Limitations on quantum ladder climbing in complex systems

Vrijen, R. B.; Duncan, D. I.; Noordam, L. D.

doi:10.1103/physreva.56.2205

Cited by 18 publications

(16 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These pulses are efficient to control the ionization and excitation mechanisms when compared with unchirped laser pulses, i.e. transformlimited laser pulses [4][5][6][7][8][9]. The ability to control population transfer from an initial state to a desired final state is of crucial importance as it will open the way to the control of the product yields in chemical reactions.…”

Section: Introductionmentioning

confidence: 99%

Ionization Process of Atoms by Intense Femtosecond Chirped Laser Pulses

Laulan¹,

Haché²,

Ba³

et al. 2013

JMP

View full text Add to dashboard Cite

We numerically investigate the ionization mechanism in a real hydrogen atom under intense fem to second chirped laser pulses. The central carrier frequency of the pulses is chosen to be 6.2 eV (λ = 200 nm), which corresponds to the fourth-harmonic of the Ti:Sapphire laser. Our simulation of the laser-atom interaction consists on numerically solving the three-dimensional time-dependent Schrödinger equation with a spectral method. The unperturbed wave functions and electronic energies of the atomic system were found by using an L 2 discretization technique based on the expansion of the wave functions on B-spline functions. The presented results of kinetic energy spectra of the emitted electrons show the sensitivity of the ionization process to the chirp parameter. Particular attention is paid to the important role of the excited bound states involved in the ionization paths.

show abstract

Section: Introductionmentioning

confidence: 99%

Ionization Process of Atoms by Intense Femtosecond Chirped Laser Pulses

Laulan¹,

Haché²,

Ba³

et al. 2013

JMP

View full text Add to dashboard Cite

show abstract

“…For a given electron angular momentum l and projection m, the solution of Equation (1) can be written as follows: B r is a piecewise polynomial of degree k -1 [20]. We use N b B-spline functions, that are distributed along the radial axis, in a radial box defined from r = 0 to R max .…”

Section: Atomic Structure Calculationsmentioning

confidence: 99%

“…These pulses that are frequency modulated have an advantage over unchirped laser pulses, i.e., transform-limited laser pulses. Their characterization and shaping make them more tailored to achieve complete electronic population inversion in molecular systems [15] and induce resonant multiphoton population transfer in Rydberg atoms [16][17][18][19][20]. It is important to note that the ability to control population transfer from an initial state to a desired final state is of crucial importance as it will open the way to the control of a chemical reaction's end product.…”

Section: Introductionmentioning

confidence: 99%

Control of the Atomic Ionization with Short and Intense Chirped Laser Pulses

Barmaki

Hennani²,

Laulan³

2013

JMP

View full text Add to dashboard Cite

We investigate a two-photon ionization process in a real hydrogen atom by short and intense chirped laser pulses. Our simulation of the laser-atom interaction consists on numerically solving the three-dimensional time-dependent Schrödinger equation with a spectral method. The unperturbed wave functions and electronic energies of the atomic system were found by using an accurate L 2 discretisation technique based on the expansion of the wave functions on B-spline functions. We show the efficiency of chirped laser pulses to control the ionization yield and the transfer of the population to the 2p bound state involved in the ionization path.

show abstract

“…Population transfer via frequency-chirped pulse excitation has been experimentally studied in vibrational excitation of NO in gas phase, where it was shown that population transfer to the v = 3 vibrational level was enhanced by a factor of 10 when chirping the pulse appropriately [19]. In another series of measurements, the role of adiabatic passage was investigated in atomic cesium Rydberg series using chirped ultrafast far-infrared pulses [20].…”

Section: Introductionmentioning

confidence: 99%

Coherent population transfer in four-level ladder systems by single frequency-chirped laser pulse

Zhang

2009

Front. Phys. China

View full text Add to dashboard Cite

Adiabatic passage induced by a frequency-chirped laser pulse in four-level ladder systems is investigated. Two different strategies for efficient population transfer (intuitive and counterintuitive laser pulse) are analyzed. For the larger detuning, the four-level ladder system can be reduced to a two-level system with which we are familiar. For the smaller detuning, the main conditions for realization of population transfer are the following: the width of the transform-limited laser pulse envelope frequency spectrum (without chirp) must be smaller and the peak Rabi frequency of the pulse must be larger than the detuning ε21 and ε21 ∼ ε32 in the case of the three-photon resonance. With this laser pulse, it is possible to achieve complete population via the intermediate levels by three successive adiabatic passages. Complete inversion is also obtained by a counterintuitive direction of the frequency sweep.

show abstract

Limitations on quantum ladder climbing in complex systems

Cited by 18 publications

References 11 publications

Ionization Process of Atoms by Intense Femtosecond Chirped Laser Pulses

Ionization Process of Atoms by Intense Femtosecond Chirped Laser Pulses

Control of the Atomic Ionization with Short and Intense Chirped Laser Pulses

Coherent population transfer in four-level ladder systems by single frequency-chirped laser pulse

Contact Info

Product

Resources

About