Simple atomic systems in resonant laser fields

Ter-Mikhaelyan, Mikhail L.

doi:10.1070/pu1997v040n12abeh000318

Cited by 34 publications

(13 citation statements)

References 129 publications

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“…This line profile represents the dominant term in Im ρ 21 and is separated out in Eq. (7). But in addition the function f (Ω 2 α , Ω 2 β , ∆ α , ∆ β ) in Eq.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Investigation of the electromagnetically induced transparency in the era of cosmological hydrogen recombination

Дубрович

Plunien

2012

J. Phys. B: At. Mol. Opt. Phys.

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Investigation of the cosmic microwave background formation processes is one of the most actual problem at present time. In this paper we analyze the response of the hydrogen atom to the external photon fields. Field characteristics are defined via conditions corresponding to the recombination era of universe. Approximation of three-level atom is used to describe the "atom -fields" interaction. It is found that the phenomena of the electromagnetically induced transparancy (EIT) takes place in this case. Consideration of EIT phenomena makes it necessary to update astrophysical description of the processes of the cosmic microwave background formation and, in particular, Sobolev escape probability. Additional terms to the optical depth entering in the Sobolev escape probability are found to contribute on the level about 1%.

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“…This line profile represents the dominant term in Im ρ 21 and is separated out in Eq. (7). But in addition the function f (Ω 2 α , Ω 2 β , ∆ α , ∆ β ) in Eq.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Investigation of the electromagnetically induced transparency in the era of cosmological hydrogen recombination

Дубрович

Plunien

2012

J. Phys. B: At. Mol. Opt. Phys.

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“…For many physical considerations of light‐matter interaction, it is sufficient to take only two energy eigenstates into account, namely, the states

| 1 ⟩

and

| 2 ⟩

with the energy difference

E_{2} - E_{1}

close to the incident light photon energy

ℏ ω

. The pair states can be two levels in atoms, spin‐split states in the magnetic resonance, tunneling two‐level systems in dielectric glasses, the ground electron and hole quantum‐confined levels in semiconductor quantum dots, etc. In such systems, the saturation of resonant optical properties is controlled by two characteristic times, longitudinal and transverse relaxation times

T_{1}

and

T_{2}

, respectively (

T_{2} \leq 2 T_{1}

).…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Absorption and Photocurrent in Weyl Semimetals

Leppenen

Ivchenko

Golub

2019

Physica Status Solidi (b)

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A theory of light absorption and circular photocurrent in Weyl semimetals is developed for arbitrary large light intensities with account for both the elastic and inelastic relaxation processes of Weyl fermions. The direct optical transition rate is shown to saturate at large intensity, and the saturation behavior depends on the light polarization and on the ratio of the elastic and inelastic relaxation times. The linear‐circular dichroism in absorption is shown to exceed 10% at intermediate light wave amplitudes and fast energy relaxation. At large intensity I, the light absorption coefficient drops as 1/I, and the circular photogalvanic current increases as I.

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“…So, for the efficient transfer of population it is necessary to provide the adiabaticity of interaction of the atom with laser pulses. It is known that the adiabaticity for a single atom can be provided under the following conditions [15,29]:…”

Section: Model and Conditions Of Population Transfer In The Mediummentioning

confidence: 99%

Implementation of all-optical Toffoli gate in Λ-systems

et al. 2012

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AbstractAn optical Toffoli gate is the essential logical element, which permits the implementation of a reversible optical processor. We propose a simple realization of such a gate in films of crystals doped with rare-earth ions. The proposed scheme is based on adiabatic population transfer in a Λ-system by means of counterintuitive and intuitive sequences of short laser pulses. We also discuss possibilities for experimental realization of the proposed gate.

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Simple atomic systems in resonant laser fields

Cited by 34 publications

References 129 publications

Investigation of the electromagnetically induced transparency in the era of cosmological hydrogen recombination

Investigation of the electromagnetically induced transparency in the era of cosmological hydrogen recombination

Nonlinear Absorption and Photocurrent in Weyl Semimetals

Implementation of all-optical Toffoli gate in Λ-systems

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