The conservative system of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si54.gif" display="inline" overflow="scroll"><mml:mi>N</mml:mi></mml:math>atoms coupled with one photon

Sizhuk, Andrii; Ooi, C. H. Raymond

doi:10.1016/j.aop.2015.05.009

Cited by 4 publications

(1 citation statement)

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“…In the used assumptions, the decay of atomic states can be implicitly included in the dynamics of the system. Furthermore, some non-ideality is imposed by the defined averaging procedure (see the discussion, e.g., in [8] and [9]). In other words, the introduction of the concept of measuring the intensity "takes off" the thermodynamic isolation (e.g., the particle conservation) and, generally speaking, requires the consideration of certain dissipative processes.…”

Section: Introductionmentioning

confidence: 99%

Introducing the Generalized Absorptance for a Gas with Bound Atomic States

Sizhuk

Yezhov

2017

Ukr. J. Phys.

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The quantum optical theory of absorption/reemission properties of a system of interacting atoms is discussed. The calculation method of the absorption coefficient is developed with regard for the quantization of field, thermal atomic motion, Doppler effect, and the model interaction between atoms. It is shown that the formulation of the absorption coefficient in the quantum optical context is based on the commutation relation between the operators of electric field and intensity. The revealed non-linear dependence of the absorption coefficient on the atomic density, even in the case of negligible binary interaction, can be referred to a certain kind of quantum-optic collective effects.

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Section: Introductionmentioning

confidence: 99%

Introducing the Generalized Absorptance for a Gas with Bound Atomic States

Sizhuk

Yezhov

2017

Ukr. J. Phys.

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Light absorption by interacting atomic gas in quantum optical regime

Sizhuk

Dorfman

Ooi

2021

The Journal of Chemical Physics

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Quantum optical theory of absorption properties of interacting atoms is developed. The concept of local absorptance is introduced as a derivative of the logarithm of intensity with respect to the distance in the vicinity of a given spatial point and a moment of time. The intensity is represented by the quantum and statistically averaged normal product of creation and annihilation operators of the electromagnetic field. The development of an analytical method of the estimation for the kinetic and optical parameters for the system is proposed here. The calculation method of the absorption coefficient includes thermal atomic motion, Doppler effect, and the short-range interaction between atoms. The absorption coefficient explicitly takes into account the quantum nature of the optical field. The ability of the system to absorb or emit quanta is quantitatively expressed through the special form of interaction integrals. The specific form of integrals results from the structure of the quantum brackets. The interplay between the collective (virtual photon exchange) and binary (optically induced inter-particle bonding) processes determines the system behavior. The spectral profile of the local absorption coefficient for different atomic densities and time intervals is simulated for realistic parameters.

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