3 ⌺ g + state.…”

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confidence: 99%

Experimental investigation of the Cs2 a Σ3u+ triplet ground state: Multiparameter Morse long range potential analysis and molecular constants

Xie

Sovkov

Lyyra

et al. 2009

The Journal of Chemical Physics

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confidence: 99%

Experimental investigation of the Cs2 a Σ3u+ triplet ground state: Multiparameter Morse long range potential analysis and molecular constants

Xie

Sovkov

Lyyra

et al. 2009

The Journal of Chemical Physics

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“…In this section we analyze the production of entanglement (quantified by the linear entropy L(t)) in the case of a more complex molecular dynamics, related to a theoretical control scheme proposed to create Cs 2 vibrationally cold molecules [37][38][39] using the multichannel tunneling observed in the cesium photoassociation spectrum [40].…”

Section: Entanglement Dynamics In a System Of Three Electronic Stamentioning

confidence: 99%

Entanglement between electronic and vibrational degrees of freedom in a laser-driven molecular system

Vatasescu

2013

Phys. Rev. A

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We investigate the entanglement between electronic and vibrational degrees of freedom produced by a vibronic coupling in a molecular system described in the Born-Oppenheimer approximation.Entanglement in a pure state of the Hilbert space H=H el H vib is quantified using the von Neumann entropy of the reduced density matrix and the reduced linear entropy. Expressions for these entanglement measures are derived for the 2 × N v and 3 × N v cases of the bipartite entanglement, where 2 and 3 are the dimensions of the electronic Hilbert space H el , and N v is the dimension of H vib . We study the entanglement dynamics for two electronic states coupled by a laser pulse (a 2 × N v case), taking as an example a coupling between the a 3 Σ + u (6s, 6s) and 1 g (6s, 6p 3/2 ) states of the Cs 2 molecule. The reduced linear entropy expression obtained for the 3 × N v case is used to follow the entanglement evolution in a scheme proposed for the control of the vibronic dynamics in a Cs 2 cold molecule, implying the a 3 Σ + u (6s, 6s), 0 − g (6s, 6p 3/2 ), and 0 − g (6s, 5d) electronic states, which are coupled by a non-adiabatic radial coupling and a sequence of chirped laser pulses.

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“…For two levels, a tunneling effect is present which has been analyzed from the photoassociation spectrum [40].…”

Section: Theoretical Model a The Photoassociation Reactionmentioning

confidence: 99%

Photoassociation of cold atoms with chirped laser pulses: Time-dependent calculations and analysis of the adiabatic transfer within a two-state model

et al. 2004

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This theoretical paper presents numerical calculations for photoassociation of ultracold cesium atoms with a chirped laser pulse and detailed analysis of the results. In contrast with earlier work, the initial state is represented by a stationary continuum wavefunction. In the chosen example, it is shown that an important population transfer is achieved to ≈ 15 vibrational levels in the vicinity of the v=98 bound level in the external well of the 0 − g (6s + 6p 3/2 ) potential. Such levels lie in the energy range swept by the instantaneous frequency of the pulse, thus defining a "photoassociation window". Levels outside this window may be significantly excited during the pulse, but no population remains there after the pulse. Finally, the population transfer to the last vibrational levels of the ground a 3 Σ + u (6s + 6s) is significant, making stable molecules. The results are interpreted in the framework of a two state model as an adiabatic inversion mechanism, efficient only within the photoassociation window. The large value found for the photoassociation rate suggests promising applications. The present chirp has been designed in view of creating a vibrational wavepacket in the excited state which is focussing at the barrier of the double well potential.

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Multichannel tunneling in theCs20g−photoassociation spectrum

Cited by 48 publications

References 8 publications

Experimental investigation of the Cs2 a Σ3u+ triplet ground state: Multiparameter Morse long range potential analysis and molecular constants

Experimental investigation of the Cs2 a Σ3u+ triplet ground state: Multiparameter Morse long range potential analysis and molecular constants

Entanglement between electronic and vibrational degrees of freedom in a laser-driven molecular system

Photoassociation of cold atoms with chirped laser pulses: Time-dependent calculations and analysis of the adiabatic transfer within a two-state model

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