Signals for Lorentz violation in electrodynamics

Kostelecký, V. Alan; Mewes, Matthew

doi:10.1103/physrevd.66.056005

Cited by 817 publications

(1,166 citation statements)

References 94 publications

Supporting

Mentioning

1,149

Contrasting

Unclassified

Order By: Relevance

“…The components propagate with different group velocities v g± = ∂E ± ∂p ≈ 1 ± 2 ξ Ep p. Assuming that the electric field is originally linearly polarized, then, due to the different group velocities of its circularly polarized components, if the time of propagation of the radiation is sufficiently long, one might have an observably large difference in the time of arrival of the two circularly-polarized components of the field, and the linear polarization would therefore be lost [22]. If instead the time of propagation is not sufficient to produce a detectable difference in the time of arrival of the two modes with different group velocities, the direction of the original linear polarization is rotated (see [27] and references therein). In particular, if the wave propagates for a time T , the amount of rotation is:…”

Section: Effective Field Theory For Planck-scale-modified Electrodynamentioning

confidence: 99%

A constraint on Planck-scale modifications to electrodynamics with CMB polarization data

Gubitosi

Pagano

Amelino‐Camelia

et al. 2009

J. Cosmol. Astropart. Phys.

100

View full text Add to dashboard Cite

Abstract. We show that the Cosmic Microwave Background (CMB) polarization data gathered by the BOOMERanG 2003 flight and WMAP provide an opportunity to investigate in-vacuo birefringence, of a type expected in some quantum pictures of space-time, with a sensitivity that extends even beyond the desired Planck-scale energy. In order to render this constraint more transparent we rely on a well studied phenomenological model of quantumgravity-induced birefringence, in which one easily establishes that effects introduced at the Planck scale would amount to values of a dimensionless parameter, denoted by ξ, with respect to the Planck energy which are roughly of order 1. By combining BOOMERanG and WMAP data we estimate ξ ≃ −0.110 ± 0.076 at the 68% c.l. Moreover, we forecast on the sensitivity to ξ achievable by future CMB polarization experiments (PLANCK, Spider, EPIC), which, in the absence of systematics, will be at the 1-σ confidence of 8.5 × 10 −4 (PLANCK), 6.1 × 10 −3 (Spider), and 1.0 × 10 −5 (EPIC) respectively. The cosmic variance-limited sensitivity from CMB is 6.1 × 10 −6 . † giulia

show abstract

Section: Effective Field Theory For Planck-scale-modified Electrodynamentioning

confidence: 99%

A constraint on Planck-scale modifications to electrodynamics with CMB polarization data

Gubitosi

Pagano

Amelino‐Camelia

et al. 2009

J. Cosmol. Astropart. Phys.

100

View full text Add to dashboard Cite

show abstract

“…But experiment severely limits such deviations. For example, noncovariant corrections to charge-renormalization, an ultraviolet-sensitive quantity, are limited [26] to less than one part in 10 31 . This comprises a staggeringly restrictive constraint.…”

Section: Why Are Violations Of Lorentz Covariance So Small?mentioning

confidence: 99%

Cosmology and the standard model

2003

View full text Add to dashboard Cite

We consider the properties of an ensemble of universes as function of size, where size is defined in terms of the asymptotic value of the Hubble constant (or, equivalently, the value of the cosmological constant). We assume that standard model parameters depend upon size in a manner that we have previously suggested, and provide additional motivation for that choice. Given these assumptions, it follows that universes with different sizes will have different physical properties, and we estimate, very roughly, that only if a universe has a size within a factor √

show abstract

“…The SME permits the identification and direct comparison of essentially all currently feasible experiments searching for Lorentz and CPT violation. In addition, certain limits of the SME correspond to classical kinematics test models of relativity (such as the aforementioned Robertson's framework, its Mansouri-Sexl extension, or the c 2 model) [44]. Another advantage of the SME is the possibility of implementing additional desirable conditions besides coordinate independence.…”

Section: The Standard-model Extensionmentioning

confidence: 99%

“…The SME is a dynamical model constructed to contain all Lorentz-and CPT-violating lagrangian terms consistent with coordinate independence, which is a fundamental requirement to be discussed below. To date, numerous Lorentz-and CPT-violation tests involving hadrons [8][9][10][11][12][13][14][15][16][17][18][19][20][21], protons and neutrons [22][23][24][25][26][27][28][29][30][31], electrons [31][32][33][34][35][36][37][38][39][40][41], photons [42][43][44][45][46][47], muons [48][49][50], and neutrinos [2,[51][52][53][54] have been analysed or identified within th...…”

Section: Motivationmentioning

confidence: 99%

The Lorentz-Violating Extension of the Standard Model

Lehnert

2004

Beyond the Desert 2003

View full text Add to dashboard Cite

Abstract. Quantum-gravity effects are expected to be suppressed by the Planck mass. For experimental progress it is therefore important to identify potential signatures from Planck-scale physics that are amenable to ultrahigh-precision tests. It is argued that minuscule violations of Lorentz and CPT symmetry are candidate signals. In addition, theoretical and experimental aspects of the Standard-Model Extension, which describes the emergent low-energy effects, are discussed. MotivationAn important open question in our understanding of nature at its fundamental level concerns a unified quantum description of all fundamental interactions including gravity. Such a theory is likely to become dominant only as the Planck scale is approached, so that quantum-gravity effects are expected to be minuscule at presently attainable energies. Moreover, the absence of a fully realistic and viable candidate underlying theory provides a major obstacle for the identification of concrete quantum-gravity signatures that can be searched for in present-day or near-future experiments.A possible approach to overcome this phenomenological issue is to determine exact relations in the currently accepted laws of physics that may be violated in prospective fundamental theories and that can be tested with ultrahighprecision. Symmetries typically satisfy these criteria. For example, Lorentz and CPT invariance are cornerstones of our present understanding of nature at the fundamental level, and a variety of Lorentz and CPT tests belong to the most sensitive null experiments available. Lorentz and CPT violation is also a key feature of certain approaches to underlying physics.For example, couplings varying on cosmological scales are one possible source of Lorentz and CPT violation [1]. This fact does not come as a surprise: parameters dependent on spacetime break translational invariance, and translations, rotations, and boosts are linked in the Poincaré group. Thus, violations of translation symmetry can also affect Lorentz invariance. This can be understood intuitively as follows. The equations of motion typically contain the gradient of the coupling, which selects a preferred direction in spacetime leading to apparent Lorentz violation.In this talk, we discuss some theoretical and experimental aspects of the Standard-Model Extension (SME) [2][3][4][5][6][7], which is the low-energy framework for Lorentz-breaking effects. The SME is a dynamical model constructed to contain all Lorentz-and CPT-violating lagrangian terms consistent with coordinate

show abstract

Signals for Lorentz violation in electrodynamics

Cited by 817 publications

References 94 publications

A constraint on Planck-scale modifications to electrodynamics with CMB polarization data

A constraint on Planck-scale modifications to electrodynamics with CMB polarization data

Cosmology and the standard model

The Lorentz-Violating Extension of the Standard Model

Contact Info

Product

Resources

About