77 citations · 437 across the 24 of their papers we have counts for
24 papers
Laser-assisted binding of ultracold polar molecules with Rydberg atoms in the van der Waals regime
Vanessa Olaya, Jesús Pérez-Ríos, Felipe Herrera
We study ultracold long-range collisions of heteronuclear alkali-metal dimers with a reservoir gas of alkali-metal Rydberg atoms in a two-photon laser excitation scheme. In a low d…
Ozone formation in ternary collisions: Theory and experiment reconciled
Marjan Mirahmadi, Jesús Pérez-Ríos, Oleg Egorov +2
Absorbing UV radiation, ozone protects life on Earth and plays a fundamental role in Earth's temperature balance. The formation of ozone occurs through the ternary recombination re…
Is CCSD(T) a proper standard for dipole moment calculations? An analysis considering diverse diatomic species
Xiangyue Liu, Laura McKemmish, Jesús Pérez-Ríos
Coupled cluster with single, double, and perturbative triple excitations [CCSD(T)] has been extensively employed as the reference method in benchmarking different quantum chemistry…
Electric field dissociation of weakly bound molecular ions
Jesús Pérez-Ríos
We present a full quantal study on the dissociation of a weakly bound molecular ion in the presence of an external time-dependent electric field. We focus on the dissociation dynam…
Rydberg atom-ion collisions in cold environments
Henrik Hirzler, Jesús Pérez-Ríos
Low-energy collisions of Rydberg atom-ion systems are investigated theoretically. We present the parameter space associated with suitable approaches for the dynamics of Rydberg ato…
On the universality of spectroscopic constants of diatomic molecules
Xiangyue Liu, Gerard Meijer, Jesús Pérez-Ríos
We show, through a machine learning approach, that the equilibrium distance, harmonic vibrational frequency, and binding energy of diatomic molecules are universally related. In pa…
Controlling the nature of a charged impurity in a bath of Feshbach dimers
Henrik Hirzler, Eleanor Trimby, Rianne S. Lous +3
We theoretically study the dynamics of a trapped ion that is immersed in an ultracold gas of weakly bound atomic dimers created by a Feshbach resonance. Using quasi-classical simul…
coefficients for interacting Rydberg atoms and alkali-metal dimers
Vanessa Olaya, Jesús Pérez-Ríos, Felipe Herrera
We study the van der Waals interaction between Rydberg alkali-metal atoms with fine structure (; ) and heteronuclear alkali-metal dimers in the ground rovibrationa…
Direct Detection of Spin-(In)dependent Nuclear Scattering of Sub-GeV Dark Matter Using Molecular Excitations
Rouven Essig, Jesús Pérez-Ríos, Harikrishnan Ramani +1
We propose a novel direct detection concept to search for dark matter with 100~keV to 100~MeV masses. Such dark matter can scatter off molecules in a gas and transfer an $\mathcal{…
Current and future perspectives of positronium and muonium spectroscopy as dark sectors probe
Claudia Frugiuele, Jesús Pérez-Ríos, Clara Peset
Positronium and Muonium are purely leptonic atoms and hence free of an internal sub-structure. This qualifies them as potentially well suited systems to probe the existence of phys…
Universal temperature dependence of the ion-neutral-neutral three-body recombination rate
Jesús Pérez-Ríos, Chris H. Greene
A classical approach based on hyperspherical coordinates is used to derive a first principle formulation of the the ion-neutral-neutral three-body recombination rate, A + A + A…
Observation of Quantum Interference and Coherent Control in a Photochemical Reaction
David B. Blasing, Jesús Pérez-Ríos, Yangqian Yan +4
Coherent control of reactants remains a longstanding challenge in quantum chemistry. In particular, we have studied laser-induced molecular formation (photoassociation) in a Raman-…
Vibrational quenching and reactive processes of weakly bound molecular ion-atom collisions at cold temperatures
Jesús Pérez-Ríos
We present a study of vibrational quenching and chemical processes of molecular ions immersed in an ultracold atomic gas by means of the quasi-classical trajectory (QCT) method. In…
Genetic fitting techniques for precision ultracold spectroscopy
Ian Stevenson, Jesús Pérez-Ríos
We present development of a genetic algorithm for fitting potential energy curves of diatomic molecules to experimental data. Our approach does not involve any functional form for…
Two-photon photoassociation spectroscopy of an ultracold heteronuclear molecule
Sourav Dutta, Jesús Pérez-Ríos, D. S. Elliott +1
We report on two-photon photoassociation (PA) spectroscopy of ultracold heteronuclear LiRb molecules. This is used to determine the binding energies of the loosely bound levels of…
Short-range Photoassociation of LiRb
David B. Blasing, Ian C. Stevenson, Jesús Pérez-Ríos +2
We have observed short-range photoassociation of LiRb to the two lowest vibrational states of the potential. These molecules then spontaneously decay to vibration…
Controlling Rydberg atom excitations in dense background gases
Tara Cubel Liebisch, Michael Schlagmüller, Felix Engel +13
We discuss the density shift and broadening of Rydberg spectra measured in cold, dense atom clouds in the context of Rydberg atom spectroscopy done at room temperature, dating back…
Ultracold chemical reactions of a single Rydberg atom in a dense gas
Michael Schlagmüller, Tara Cubel Liebisch, Felix Engel +10
Within a dense environment (atoms/cm) at ultracold temperatures (), a single atom excited to a Rydberg state acts as a reaction center for…
Mapping trilobite state signatures in atomic hydrogen
Jesús Pérez-Ríos, Matthew T Eiles, Chris H Greene
A few-body approach relying on static line broadening theory is developed to treat the spectroscopy of a single Rydberg excitation to a trilobite-like state immersed in a high dens…
Effective Single Photon Decay Mode of Positronium Decay via Electroweak Interactions
Jesús Pérez-Ríos, Sherwin T. Love
We consider the decay of positronium to a neutrino-antineutrino accompanied by a single photon. Since the neutrino pair go undetected, this appears as a single photon decay of posi…
Universal threshold law for ion-neutral-neutral three-body recombination
Jesús Pérez-Ríos, Chris H. Greene
A very recently method for classical trajectory calculations for three-body collision [J. Pérez-Ríos, S. Ragole, J. Wang and C. H. Greene, J. Chem. Phys. {\bf 140}, 044307 (2014)]…
Two-Photon Total Annihilation of Molecular Positronium
Jesús Pérez-Ríos, Sherwin T. Love, Chris H. Greene
The rate for complete two-photon annihilation of molecular positronium Ps is reported. This decay channel involves a four-body collision among the fermions forming Ps,…
How does a magnetic trap work?
J. Pérez-Ríos, A. S. Sanz
Magnetic trapping is a cornerstone for modern ultracold physics and its applications (e.g., quantum information processing, quantum metrology, quantum optics, or high-resolution sp…
Effect of the anisotropy on the glory structure of molecule-molecule scattering cross sections
Jesús Pérez-Ríos, Massimiliano Bartolomei, José Campos-Martínez +1
Total (elastic + rotationally inelastic) integral cross sections are computed for O-O using a recent ab initio potential energy surface. The sampled veloc…