Quantum computer based on activated dielectric nanoparticles selectively interacting with short optical pulses

Gadomskiǐ, O. N.; Kharitonov, Yu. Ya.

doi:10.1070/qe2004v034n03abeh002622

Cited by 13 publications

(13 citation statements)

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“…At the same time, relativistic operator B (±) 1l given by (31) constructed here describes the retarded interaction of two quasimolecular electrons uniformly and equally in both the domains Ω c and Ω d of close and distant electron correlations and can therefore be used to solve many twoelectron problems in atomic and molecular spectroscopy, astrophysics, the theory of slow atomic collisions, etc. Moreover, the relativistic operator of two-electron interaction (31) can be used for mathematical modeling of atomic clusters [34], for investigating the optical properties of various nanostructure systems in intense optical fields [35], [36], and also for solving several important problems of recording, reading, and transferring quantum information from one two-level atom (qubit) to another [37], [38].…”

Section: Resultsmentioning

confidence: 99%

The relativistic operator of interaction of two quasimolecular electrons as a third-order effect of quantum electrodynamics

2010

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We solve the problem of interaction two quasimolecular electrons located at an arbitrary separation near different atoms (nuclei). We consider third-order effects in quantum electrodynamics, which include the virtual photon exchange between electrons with emission (absorption) of a real photon. We obtain the general expression for matrix elements of the operator of the effective interaction energy of two quasimolecular electrons with the external radiation field, which allows calculating probabilities of inelastic processes with rearrangement at slow collisions of multicharge ions with relativistic atoms. We demonstrate that consistently taking the natural condition of the interaction symmetry with respect to the two electrons into account results in the appearance of additional terms in the operators of spin-orbit, spin-spin, and retarded interactions compared with the previously obtained expressions for these operators. We construct the operator of the dipole-dipole interaction of two neutral atoms located at an arbitrary separation.

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Section: Resultsmentioning

confidence: 99%

The relativistic operator of interaction of two quasimolecular electrons as a third-order effect of quantum electrodynamics

2010

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“…This method was tested in [14,15,17,20] by solving various boundary optics problems. According to this method, the electric field strength ( , ) t E r for the examined system at arbitrary observation point r at the moment of time t is expressed as follows: (n is the number of particles in the system), j ′ r is the coordinate over which integration is carried out, j p are the quantum-mechanical averages of the induced dipole moments of the two-level impurity atoms: (2) and the quantities j X obey the equations for the coupled quantum dipoles [2,14]:…”

Section: Electric Field Equationsmentioning

confidence: 99%

“…They affect a number of processes, for example, giant Raman light scattering by molecules adsorbed on the nanoparticle surface [10], light scattering by colloid gold [9,11] (whose properties are determined by resonance at a wavelength of ~550 nm observed for spherical nanoparticles), absorption and scattering of optical radiation by sodium vapor with allowance for the microdrop component, etc. A description of the properties of these structures is mostly based on the Mie theory [9,12,13] or integral equations [2,14,15]. There are approaches that study the optical properties of nonspherical particles [4].…”

Section: Introductionmentioning

confidence: 99%

Electrodynamic response of a colloid ensemble with allowance for the influence of distant nanoparticles

Shalin

2006

Russ Phys J

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A. S. ShalinUDC 537.876The optical properties of a colloid consisting of nanoparticles are investigated on the example of interaction of three dielectric particles consisting of nonresonant atoms (whose natural transition frequencies are far from the radiation frequency) with interstitial barium atoms in the field of external optical radiation. On the basis of integrodifferential equations, expressions for the electric and magnetic fields in the wave zone are derived. The influence of distant neighbors in the ensemble on the light-scattering properties of a nanoparticle is considered, and the condition of applicability of the frequently used two-particle approximation is obtained. The spectrum of the system is investigated, and an additional resonant peak at the natural frequency of the isolated particle caused by the distant neighbor is established. Under some specific conditions, the additional peak intensity may exceed the main peak intensity of the optical near-field resonance in the two-particle system.

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“…Taking into account the interaction of the nanospheres and also their angular distribution leads to the appearance of a dependence of the spectrum on the location of the structural elements. As shown in [16,17], a change in the distance between the centers of the interacting spheres in a two-particle system leads to a shift of the size-dependent optical resonance along the frequency scale. As can be also seen in Fig.…”

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confidence: 96%

“…plicated form [13,[16][17][18]. In the case under consideration, for some colloid made up of dielectric (glass) nanoparticles activated by impurity atoms, we can write the simplified expression [16,17]:…”

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confidence: 99%

Light scattering by nanosized systems with different spatial organizations

Shalin

2006

J Appl Spectrosc

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The integrodifferential equation method is used to study the spectrum of a nanoparticle colloid for the example of interaction of three arbitrarily arranged dielectric particles made up of nonresonant atoms (the eigenfrequency of the transition is far from the emission frequency) with incorporated barium atoms in an external optical radiation field. The effect on the light-scattering properties of a nanosphere in the ensemble of its distant "neighbors" is studied; an additional peak associated with them is observed as a frequency close to the resonance for an isolated nanosphere, which under certain conditions has higher intensity than the main peak corresponding to optical near-field resonance in a two-particle system. The dependence of the spectrum of the nanosized system on the geometric structure is studied, and it is shown that very precise tuning of the resonance frequency is possible by varying the angular distribution of the particles.Introduction. In many optical problems connected with emission by microsized and nanosized structures, the problem arises of studying their scattering spectrum, and also identifying the resonance frequencies corresponding to the considered system. In [1], such a problem was solved for the case of metastructural coatings composed of dimers of alkali metals. In [2, 3], clusters were studied that included several tens of interacting atoms. Considerable attention has also been paid to application of such structures in medicine [4-7] (DNA-bound nanoparticles, biomarkers). For this purpose, mainly spherical nanoparticles on the order of 10-30 nm in size have been used, the optical properties of which [8,9] are determined by resonance at the wavelength ≈550 nm. Papers are available that study the light-scattering characteristics of particles of arbitrary shape [10].A large number of papers have also been devoted to study of the interaction between nanoparticles in systems of two or more components. Thus the papers [11,12] study the interaction of a metallic nanosphere with the smooth surface of a semi-infinite medium, which is of significant interest, for example, for optical near-field microscopy. The papers [13,14] study the interaction of a spherical nanoparticle with the surface of an optical medium when island films are present on the surface. This has made it possible to satisfactorily explain the spectral properties of objects observed in [15].We should note that in practically all the indicated papers, the studied structures were considered in the nearest "neighbor" approximation, i.e., neglecting the effect of more distant particles (considering that effect as negligibly small compared with the effect of the surrounding environment). Nevertheless, under certain conditions, we cannot neglect the distant "neighbors", and taking them into account leads to the appearance of additional peaks in the spectrum of the interacting nanoparticles.In this paper, a successive solution of the boundary-value problem of optics for light scattering from some colloid is proposed, taking into...

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Quantum computer based on activated dielectric nanoparticles selectively interacting with short optical pulses

Cited by 13 publications

References 0 publications

The relativistic operator of interaction of two quasimolecular electrons as a third-order effect of quantum electrodynamics

The relativistic operator of interaction of two quasimolecular electrons as a third-order effect of quantum electrodynamics

Electrodynamic response of a colloid ensemble with allowance for the influence of distant nanoparticles

Light scattering by nanosized systems with different spatial organizations

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