The photino sector and a confining potential in a supersymmetric Lorentz-symmetry-violating model

We deal with the effects of rotation and violation of the Lorentz symmetry on the scalar field from a geometrical point of view. By choosing a fixed spacelike four-vector and a fixed timelike four-vector, we obtain two modified line elements for the Minkowski space–time. In addition, we consider a uniformly rotating frame. Then, we analyze how the effects of rotation and violation of the Lorentz symmetry determine the upper limit of the radial coordinate. Further, we analyze the effects of rotation and violation of the Lorentz symmetry on the confinement of the scalar field to a hard-wall confining potential.

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A spin-orbit coupling for a neutral particle from Lorentz symmetry breaking effects in the CPT-odd sector of the Standard Model Extension

International Journal of Modern Physics A ◽

10.1142/s0217751x15501365 ◽

2015 ◽

Vol 30 (22) ◽

pp. 1550136 ◽

Cited By ~ 8

Author(s):

H. Belich ◽

K. Bakke

Keyword(s):

Neutral Particle ◽

Lorentz Symmetry ◽

Orbit Coupling ◽

Spin Orbit Coupling ◽

Spin Orbit ◽

Standard Model Extension ◽

Confining Potential ◽

Model Extension ◽

The Standard Model ◽

Lorentz Symmetry Breaking

We start by investigating the arising of a spin-orbit coupling and a Darwin-type term that stem from Lorentz symmetry breaking effects in the CPT-odd sector of the Standard Model Extension. Then, we establish a possible scenario of the violation of the Lorentz symmetry that gives rise to a linear confining potential and an effective electric field in which determines the spin-orbit coupling for a neutral particle analogous to the Rashba coupling [E. I. Rashba, Sov. Phys. Solid State 2, 1109 (1960)]. Finally, we confine the neutral particle to a quantum dot [W.-C. Tan and J. C. Inkson, Semicond. Sci. Technol. 11, 1635 (1996)] and analyze the influence of the linear confining potential and the spin-orbit coupling on the spectrum of energy.

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Lorentz symmetry

Physics Subject Headings (PhySH) ◽

10.29172/e4a7e919778040839f699037a6703d76 ◽

2018 ◽

Keyword(s):

Lorentz Symmetry

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Gauss-Bonnet brane gravity with a confining potential

Physical Review D ◽

10.1103/physrevd.75.064010 ◽

2007 ◽

Vol 75 (6) ◽

Cited By ~ 17

Author(s):

M. Heydari-Fard ◽

H. R. Sepangi

Keyword(s):

Confining Potential ◽

Brane Gravity

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Effective Dielectric Function of Porous Silicon: the Transverse Component

MRS Proceedings ◽

10.1557/proc-358-49 ◽

1994 ◽

Vol 358 ◽

Author(s):

G. Gumbs

Keyword(s):

Absorption Spectrum ◽

Absorption Coefficient ◽

Electron Density ◽

Quantum Wires ◽

Interband Transition ◽

Incident Light ◽

Transverse Component ◽

Effect Of Temperature ◽

High Electron ◽

Confining Potential

ABSTRACTA self-consistent many-body theory is developed to study the effect of temperature and electron density on the interband absorption coefficient and the frequency-dependent refractive index for an array of isolated quantum wires. The peaks in the absorption coefficient correspond to interband transitions resulting in the resonant absorption of light. The oscillations in the derivative spectrum are due to the quantization of the energy levels related to the in-plane confining potential for such reduced dimensional systems. There are appreciable changes in the absorption spectrum when the electron density or temperature is increased. One interband transition peak is suppressed in the high electron density limit and the thermal depopulation effect on the electron subbands can be easily seen when the temperature is high. We also find that the exciton coupling weakens the shoulder features in the absorption spectrum. This study is relevant to optical characterization of the confining potential and the areal density of electrons using photoreflectance. By using incident light with tunable frequencies in the interband excitation regime, contactless photoreflectance measurements may be carried out and the data compared with our calculations. By fitting the numerical results to the peak positions of the photoreflectance spectrum, the number of electrons in each wire may be extracted.

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Black hole superradiance in the presence of Lorentz symmetry violation

Physical Review D ◽

10.1103/physrevd.103.064051 ◽

2021 ◽

Vol 103 (6) ◽

Author(s):

Mohsen Khodadi

Keyword(s):

Black Hole ◽

Lorentz Symmetry ◽

Symmetry Violation

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Shift a laser beam back and forth to exchange heat and work in thermodynamics

Scientific Reports ◽

10.1038/s41598-021-83824-7 ◽

2021 ◽

Vol 11 (1) ◽

Cited By ~ 1

Author(s):

John A. C. Albay ◽

Zhi-Yi Zhou ◽

Cheng-Hung Chang ◽

Yonggun Jun

Keyword(s):

Optical Feedback ◽

Brownian Particle ◽

Time Varying ◽

Optical Technique ◽

Work Related ◽

Engine Efficiency ◽

Confining Potential ◽

Equipartition Theorem ◽

Virtual Temperature ◽

High Flexibility

AbstractAlthough the equivalence of heat and work has been unveiled since Joule’s ingenious experiment in 1845, they rarely originate from the same source in experiments. In this study, we theoretically and experimentally demonstrated how to use a high-precision optical feedback trap to combine the generation of virtual temperature and potential to simultaneously manipulate the heat and work of a small system. This idea was applied to a microscopic Stirling engine consisting of a Brownian particle under a time-varying confining potential and temperature. The experimental results justified the position and the velocity equipartition theorem, confirmed several theoretically predicted energetics, and revealed the engine efficiency as well as its trade-off relation with the output power. The small theory–experiment discrepancy and high flexibility of the swift change of the particle condition highlight the advantage of this optical technique and prove it to be an efficient way for exploring heat and work-related issues in the modern thermodynamics for small systems.

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Aether SUSY breaking: can aether be alternative to F-term SUSY breaking?

Journal of High Energy Physics ◽

10.1007/jhep08(2021)048 ◽

2021 ◽

Vol 2021 (8) ◽

Author(s):

Yusuke Yamada

Keyword(s):

Fluid Model ◽

Realistic Model ◽

Lorentz Symmetry ◽

Susy Breaking ◽

Accelerated Expansion ◽

Condensation Model ◽

Matter Sector

Abstract We investigate supersymmetry (SUSY) breaking scenarios where both SUSY and Lorentz symmetry are broken spontaneously. For concreteness, we propose models in which scalar fluid or vector condensation breaks Lorentz symmetry and accordingly SUSY. Then, we examine whether such scenarios are viable for realistic model buildings. We find, however, that the scalar fluid model suffers from several issues. Then, we extend it to a vector condensation model, which avoids the issues in the scalar fluid case. We show that accelerated expansion and soft SUSY breaking in matter sector can be achieved. In our simple setup, the soft SUSY breaking is constrained to be less than $$ \mathcal{O}(100)\mathrm{TeV} $$ O 100 TeV from the constraints on modification of gravity.

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