TWO-LEVEL ATOM UNDERGOING TWO PHOTON TRANSITION IN A QUANTIZED FIELD: THE FLUORESCENT SPECTRUM

1992 ◽  
Vol 06 (12) ◽  
pp. 729-736
Author(s):  
AMITABH JOSHI ◽  
S. V. LAWANDE
Keyword(s):  
Fluorescence Spectrum ◽  
Two Photon ◽  
Photon Transition ◽  
Dressed States ◽  
Level Atom ◽  
Coherent Field ◽  
Fluorescent Spectrum ◽  
Qualitative Nature ◽  
Quantized Field ◽  
The Mean

The fluorescence spectrum produced by a two-photon Jaynes-Cummings model (JCM) has been analyzed using the infinity of transitions among the dressed states of its Hamiltonian. A large number of resonances in the spectra are observed which are sensitive to the mean photon numbers of the quantized coherent field. Also, the qualitative nature of these spectra are in contrast to that of the corresponding spectra of standard JCM.

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

1983 ◽  
Vol 61 (1) ◽  
pp. 15-29 ◽  
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.

ENTANGLEMENT FOR JAYNES CUMMINGS MODEL IN THE PRESENCE MULTI-PHOTON PROCESS UNDER DECOHERENCE EFFECT

2013 ◽  
Vol 11 (03) ◽  
pp. 1350026 ◽  
Author(s):  
S. ABDEL-KHALEK ◽  
M. S. ALMALKI
Keyword(s):  
Quantum Computer ◽  
Single Mode ◽  
Entanglement Dynamics ◽  
Nonlocal Correlation ◽  
Phase Damping ◽  
Level Atom ◽  
Coherent Field ◽  
Photon Process ◽  
Quantized Field ◽  
Decoherence Effect

The quantum nonlocal correlation between an atom and coherent field is described quantitatively in terms of multi-photon and phase damping processes. Especially, considering a two-level atom interacts with a single-mode quantized field in a coherent state inside a phase-damped cavity, and taking into account the number of multi-photon transitions and phase damping effect, the entanglement is investigated during the time evolution as a function of involved' parameters in the system. The results show that the enhancement of the transitions are very useful in generating a high amount of entanglement. Due to the significance of how a system is quantum correlated with its environment in the construction of a scalable quantum computer, the entanglement dynamics between the bipartite system with its environment is evaluated and investigated during the dissipative process. Finally, the physical interpretation of the correlation behaviors between the subsystems is explained through the statistical properties of the field.

scholarly journals NON-DEGENERATE TWO-PHOTON FLUORESCENCE SPECTRUM FOR TWO-LEVEL ATOM IN SQUEEZED VACUUM

1998 ◽  
Vol 47 (2) ◽  
pp. 219
Author(s):  
HE LIN-SHENG ◽  
FENG XUN-LI ◽  
WU SHI-XIONG ◽  
ZHANG ZHI-MING ◽  
XIA YU-XING
Keyword(s):  
Fluorescence Spectrum ◽  
Two Photon ◽  
Squeezed Vacuum ◽  
Level Atom ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence

ON THE CHARACTERISTICS OF FLUORESCENCE SPECTRUM OF A TWO-LEVEL ATOM INTERACTING WITH AN EVEN COHERENT STATE

1994 ◽  
Vol 08 (27) ◽  
pp. 1719-1728
Author(s):  
AMITABH JOSHI
Keyword(s):  
Coherent State ◽  
Fluorescence Spectrum ◽  
Interference Effect ◽  
Annihilation Operator ◽  
Spectral Features ◽  
Cavity Field ◽  
Two Photon ◽  
Level Atom ◽  
Photon Annihilation

The fluorescence spectrum of a two-level atom interacting with a quantized cavity field in an even coherent state, an eigenstate of two-photon annihilation operator, is investigated and compared with the spectral features obtained in an ordinary coherent state. Differences in the quality of these spectra are attributed to the interference effect present in the even coherent state.

scholarly journals A Treatment of the Absorption Spectrum for a Multiphoton -Type Three-Level Atom Interacting with a Squeezed Coherent Field in the Presence of Nonlinearities

2011 ◽  
Vol 2011 ◽  
pp. 1-11
Author(s):  
F. K. Faramawy
Keyword(s):  
Absorption Spectrum ◽  
Photon Number ◽  
Single Mode ◽  
Field Coupling ◽  
Multiphoton Transition ◽  
Mode Field ◽  
Dressed States ◽  
Level Atom ◽  
Coherent Field ◽  
Intensity Dependent Coupling

We study the interaction of a three-level atom with a single mode field through multiphoton transition in a cavity, taking explicitly into account the existence of forms of nonlinearities of both the field and the intensity-dependent atom-field coupling. The analytical forms of the absorption spectrum is calculated using the dressed states of the system. The effects of photon multiplicities, mean photon number, detuning, Kerr-like medium, and the intensity-dependent coupling functional on the absorption spectrum are analyzed.

NUMBER-PHASE WIGNER FUNCTION FOR THE FIELD STATE OF A TWO-PHOTON JAYNES–CUMMINGS MODEL

1999 ◽  
Vol 13 (05) ◽  
pp. 143-152 ◽  
Author(s):  
AMITABH JOSHI ◽  
HO TRUNG DUNG
Keyword(s):  
Wigner Function ◽  
Photon Number ◽  
Single Mode ◽  
Two Photon ◽  
Photon Transition ◽  
Mode Field ◽  
Level Atom ◽  
Field State

The number-phase Wigner function W NP (defined in Refs. 3 and 4) has been studied for the field state of a two-level atom undergoing two-photon transition in a single mode field sustained in an ideal cavity. The photon number and the phase observables are graphically represented by this function W NP and thus their complementarity can be directly studied at any time for any initial atomic as well as field state.

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