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Single-atom entropy squeezing for two two-level atoms interacting with a single-mode radiation field

Faisal A. A. El-Orany, Mohamed Ridza Wahiddin, A.‐S. F. Obada

arXiv:quant-ph/0703075Optics CommunicationsFeb 19, 200835 citations

Sub-Poissonian photon statistics of light in interaction of two-level atoms in superposed states with a single mode superposed coherent radiation

Rakesh Kumar Rai, Hari Prakash

We study sub-Poissonian photon statistics of light in interaction of a single mode radiation, initially either in a coherent state or in a superposed coherent state with an assembly of two-level atoms using the Hamiltonian, H = ω(a+a + Sz) + g(aS+ + a+ S–) in natural units, where a+ and a are creation and annihilation operators, Sz, S ± are the collective Dicke operators, g is the coupling constant, and ω is the energy of the photons and also the separation between the two atomic levels. We study the cases of (i) a single two-level and (ii) of two two-level atoms interacting with a single mode coherent or superposed coherent radiation. We find that for large coupling time gt, Fano factor shows collapses and revival phenomena, and that the variation is large for small mean number of photons. We also find that in the case of two two-level atoms, photon statistics shows larger sub-Poissonian than the case of a single two-level atom, and that there is no definite relationship between squeezing and sub-Poissonian photon statistics of light.We study sub-Poissonian photon statistics of light in interaction of a single mode radiation, initially either in a coherent state or in a superposed coherent state with an assembly of two-level atoms using the Hamiltonian, H = ω(a+a + Sz) + g(aS+ + a+ S–) in natural units, where a+ and a are creation and annihilation operators, Sz, S ± are the collective Dicke operators, g is the coupling constant, and ω is the energy of the photons and also the separation between the two atomic levels. We study the cases of (i) a single two-level and (ii) of two two-level atoms interacting with a single mode coherent or superposed coherent radiation. We find that for large coupling time gt, Fano factor shows collapses and revival phenomena, and that the variation is large for small mean number of photons. We also find that in the case of two two-level atoms, photon statistics shows larger sub-Poissonian than the case of a single two-level atom, and that there is no definite relationship between squeezing and sub-Poissonian photon statistics of light.

Canadian Journal of PhysicsMar 1, 20106 citations

Atomic coherent trapping in a system of two-level atoms interacting with a single-mode field

Jin-sheng Peng, Gao‐xiang Li

Physics Letters AMay 1, 19931 citation

Simultaneous squeezing of two orthogonal spin components

Hari Prakash, Rakesh Kumar Rai

Squeezing of spin is usually discussed for x and y components ( S x and S y ), considering the commutation relation [ S x , S y ] = i S Z for the triad ( S x , S y , S Z ) of three mutually perpendicular spin components. We generalize and discuss squeezing of the spin component S θ = S x cosθ+ S y sinθ considering all possible such triads, which include S θ . For an explicit example involving the interaction of an assembly of two excited two-level atoms with single-mode coherent radiation, we find that S θ and S θ+π/2 can be squeezed simultaneously.Squeezing of spin is usually discussed for x and y components ( S x and S y ), considering the commutation relation [ S x , S y ] = i S Z for the triad ( S x , S y , S Z ) of three mutually perpendicular spin components. We generalize and discuss squeezing of the spin component S θ = S x cosθ+ S y sinθ considering all possible such triads, which include S θ . For an explicit example involving the interaction of an assembly of two excited two-level atoms with single-mode coherent radiation, we find that S θ and S θ+π/2 can be squeezed simultaneously.

Journal of Optics B Quantum and Semiclassical OpticsNov 23, 200517 citations

Interaction of a two-level atom with squeezed light

Eyob Alebachew, K. Fesseha

arXiv:quant-ph/0610123Optics CommunicationsNov 3, 200614 citations

Radiation Squeezing for M Two-Level Atoms Interacting with a Single Mode Coherent Radiation

Pramila Shukla, Ranjana Prakash

The squeezing of the electromagnetic field for M two level atoms existing in the Dicke state |r, m〉 and interacting with a single mode coherent radiation has been investigated under an approximation based on a fully quantum mechanical approach. The time dependent variance has been calculated and the influence of the number of photons and some other parameters are noted.

Chinese Journal of PhysicsOct 1, 20151 citation

Atomic squeezing in assembly of two two-level atoms interacting with a single mode coherent radiation

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Atomic squeezing in assembly of two two-level atoms interacting with a single mode coherent radiation

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