Collective effects in a random-site electric dipole system: KTaO3: Li

1983 ◽  
Vol 27 (1) ◽  
pp. 89-101 ◽  
Author(s):  
J. J. van der Klink ◽  
D. Rytz ◽  
F. Borsa ◽  
U. T. Höchli
Keyword(s):  
Electric Dipole ◽  
Collective Effects ◽  
Dipole System ◽  
Random Site

Parametric Effects in a Two‐Level Electric Dipole System

1962 ◽  
Vol 33 (6) ◽  
pp. 2085-2088 ◽  
Author(s):  
J. R. Fontana ◽  
R. H. Pantell ◽  
R. G. Smith
Keyword(s):  
Electric Dipole ◽  
Dipole System ◽  
Parametric Effects

Eigenvalue problem for the relativistic electric-dipole system

1999 ◽  
Vol 60 (5) ◽  
pp. 4140-4143 ◽  
Author(s):  
D. U. Matrasulov ◽  
V. I. Matveev ◽  
M. M. Musakhanov
Keyword(s):  
Eigenvalue Problem ◽  
Electric Dipole ◽  
Dipole System

Dipole glass and ferroelectricity in random-site electric dipole systems

1990 ◽  
Vol 62 (4) ◽  
pp. 993-1026 ◽  
Author(s):  
B. E. Vugmeister ◽  
M. D. Glinchuk
Keyword(s):  
Electric Dipole ◽  
Random Site ◽  
Dipole Glass

Two‐dimensional modeling of a towed in‐line electric dipole‐dipole sea‐floor electromagnetic system: The optimum time delay or frequency for target resolution

Geophysics ◽  
1988 ◽  
Vol 53 (6) ◽  
pp. 846-853 ◽  
Author(s):  
R. N. Edwards
Keyword(s):  
Time Delay ◽  
Half Space ◽  
Electric Dipole ◽  
Late Time ◽  
Crustal Material ◽  
Two Dimensional ◽  
Optimum Time ◽  
Electromagnetic System ◽  
Sea Floor ◽  
Dipole System

Towed in‐line transient electric dipole‐dipole systems are being used to map the electrical conductivity of the sea floor. The characteristic response of a double half‐space model representing conductive seawater and less conductive crustal material to a dipole‐dipole system located at the interface consists of two distinct parts. As time in the transient measurements progresses, two changes in field strength are observed. The first change is caused by the diffusion of the electromagnetic field through the resistive sea floor; the second is caused by diffusion through the seawater. The characteristic times at which the two events occur are measures of sea‐floor and seawater conductivity, respectively. Entirely equivalent responses are observed in a frequency‐domain measurement as frequency is swept from high to low. The simple double half‐space response is modified when the towed array crosses over a conductivity anomaly. I evaluate the magnitude of the anomalous response as a function of delay time and frequency using a two‐dimensional theory and a vertical, plate‐like target. If the ratio of the conductivity of the seawater to that of the sea floor is greater than unity, then an optimum time delay or frequency can be found which maximizes the response. For large conductivity contrasts, the optimum response is greater than the response at late time or zero frequency by a factor of the order of the conductivity ratio.

On the electromagnetic response of a resistive cylinder buried in a conductive host

Geophysics ◽  
2014 ◽  
Vol 79 (6) ◽  
pp. E341-E351 ◽  
Author(s):  
Andrei Swidinsky
Keyword(s):  
Electric Dipole ◽  
Mineral Exploration ◽  
Skin Depth ◽  
Hydrocarbon Exploration ◽  
Electromagnetic Response ◽  
Dipole Source ◽  
Additional Information ◽  
Dipole System ◽  
Single Dipole ◽  
Current Systems

The frequency-domain electromagnetic response of a confined conductor buried in a resistive host has received much attention, particularly in the context of mineral exploration. In contrast, the problem of the electromagnetic response of a confined resistor buried in a conductive host has been less thoroughly studied. However, resistive targets are important in geotechnical and hydrologic studies, archaeological prospecting, and, more recently, offshore hydrocarbon exploration. I analytically address the problem of the electromagnetic response of a completely resistive cylindrical cavity buried in a conductive host in the presence of a simplified 2D electric dipole source. In contrast to the confined conductor, which channels and induces current systems, the confined resistor deflects current and produces additional eddy current systems in the conductive host. I apply this theory to model the response of a grounded electric dipole-dipole system operating over a range of frequencies from 0 Hz to 10 kHz, in the presence of a horizontal 5-m radius insulating cylinder located 1-m beneath the surface of a uniform earth. This represents a common hazard encountered during mining and civil engineering operations. Results show that such an insulating cavity increases the recorded electric field amplitude and phase delay at all transmitted frequencies. These observations suggest that a broadband electromagnetic prospecting system may provide additional information about the location and extent of a void, over and above a standard dipole-dipole resistivity survey. When the host skin depth is much larger than all other length scales, the response can be approximated by an equivalent single dipole unless the cylinder’s radius is much larger than its distance from the transmitter. This result provids a useful rule of thumb to determine the acceptable range over which a resistive target can be modeled by a distribution of dipoles.

scholarly journals Interaction and Entanglement of a Pair of Quantum Emitters near a Nanoparticle: Analysis beyond Electric-Dipole Approximation

Entropy ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 135 ◽  
Author(s):  
Miriam Kosik ◽  
Karolina Słowik
Keyword(s):  
Electric Dipole ◽  
Dipole Approximation ◽  
Higher Order ◽  
Collective Effects ◽  
Quantization Scheme ◽  
Multipole Interaction ◽  
Plasmonic Nanoparticle ◽  
Collective Response ◽  
Markovian Limit ◽  
Quantum Emitters

In this paper, we study the collective effects which appear as a pair of quantum emitters is positioned in close vicinity to a plasmonic nanoparticle. These effects include multipole–multipole interaction and collective decay, the strengths and rates of which are modified by the presence of the nanoparticle. As a result, entanglement is generated between the quantum emitters, which survives in the stationary state. To evaluate these effects, we exploit the Green’s tensor-based quantization scheme in the Markovian limit, taking into account the corrections from light–matter coupling channels higher than the electric dipole. We find these higher-order channels to significantly influence the collective rates and degree of entanglement, and in particular, to qualitatively influence their spatial profiles. Our findings indicate that, apart from quantitatively modifying the results, the higher-order interaction channels may introduce asymmetry into the spatial distribution of the collective response.

Sign in / Sign up

Export Citation Format

Share Document