van der Waals interaction of excited media

Sherkunov, Yury

doi:10.1103/physreva.72.052703

Cited by 39 publications

(66 citation statements)

References 19 publications

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“…To calculate the interaction, we used the method based on the kinetic Green function 24 . We took into account absorption of photons in the medium.…”

Section: Discussionmentioning

confidence: 99%

“…In Section II we consider interaction between two dissimilar atoms embedded in a dielectric medium using the method based on the kinetic Green functions 24 . We took into account absorption of the photons in the medium.…”

Section: U Rmentioning

confidence: 99%

“…To find the energy we will use the method offered in 24 . As we will show, the implementation of this method will result in a finite expression for the energy instead of formula(5).…”

Section: U Rmentioning

confidence: 99%

“…We will calculate the interaction potential of the atoms using the method of kinetic quantum Green's functions 2526 applied to quantum electrodynamics 24 . This method enables us to handle the divergence of the integral (5).…”

Section: Interaction Between Two Atoms In a Dielectric Medium If mentioning

confidence: 99%

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Casimir-Polder interaction between an excited atom and a gas dielectric medium

Sherkunov

2007

Phys. Rev. A

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The Casimir-Polder potential for interaction between an excited atom and a ground state one in the retarded case obtained with the help of perturbation technique drops as 2 R − with the distance between the atoms [E. T. Thirunamachandran, Phys. Rev. A 47, 2539 (1993)]. It results in divergent integrals for interaction between an excited atom and a dilute gas medium. We investigate interaction between two atoms embedded in a dielectric medium with the help of a method, which enables us to make calculations beyond the perturbation technique. We take into account absorption of photons in the medium. This approach solves the problem of divergence.We consider interaction between an excited atom and a planar dielectric gas medium of ground state atoms. We show that the retarded interaction between an excited atom and a gas of groundstate atoms is not oscillating but follows a simple power law. We show that to obtain conventional non-retarded expression for the van der Waals force between an excited atom and a dilute gas, the distance between the atom and the interface should be much smaller than the free mean path of a photon in the medium.Interaction between an excited atom and a hemisphere of ground-state atoms is considered. 34.20.Cf, 34.50.Dy

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“…To calculate the interaction, we used the method based on the kinetic Green function 24 . We took into account absorption of photons in the medium.…”

Section: Discussionmentioning

confidence: 99%

Section: U Rmentioning

confidence: 99%

“…To find the energy we will use the method offered in 24 . As we will show, the implementation of this method will result in a finite expression for the energy instead of formula(5).…”

Section: U Rmentioning

confidence: 99%

Section: Interaction Between Two Atoms In a Dielectric Medium If mentioning

confidence: 99%

See 2 more Smart Citations

Casimir-Polder interaction between an excited atom and a gas dielectric medium

Sherkunov

2007

Phys. Rev. A

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“…For instance, according to such claims, it might be incorrect to calculate the Lifshitz force in excited matter simply from the dielectric function of the excited boundaries [47][48][49][50][51][52][53][54][55]. It is relevant to stress that research into related energy conservation implications of the Casimir effect and quantum vacuum theory is ongoing and it is extremely critical to identify limitations of some idealizations, further potential applications, and paradoxes [36,[45][46].…”

Section: Thermodynamical Considerationsmentioning

confidence: 99%

Modeling the Nonlinear Dynamics of Nanotube Cores Driven by Interlayer Dispersion Force Modulation: New Developments and Future Applications

Pinto

2016

Acta Phys. Pol. A

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Despite several past proposals to employ the inner cores of multiwalled nanotubes as, among others, ultra-highfrequency oscillators, memory devices, and nano-scale sensors, driving into motion a mass initially at rest within the nanotube outer walls has remained a crippling practical obstacle. In addition to the challenge of applying an external driving force upon the entirely embedded shuttle, it has been reported that the dynamics of such motion is "truly nonlinear", that is, it cannot be reduced to that of harmonic or nearly-harmonic oscillators even in the case of vanishing amplitudes. The author has shown that, since friction is nearly negligible, the inner core can be set into motion by breaking the high axial symmetry of the interlayer dispersion forces exerted on it by the outer walls. For instance, by fabricating nanotubes with even just two segments having slightly different dielectric properties, it was concluded that the motion of a partially extruded core under the action of an external electric field could be remarkably stabilized and electrical energy could be both stored into and released from the van der Waals field. Further significant progress was made by identifying a possible mechanism for the time-modulation of the spectral properties of double-walled nanotubes by acting on the free-carrier exciton screening in semiconducting nanotubes. In this paper, new developments are presented in the accurate mathematical modeling of these complex driven systems and additional future applications of telescoping nanotubes as actuators, non-electrochemical energy nanostorage systems, and neutral particle accelerators are illustrated.

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On non‐equilibrium photon distributions in the Casimir effect

Mkrtchian

Henkel

2013

Annalen der Physik

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The electromagnetic field in a typical geometry of the Casimir effect is described in the Schwinger-Keldysh formalism. The main result is the photon distribution function (Keldysh Green function) in any stationary state of the field. A two-plate geometry with a sliding interface in local equilibrium is studied in detail, and full agreement with the results of Rytov fluctuation electrodynamics is found. As an illustration, plots are shown for a spectrum of the energy density between the plates.Comment: 16 pages, 4 figures, added Appendi

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van der Waals interaction of excited media

Cited by 39 publications

References 19 publications

Casimir-Polder interaction between an excited atom and a gas dielectric medium

Casimir-Polder interaction between an excited atom and a gas dielectric medium

Modeling the Nonlinear Dynamics of Nanotube Cores Driven by Interlayer Dispersion Force Modulation: New Developments and Future Applications

On non‐equilibrium photon distributions in the Casimir effect

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