scholarly journals THE ROLE OF MAGNETOPLASMONS IN CASIMIR FORCE CALCULATIONS

2010 ◽  
Author(s):  
R. ESQUIVEL-SIRVENT ◽  
R. GARCÍA-SERRANO ◽  
M. A. PALOMINO-OVANDO ◽  
G. H. COCOLETZI
Keyword(s):  
Casimir Force

scholarly journals WHY SCREENING EFFECTS DO NOT INFLUENCE THE CASIMIR FORCE

2009 ◽  
Vol 24 (08n09) ◽  
pp. 1721-1742 ◽  
Author(s):  
V. M. MOSTEPANENKO ◽  
R. S. DECCA ◽  
E. FISCHBACH ◽  
B. GEYER ◽  
G. L. KLIMCHITSKAYA ◽  
...  
Keyword(s):  
Casimir Force ◽  
Charge Carriers ◽  
Reflection Coefficients ◽  
Dispersion Forces ◽  
Physical Reason ◽  
Lifshitz Theory ◽  
Third Law Of Thermodynamics ◽  
Applicability Condition ◽  
And Diffusion

The Lifshitz theory of dispersion forces leads to thermodynamic and experimental inconsistencies when the role of drifting charge carriers is included in the model of the dielectric response. Recently modified reflection coefficients were suggested that take into account screening effects and diffusion currents. We demonstrate that this theoretical approach leads to a violation of the third law of thermodynamics (Nernst's heat theorem) for a wide class of materials and is excluded by the data from two recent experiments. The physical reason for its failure is explained by the violation of thermal equilibrium, which is the fundamental applicability condition of the Lifshitz theory, in the presence of drift and diffusion currents.

scholarly journals RADIUS DESTABILIZATION IN FIVE-DIMENSIONAL ORBIFOLDS DUE TO AN ENHANCED CASIMIR EFFECT

2009 ◽  
Vol 24 (19) ◽  
pp. 1495-1506 ◽  
Author(s):  
R. OBOUSY ◽  
G. CLEAVER
Keyword(s):  
Vector Field ◽  
Scalar Field ◽  
Periodic Boundary ◽  
Casimir Force ◽  
Casimir Effect ◽  
Periodic Boundary Conditions ◽  
Casimir Energy ◽  
Higher Dimensional ◽  
The One

One of the challenges in connecting higher dimensional theories to cosmology is stabilization of the moduli fields. We investigate the role of a Lorentz violating vector field in the context of stabilization. Specifically, we compute the one-loop Casimir energy in Randall–Sundrum five-dimensional (non-supersymmetric) S1/ Z2 orbifolds resulting from the interaction of a real scalar field with periodic boundary conditions with a Lorentz violating vector field. We find that the result is an enhanced attractive Casimir force. Hence, for stability, positive contributions to the Casimir force from branes and additional fields would be required to counter the destabilizing, attractive effect of Lorentz violating fields.

scholarly journals Perspective on Some Recent and Future Developments in Casimir Interactions

2020 ◽  
Vol 11 (1) ◽  
pp. 293
Author(s):  
Lilia M. Woods ◽  
Matthias Krüger ◽  
Victor V. Dodonov
Keyword(s):  
Nonlinear Optical ◽  
Casimir Force ◽  
Casimir Effect ◽  
Fundamental Constants ◽  
Dynamical Casimir Effect ◽  
Distance Dependence ◽  
New Directions ◽  
Recent Developments ◽  
Casimir Interactions

Here, we present a critical review of recent developments in Casimir physics motivated by discoveries of novel materials. Specifically, topologically nontrivial properties of the graphene family, Chern and topological insulators, and Weyl semimetals have diverse manifestations in the distance dependence, presence of fundamental constants, magnitude, and sign of the Casimir interaction. Limited studies of the role of nonlinear optical properties in the interaction are also reviewed. We show that, since many new materials have greatly enhanced the nonlinear optical response, new efficient pathways for investigation of the characteristic regimes of the Casimir force need to be explored, which are expected to lead to new discoveries. Recent progress in the dynamical Casimir effect is also reviewed and we argue that nonlinear media can open up new directions in this field as well.

Analysis on the Sticking Failure of Micro-Comb Driving Structure

2013 ◽  
Vol 562-565 ◽  
pp. 1122-1126
Author(s):  
Hai Peng Liu ◽  
Zhen Quan Zhang ◽  
Shi Qiao Gao ◽  
Lei Jin
Keyword(s):  
Steady State ◽  
Applied Voltage ◽  
Casimir Force ◽  
Input Voltage ◽  
Order System ◽  
Mems Devices ◽  
Phase Step ◽  
Driving System ◽  
Mechanical Movement

As an important part of MEMS, the micro-comb electrostatic driving structure is the main source of mechanical movement in many MEMS devices. Its reliability will directly affect the using performance of the MEMS devices. The electrostatic driving system of micro-comb capacitive micro-machined gyroscope can be equivalent to a second order system. If the applied voltage is less than the pull-in voltage, the movable micro-comb will maintain a steady state. Otherwise, the micro-combs will stick together because the applied voltage is greater than the calculated pull-in voltage. If the distance between micro-combs is too narrow, the role of these micro forces will be very significant. The pull-in phenomenon occurring in the process that the micro-machined gyroscope is applied on a phase step input voltage will lead to the very narrow comb spacing. As a result that the role of micro-forces such as the capillary force, Van der Waals force and Casimir force will become very significant, and the micro-combs will stick together permanently.

scholarly journals THE CASIMIR FORCE BETWEEN PLATES WITH SMALL DEVIATIONS FROM PLANE PARALLEL GEOMETRY

1995 ◽  
Vol 10 (18) ◽  
pp. 2661-2681 ◽  
Author(s):  
M. BORDAG ◽  
G.L. KLIMCHITSKAYA ◽  
V.M. MOSTEPANENKO
Keyword(s):  
Large Scale ◽  
Casimir Force ◽  
Green Function Method ◽  
Special Investigation ◽  
Small Deviations ◽  
Plane Parallel ◽  
Parallel Geometry ◽  
The Green Function ◽  
Additive Summation

We present a general calculation of the corrections to the Casimir force between plates with small deviations from plane parallel geometry of the arbitrary type. These corrections are considered up to the fourth order with respect to the relative amplitudes of the deviations. The developed formalism is applied to the cases of nonparallel plates and of large scale as well as short scale deformations of the surfaces of different types. A number of particular examples are explicitly calculated. The method used is the previously developed method of additive summation of the Casimir force potentials with a subsequent renormalization. The results obtained by this method are tested by comparison with the results from the Green function method. A special investigation is performed into the role of mixed terms in the expansion with respect to the deviation amplitudes resulting from different plates. It is shown that such contributions are present already in the first nonvanishing correction to the Casimir force, so that this correction is nonadditive.

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