Effect of the dynamic Stark shift on dipole squeezing in two-photon processes

We have studied the squeezing properties of the atom and the radiation field in arbitrary intensity-dependent-coupling Jaynes-Cummings model when it is restricted to the following initial condition: the atom in its coherent state and the field in the vacuum state. The influence of virtual-photon processes on the atomic squeezing predicted by the Jaynes-Cummings model (JCM) has been examined. The relationship between the field and atomic squeezing in the resonant multi-photon JCM has been discussed. The symmetry between the field and atomic squeezing (SFAS) has been exposed in the resonant vacuum one-photon JCM, and the influence of non-resonant interaction and virtual-photon processes on the SFAS has also been discussed.PACS 42.50.Dv-Nonclassical photon states (including antibunched, squeezed, sub-Poissonian). PACS 42.50.Lc -Quantum fluctuations, quantum noise, and quantum jumps. PACS 42.50.Hz -Strong-field excitation of optical transitions in quantum systems; multi-photon processes; dynamic Stark shift. PACS 05.45 -Theory and models of chaotic systems.

show abstract

“…In order to investigate the squeezing properties of the atom, we consider two slowly varying Hermitian conjugate operators [8] (36)…”

Section: -The Squeezing Properties Of the Atommentioning

confidence: 99%

“…It has been theoretically shown that the squeezed field can be generated by various physical processes [5]. Meanwhile, the squeezing of the fluctuations of the atomic dipole variables has also received considerable interest [8]. Meanwhile, the squeezing of the fluctuations of the atomic dipole variables has also received considerable interest [8].…”

mentioning

confidence: 99%

The squeezing properties in the Jaynes-Cummings model with arbitrary intensity-dependent coupling

Xie

Rao²,

Liu

et al. 1996

Il Nuovo Cimento D

View full text Add to dashboard Cite

show abstract

“…The ESS on atomic-dipole squeezing in two-photon for an atom started the interaction from a superposition coherent states has been studied [13]. Also, the influence of this shift on the amount of the correlation between the quantum system has been investigated in the two-photon [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of stark shift on three-level atom interacting with a correlated two-mode of non-linear coherent state

et al. 2022

View full text Add to dashboard Cite

In this manuscript, we study a new non-linear system which represents a ?-type five level atom interacting with a quantized four-mode electromagnetic field. A non-linear Stark shift is introduced, through the elimination of intermediate levels (two and four) using the adiabatic elimination technique. By using the Schrodinger equation we obtain the analytic solution this model. Some statistical aspects through the effective Hamiltonian are presented such as the collapses-revivals phenomenon, degree of purity, concurrence, and the squeezing phenomenon with respect to study the effect of Stark shift parameters on these statistical aspects. For small values of the Stark shift parameter, the collapse times increase and the atomic inversion symmetry axis shifts upward, while the entanglement decreases significantly. It has been noted that the system is affected by the Stark shift parameter.

show abstract

“…In particular, the effects of QI become much more profound for large focusing angles; for example, for certain ⌽ in Figs. 3 and 4 it leads to complete suppression of the two-excited-state population 22 . To elaborate more on this point, assuming complete coverage of the atoms by the squeezing ͑i.e., ϭ ͒ it can be shown from Eqs.…”

Section: Squeezing Over a Large Solid Anglementioning

confidence: 99%

“…͑55͒ and ͑56͒ must be retained for the solution to be accurate. Figures 2-4 show graphs of the full solution for the excited-state populations 22 and 33 as a function of the focusing angle and of the quantum interference phase ⌽. Clearly, along the ⌽ axis we observe the 2 -periodic structure ͑ periodic in the phase o of the RO͒ of the atomic populations, a direct consequence of quantum interference, while along the dimension we see increasingly interesting features that appear as the solid angle of coverage is increased.…”

Section: Squeezing Over a Large Solid Anglementioning

confidence: 99%

Quantum interference in two-photon excitation with squeezed and coherent fields

1999

View full text Add to dashboard Cite

Two-photon excitation of a three-level atom in a ladder configuration (1→2→3) by simultaneous illumination with fields in squeezed vacuum and coherent states results in quantum interference for the excitation process. The particular configuration considered here is one for which the signal and idler output fields of a subthreshold nondegenerate optical parametric oscillator are in resonance with the two-stepwise dipole atomic transitions (1→2,2→3), while a ''reference oscillator'' field is in two-photon resonance with the quadrupole transition (1→3). In an extension of the work of Ficek and Drummond ͓Phys. Rev. A 43, 6247 ͑1991͔͒, a theoretical formulation based on the full quantum master equation for the problem is presented. The combined effects of quantum interference and the nonclassical character of the squeezed state are investigated, and offer the potential for a new detection strategy for quantum fluctuations of the electromagnetic field with ultrahigh frequencies ͑10's-100's THz͒. Based on the theory developed, we analyze quantum interference in excitation in several special cases relevant to experimental realizations, including the effects of a small focusing angle of the squeezing onto the atoms, and unusual population inversions. Special emphasis is given to identifying intrinsically quantum optical field effects versus classical field effects. Procedures that could distinguish between the two ͑i.e., classical and nonclassical͒ are suggested. ͓S1050-2947͑98͒06109-5͔

show abstract

Effect of the dynamic Stark shift on dipole squeezing in two-photon processes

Cited by 17 publications

References 38 publications

The squeezing properties in the Jaynes-Cummings model with arbitrary intensity-dependent coupling

The squeezing properties in the Jaynes-Cummings model with arbitrary intensity-dependent coupling

Effect of stark shift on three-level atom interacting with a correlated two-mode of non-linear coherent state

Quantum interference in two-photon excitation with squeezed and coherent fields

Contact Info

Product

Resources

About