scholarly journals Serious limitations of the strong equivalence principle

2017 ◽  
Vol 32 (13) ◽  
pp. 1750068
Author(s):  
De-Chang Dai
Keyword(s):  
Gravitational Radiation ◽  
Equivalence Principle ◽  
Composite Particle ◽  
Critical Radius ◽  
High Energy ◽  
Long Wavelength ◽  
Composite Object ◽  
Neutral Object ◽  
Wavelength Radiation ◽  
Strong Equivalence Principle

It is well known that an accelerated charged particle radiates away energy. However, whether an accelerated neutral composite particle radiates away energy is unclear. We study decoherent Larmor radiation from an accelerated neutral composite object. We find that the neutral object’s long wavelength radiation is highly suppressed because radiation from different charges is canceled out. However, the neutral object radiates high energy or short wavelength radiation without any suppression. In that case, radiation from each particle can be treated independently, and it is called the decoherent radiation. We compare a hydrogen atom’s decoherent Larmor radiation with its gravitational radiation while the atom is in a circular orbit around a star. Gravitational radiation is stronger than the electromagnetic radiation if the orbital radius is larger than some critical radius. Since the decoherent radiation is related to the object’s structure, this implies that the strong equivalence principle which states that gravitational motion does not depend on an object’s constitution has severe limitations.

scholarly journals Formfactors of Relativistic Composite Particle Interactions in Unified Nonlinear Spinorfield Models

1985 ◽  
Vol 40 (7) ◽  
pp. 752-773
Author(s):  
H. Stumpf
Keyword(s):  
Composite Particle ◽  
Particle Interaction ◽  
High Energy ◽  
Field Theories ◽  
Quantum Field Theories ◽  
Statistical Interpretation ◽  
Quantum Field ◽  
Mapping Procedure ◽  
Effective Dynamics ◽  
Rough Approximation

Unified nonlinear spinorfield models are self-regularizing quantum field theories in which all observable (elementary and non-elementary) particles are assumed to be bound states of fermionic preon fields. Due to their large masses the preons themselves are confined and below the threshold of preon production the effective dynamics of the model is only concerned with bound state reactions. In preceding papers a functional energy representation, the statistical interpretation and the dynamical equations were derived and the effective dynamics for preon-antipreon boson states and three preon-fermion states (with corresponding anti-fermions) was studied in the low energy limit. The transformation of the functional energy representation of the spinorfield into composite particle functional operators produced a hierarchy of effective interactions at the composite particle level, the leading terms of which are identical with the functional energy representation of a phenomenological boson-fermion coupling theory. In this paper these calculations are extended into the high energy range. This leads to formfactors for the composite particle interaction terms which are calculated in a rough approximation and which in principle are observable. In addition, the mathematical and physical interpretation of nonlocal quantum field theories and the meaning of the mapping procedure, its relativistic invariance etc. are discussed.

Luminescent Methods for the Visualization of Long Wavelength Radiation

1973 ◽  
pp. 668-674
Author(s):  
S. A. Fridman ◽  
E. Ya. Arapova ◽  
N. V. Mitrofanova ◽  
Yu. P. Timofeev ◽  
V. V. Shchaenko
Keyword(s):  
Long Wavelength ◽  
Wavelength Radiation

Measuring Incoming 'Short' and long' Wavelength Radiation with Directional Thermopile Radiometers

1967 ◽  
Vol 10 (4) ◽  
pp. 0462-0463
Author(s):  
T. E. Bond ◽  
S. R. Morrison ◽  
and C. F. Kelly
Keyword(s):  
Long Wavelength ◽  
Wavelength Radiation

scholarly journals Tidal Tensor and the Emission and Absorption of Gravitational Radiation

1974 ◽  
Vol 64 ◽  
pp. 104-104
Author(s):  
Terrence J. Sejnowski
Keyword(s):  
Gravitational Field ◽  
Gravitational Radiation ◽  
Extended Body ◽  
Local Exchange ◽  
Absorption And Emission ◽  
Long Wavelength ◽  
Normal Coordinates ◽  
Wavelength Limit ◽  
Energy And Momentum ◽  
Image Position

The absorption and emission of gravitational radiation can be calculated in the long wavelength limit by use of the tidal tensor, defined as the gradient of the gravitational pseudoforce, thus where ηb is orthogonal to the 4-velocity ua, and normal coordinates are understood.The exchange of energy and momentum between an extended body and the gravitational field is governed by appropriate integrals of the tidal tensor over space and time.The tidal tensor is the trace Tabdb of the Bel-Robinson tensor Tabcd. In emty space this trace is zero and the tidal tensor vanishes; there is no local exchange of energy.

scholarly journals A cryogenic magneto-optical device for long wavelength radiation

2020 ◽  
Vol 91 (7) ◽  
pp. 075103
Author(s):  
S. J. Rezvani ◽  
D. Di Gioacchino ◽  
S. Tofani ◽  
A. D’Arco ◽  
C. Ligi ◽  
...  
Keyword(s):  
Optical Device ◽  
Long Wavelength ◽  
Wavelength Radiation
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