Progress in quantum electrodynamics theory of highly charged ions

Volotka, A. V.; Glazov, D. A.; Plunien, G.; Shabaev, V. M.

doi:10.1002/andp.201300079

Cited by 66 publications

(59 citation statements)

References 123 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Highly charged ions make an interesting object of study to this end, since the binding situation changes the value of the electron magnetic moment by up to about 20%, which is many orders of magnitude larger than the typical experimental uncertainty. The magnitude of this change roughly scales with the square of the nuclear charge state Z of the ion, hence making measurements at high values of Z potentially interesting.…”

Section: Introductionmentioning

confidence: 99%

Electron Magnetic Moment in Highly Charged Ions: The ARTEMIS Experiment

et al. 2018

View full text Add to dashboard Cite

The magnetic moment (g-factor) of the electron is a fundamental quantity in physics that can be measured with high accuracy by spectroscopy in Penning traps. Its value has been predicted by theory, both for the case of the free (unbound) electron and for the electron bound in a highly charged ion. Precision measurements of the electron magnetic moment yield a stringent test of these predictions and can in turn be used for a determination of fundamental constants such as the fine structure constant or the atomic mass of the electron. For the bound-electron magnetic-moment measurement, two complementary approaches exist, one via the so-called "continuous Stern-Gerlach effect", applied to ions with zero-spin nuclei, and one a spectroscopic approach, applied to ions with nonzero nuclear spin. Here, the latter approach is detailed, and an overview of the experiment and its status is given.

show abstract

Section: Introductionmentioning

confidence: 99%

Electron Magnetic Moment in Highly Charged Ions: The ARTEMIS Experiment

et al. 2018

View full text Add to dashboard Cite

show abstract

“…(6)- (8). Finally, the focusing of the laser is expected to alter also the electron emission spectrum.…”

mentioning

confidence: 99%

Ultrarelativistic Electron States in a General Background Electromagnetic Field

Piazza

2014

Phys. Rev. Lett.

123

View full text Add to dashboard Cite

The feasibility of obtaining exact analytical results in the realm of QED in the presence of a background electromagnetic field is almost exclusively limited to a few tractable cases, where the Dirac equation in the corresponding background field can be solved analytically. This circumstance has restricted, in particular, the theoretical analysis of QED processes in intense laser fields to within the plane-wave approximation even at those high intensities, achievable experimentally only by tightly focusing the laser energy in space. Here, within the Wentzel-Kramers-Brillouin (WKB) or eikonal approximation, we construct analytically single-particle electron states in the presence of a background electromagnetic field of general space-time structure in the realistic assumption that the initial energy of the electron is the largest dynamical energy scale in the problem. The relatively compact expression of these states opens, in particular, the possibility of investigating analytically strong-field QED processes in the presence of spatially focused laser beams, which is of particular relevance in view of the upcoming experimental campaigns in this field. The predictions of QED have been confirmed with outstanding precision in numerous experiments. The impressive agreement between the theoretical and the experimental value of the electron (g−2)-factor is customarily quoted as a prominent example [1]. However, the experimental scrutiny of QED becomes much less thorough when processes are involved, occurring in the presence of a strong background electromagnetic field, i.e. of the order of F cr = m 2 c 3 / |e| = 1.3 × 10 16 V/cm = 4.4 × 10 13 G (here m and e < 0 are the electron mass and charge, respectively) [2]. The main reason is that these values largely exceed the field strengths available in laboratories. An important exception is represented by the electric field of highly-charged ions (charge number Z ∼ 1/α, with α = e 2 / c ≈ 1/137) at the typical QED length λ C = /mc = 3.9 × 10 −11 cm [3,4]. Indeed, numerous experiments on processes occurring in the presence of highly-charged ions [5][6][7][8] have already successfully confirmed the predictions of QED. Correspondingly, advanced analytical methods [9], have been developed to interpret accurate experimental data beyond the exactlysolvable Coulomb model of the ionic field.Modern high-power lasers represent an alternative source of intense electromagnetic fields structurally thoroughly different from atomic fields. Although the amplitude F 0 of the strongest laser pulse ever produced is about 10 −4 F cr [10], it can be boosted to an effective strength F * 0 ∼ F cr in the rest-frame of ultrarelativistic particles colliding with the laser beam [11]. This principle has been exploited at SLAC to perform the so-far unique experimental campaign on strong-laser field QED [12], employing a laser with photon energy 1 eV and amplitude F 0 = 2.7 × 10 10 V/cm, and an almost counter-propagating electron beam with energy of 45 GeV (F * 0 ≈ 0.3 F cr ). The relatively large pul...

show abstract

“…This stimulated significant efforts in calculations of the g factor of Li-like ions [51][52][53][54][55][56] .…”

Section: The G Factor Of Li-like Ionsmentioning

confidence: 99%

Theory of Bound-Electron g Factor in Highly Charged Ions

Shabaev

Glazov

Plunien

et al. 2015

Journal of Physical and Chemical Reference Data

View full text Add to dashboard Cite

The paper presents the current status of the theory of bound-electron g factor in highly charged ions. The calculations of the relativistic, QED, nuclear recoil, nuclear structure, and interelectronic-interaction corrections to the g factor are reviewed. Special attention is paid to tests of QED effects at strong coupling regime and determinations of the fundamental constants. a) Invited paper published as part of the Proceedings of the Fundamental Constants Meeting, Eltville, Germany, February, 1-6, 2015.

show abstract

Progress in quantum electrodynamics theory of highly charged ions

Cited by 66 publications

References 123 publications

Electron Magnetic Moment in Highly Charged Ions: The ARTEMIS Experiment

Electron Magnetic Moment in Highly Charged Ions: The ARTEMIS Experiment

Ultrarelativistic Electron States in a General Background Electromagnetic Field

Theory of Bound-Electron g Factor in Highly Charged Ions

Contact Info

Product

Resources

About