Search arXiv⌕ Search
Home/Archive/arXiv

arXiv · 2609.25099

The use of coherent states in the excitation and ionization of atoms by a short symmetric pulse

Jorge E. Miraglia
View original source ↗Read source document ↗Export metadata ↓

Abstract

We propose a new model for describing the excitation of atoms by short symmetric pulses. The theory is based on the impulse approximation and incorporates a confining potential approximated by a harmonic oscillator. Results are presented for a wide variety of parameters, including field intensity and laser frequency. Permitted and forbidden transitions are analyzed in detail. The photon energy spectrum presents peaks attributed to multiphoton absorption. Our model demonstrates robustness and reliability, paving the way for addressing more complex scenarios.

Explore related subjects

physics.atom-ph

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Jorge E. Miraglia. 2026-09-19. The use of coherent states in the excitation and ionization of atoms by a short symmetric pulse. https://arxiv.org/abs/2609.25099

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

Accurate ab initio calculations of the ground state properties of singly charged alkali metal hydrides

In this article, we investigate the ground state electronic properties of singly charged alkali metal hydrides using the single-reference coupled-cluster method with single and double excitations (CCSD), together with perturbative triple excitations (CCSD(T)). A large relativistic core-valence quintuple-zeta basis set has been employed. The calculated spectroscopic constants and molecular properties are compared with existing data in the literature. Further, the relevant vibrational parameters are determined by solving the vibrational Schrödinger equation utilizing potential energy curves and permanent dipole moment curves. Thereafter, spontaneous and black-body radiation induced transition rates are calculated to obtain the lifetimes of the vibrational states.

physics.atom-ph↗
arXiv2026

Fock-space relativistic coupled-cluster study of systematic shifts and fine-structure constant sensitivity in {\rm Cf$^{17+}$}, {\rm Cm$^{15+}$} and {\rm Bk$^{16+}$} highly charged ions

Highly charged ions (HCIs) are among the most promising candidates proposed for the development of next-generation optical clocks and the precision tests of fundamental physics. In this work, we investigate the clock-relevant properties of $\rm Cf^{17+}$, $\rm Cm^{15+}$ and $\rm Bk^{16+}$ HCIs using Fock-space relativistic coupled-cluster (FSRCC) theory. The corrections from Breit interaction, QED effects and perturbative triples are incorporated to improve the accuracy of results further. We compute excitation energies, transition amplitudes, lifetimes, hyperfine structure constants, electric quadrupole moments, and electric dipole polarizabilities for low-lying states of these ions. These properties are further used to characterize important clock transitions and estimate key systematic frequency shifts. Our calculations reveal that the proposed clock transitions exhibit strongly suppressed systematic frequency shifts. We also compute the sensitivity coefficients, $q$, and enhancement factors, $K_α$, for the proposed clock transition as a probe to variation in the fine-structure constant, $α$. Our calculations predict exceptionally large $K_α$ of $-55.3$ and $57.5$ for $5f_{5/2} \rightarrow 6p_{1/2}$ transition in $\rm Cf^{17+}$ and $6p_{1/2} \rightarrow 5f_{5/2}$ transition in $\rm Bk^{16+}$, respectively. These giant $K_α$s place the proposed transitions among the most sensitive optical probes for the laboratory searches for $α$ variation. Further, a comparative analysis of proposed transitions in $\rm Cm^{15+}$ and $\rm Bk^{16+}$ shows that, $5f_{5/2} \rightarrow 5f_{7/2}$ transition possess smaller systematic shifts and is therefore attractive for precision frequency metrology, whereas $6p_{1/2} \rightarrow 5f_{5/2}$ transition exhibit significantly enhanced sensitivity to $α$ variation.

physics.atom-ph↗
arXiv2026

Fault-tolerant hyper-Ramsey spectroscopy of optical clock transitions with dynamical decoupling

A probe laser field that interrogates an atomic transition also shifts it. Although Hyper-Ramsey (HR) spectroscopy was developed to mitigate these light-induced frequency shifts, the technique remains sensitive to probe intensity fluctuations. In this work, we introduce a novel class of dynamically decoupled hyper-Ramsey (DDHR) sequences that utilize a modified refocusing pulse to effectively eliminate this residual sensitivity. This three-pulse interferometric protocol significantly enhances the contrast of quantum interference fringes while providing robust immunity against probe-induced frequency shifts, even in the presence of external field inhomogeneities. We experimentally validate both HR and DDHR protocols on the NQCH and \textcolor{blue}{IQM} superconducting quantum processor, demonstrating an error scaling that is rigorously consistent with theoretical simulations of the optical clock regime. DDHR spectroscopy yields superior suppression of residual probe-induced frequency shifts compared to the standard HR scheme under probe amplitude fluctuation and decoherence. Furthermore, we demonstrate that the implementation of composite refocusing pulses, derived from a Pascal binomial tree architecture, gives substantial resilience against technical pulse area imperfections. Ultimately, fault-tolerant, dynamically decoupled hyper-clocks will offer a promising experimental platform for the evaluation of advanced, NMR-inspired DDHR sequences of multiple refocusing pulses holding significant potential for high-precision matter/antimatter quantum sensing and rigorous tests of fundamental physics within harsh electromagnetic environments.

physics.atom-ph↗