scholarly journals Overview of the Phenomenology of Lorentz and CPT Violation in Atomic Systems

Symmetry ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1433 ◽  
Author(s):  
Arnaldo J. Vargas
Keyword(s):  
Lorentz Violation ◽  
Atomic Spectroscopy ◽  
Cpt Violation ◽  
Atomic Systems

This is an overview of recent publications on the prospects of searching for nonminimal Lorentz-violating effects in atomic spectroscopy experiments. The article discusses the differences in the signals for Lorentz violation in the presence of minimal and nonminimal operators and what systems are more sensitive to certain types of Lorentz-violating operators.

Antihydrogen Physics at ALPHA/CERNThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

2009 ◽  
Vol 87 (7) ◽  
pp. 791-797 ◽  
Author(s):  
C. L. Cesar ◽  
G. B. Andresen ◽  
W. Bertsche ◽  
P. D. Bowe ◽  
C. C. Bray ◽  
...  
Keyword(s):  
High Precision ◽  
Quantum Electrodynamics ◽  
Fundamental Constants ◽  
Cpt Violation ◽  
Cpt Symmetry ◽  
Trapped Atoms ◽  
Fundamental Physics ◽  
Atomic Systems ◽  
Unique System ◽  
Recent Developments

Cold antihydrogen has been produced at CERN (Amoretti et al. (Nature, 419, 456 (2002)), Gabrielse et al. (Phys. Rev. Lett. 89, 213401 (2002))), with the aim of performing a high-precision spectroscopic comparison with hydrogen as a test of the CPT symmetry. Hydrogen, a unique system used for the development of quantum mechanics and quantum electrodynamics, has been continuously used to produce high-precision tests of theories and measurements of fundamental constants and can lead to a very sensitive search for CPT violation. After the initial production of cold antihydrogen atoms by the ATHENA group, the ALPHA Collaboration ( http://alpha.web.cern.ch/ ) has set forth on an experiment to trap and perform high-resolution laser spectroscopy on the 1S-2S transition of both atoms. In this contribution, we will review the motivations, goals, techniques, and recent developments towards this fundamental physics test. We present new discussion on predicted lineshapes for the 1S-2S spectroscopy of trapped atoms in a regime not discussed before.

scholarly journals Lorentz and CPT Tests Using Penning Traps

Symmetry ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1220 ◽  
Author(s):  
Yunhua Ding
Keyword(s):  
Quantum Electrodynamics ◽  
Magnetic Moments ◽  
Lorentz Violation ◽  
Experimental Results ◽  
Cpt Violation ◽  
Penning Traps

The theoretical prospects for quantum electrodynamics with Lorentz-violating operators of mass dimensions up to six are revisited in this work. The dominant effects due to Lorentz and CPT violation are studied in measurements of magnetic moments of particles confined in Penning traps. Using recently reported experimental results, new coefficients for Lorentz violation are constrained and existing bounds of various coefficients are improved.

scholarly journals Penning-Trap Searches for Lorentz and CPT Violation

Symmetry ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1703
Author(s):  
Yunhua Ding ◽  
Teague D. Olewiler ◽  
Mohammad Farhan Rawnak
Keyword(s):  
Quantum Electrodynamics ◽  
Recent Progress ◽  
Penning Trap ◽  
Magnetic Moments ◽  
Lorentz Violation ◽  
Cpt Violation ◽  
Penning Traps ◽  
Cpt Symmetry ◽  
Electrons And Positrons ◽  
Mass Ratios

An overview of recent progress on testing Lorentz and CPT symmetry using Penning traps is presented. The theory of quantum electrodynamics with Lorentz-violating operators of mass dimensions up to six is summarized. Dominant shifts in the cyclotron and anomaly frequencies of the confined particles and antiparticles due to Lorentz and CPT violation are derived. Existing results of the comparisons of charge-to-mass ratios and magnetic moments involving protons, antiprotons, electrons, and positrons are used to constrain various coefficients for Lorentz violation.

Lorentz violation and vacuum structure in string theories

2014 ◽  
Vol 30 ◽  
pp. 1460274 ◽  
Author(s):  
Koji Hashimoto
Keyword(s):  
Quantum Gravity ◽  
Lorentz Violation ◽  
Space Time ◽  
Cpt Violation ◽  
Superstring Theory ◽  
Vacuum Structure ◽  
String Theories

We briefly describe what is expected in superstring theory for the Lorentz violation and related CPT violation, for non-experts. Superstring theory is an advanced theory for quantum gravity, but we are still not at a stage of evaluating possible Lorentz violations, although there are proposals for compactification mechanisms of space-time.

scholarly journals Gravity effects on antimatter in the standard-model extension

2014 ◽  
Vol 30 ◽  
pp. 1460273 ◽  
Author(s):  
Jay D. Tasson
Keyword(s):  
Field Theory ◽  
Standard Model ◽  
Lorentz Violation ◽  
Cpt Violation ◽  
Standard Model Extension ◽  
Model Extension ◽  
The Standard Model ◽  
General Field ◽  
Gravity Effects ◽  
Antimatter Gravity

The gravitational Standard-Model Extension (SME) is the general field-theory based framework for the analysis of CPT and Lorentz violation. In this work we summarize the implications of Lorentz and CPT violation for antimatter gravity in the context of the SME. Implications of various attempts to place indirect limits on anomalous antimatter gravity are considered in the context of SME-based models.

Atomic Spectroscopy in the FIM

1986 ◽  
Vol 44 ◽  
pp. 758-761
Author(s):  
J. J. Hren ◽  
S. D. Walck
Keyword(s):  
Electron Microscope ◽  
Electric Fields ◽  
Atom Probe ◽  
Atomic Spectroscopy ◽  
Single Atom ◽  
Statistical Sampling ◽  
Commercial Instrument ◽  
Available Technology ◽  
High Electric Fields ◽  
Field Ion Microscope

The field ion microscope (FIM) has had the ability to routinely image the surface atoms of metals since Mueller perfected it in 1956. Since 1967, the TOF Atom Probe has had single atom sensitivity in conjunction with the FIM. “Why then hasn't the FIM enjoyed the success of the electron microscope?” The answer is closely related to the evolution of FIM/Atom Probe techniques and the available technology. This paper will review this evolution from Mueller's early discoveries, to the development of a viable commercial instrument. It will touch upon some important contributions of individuals and groups, but will not attempt to be all inclusive. Variations in instrumentation that define the class of problems for which the FIM/AP is uniquely suited and those for which it is not will be described. The influence of high electric fields inherent to the technique on the specimens studied will also be discussed. The specimen geometry as it relates to preparation, statistical sampling and compatibility with the TEM will be examined.

Rydberg and the development of atomic spectroscopy (Centennial of J. R. Rydberg's paper on the laws governing atomic spectra)

1990 ◽  
Vol 160 (12) ◽  
pp. 141
Author(s):  
M.A. El'yashevich ◽  
N.G. Kembrovskaya ◽  
L.M. Tomil'chik
Keyword(s):  
Atomic Spectroscopy ◽  
Atomic Spectra
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