Pseudo information entropy of a three-level atom interaction with two-laser fields in Λ-configuration

We have investigated the interaction of two level atom with time varying quadrature squeezed light field. Jaynes-Cummings model is used for solving the atom radiation interaction. Time evolution of the system for different squeezing parameter and phase have been studied. There are no well-defined revivals in population inversion when the squeezed phase is π and the squeezing parameter is greater than 0.5. Using a time varying frequency for the light field, it is found that the randomness of the population inversion and the collapse revival phenomena can be controlled. Frequency modulation of the field can thus be used as a tool for manipulating the squeezed light atom interaction.

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Resonance fluorescence spectra from a three level atom interacting with a strong bichromatic field: induced two photon transitions

Canadian Journal of Physics ◽

10.1139/p83-003 ◽

1983 ◽

Vol 61 (1) ◽

pp. 15-29 ◽

Cited By ~ 2

Author(s):

Douglas A. Hutchinson ◽

Christine Downie ◽

Constantine Mavroyannis

Keyword(s):

Ground State ◽

Rabi Frequency ◽

Resonance Fluorescence ◽

Excitation Spectra ◽

Laser Fields ◽

Two Photon ◽

Photon Transition ◽

Level Atom ◽

Photon Excitation ◽

The One

This investigation describes the interaction of a three level atom with two laser fields. One of the transitions from the ground state is in resonance with twice the frequency of the first laser and the other transition from the ground state is in resonance with the second laser. The Green's function formalism is used to derive expressions from which the induced two photon and one photon excitation spectra are computed. Also, approximate expressions are derived for the excitation spectra in the appropriate frequency regions. These results agree well with the numerical computations based upon the precise expressions. The interference between the two transitions produce some splittings; these splittings depend upon the Rabi frequency of the one photon transition. The intensities of the weak peaks depend upon the ratio of the Rabi frequency of the two photon transition to the frequency of the first laser. Some features of the excitation spectra are interpreted in terms of previous knowledge about the behavior of two level atoms in strong laser fields.

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Three-level atom interferometer with bichromatic laser fields

Physical Review A ◽

10.1103/physreva.68.043621 ◽

2003 ◽

Vol 68 (4) ◽

Cited By ~ 4

Author(s):

Kazuhito Honda ◽

Shinya Yanagimachi ◽

Atsuo Morinaga

Keyword(s):

Atom Interferometer ◽

Laser Fields ◽

Level Atom

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A laser-excited three-level atom. II numerical results

Canadian Journal of Physics ◽

10.1139/p90-065 ◽

1990 ◽

Vol 68 (4-5) ◽

pp. 411-421 ◽

Cited By ~ 4

Author(s):

Constantine Mavroyannis

Keyword(s):

Excited State ◽

Laser Field ◽

Spectral Width ◽

Spectral Functions ◽

Laser Fields ◽

Atomic Transitions ◽

Level Atom ◽

Short Lifetime ◽

Strong Transition ◽

Long Lifetime

Numerical calculations are presented for the interference spectra of a laser-excited three-level atom, where the strong and the weak atomic transitions are driven by resonant and nonresonant laser fields, respectively. The spectral functions describing the interference spectra for the electric dipole allowed excited state have been considered in the low- and high-intensity limit of the laser field operating in the strong transition. The interference spectra arise from the competition between short-lifetime spontaneous processes and short- and long-lifetime excitations induced by the strong and the weak laser fields, respectively. Both laser fields have been treated as quantized and as classical entities. The computed spectra have been presented graphically for different values of the Rabi frequencies and detunings of the weak laser field. It is shown that the decrease in the intensity of the short-lifetime excitation may provide a measure of the spectral width of the long-lifetime excitation.

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