The role of Coulomb anti-blockade in the photoassociation of long-range Rydberg molecules

Abstract

We present a new mechanism contributing to the detection of photoassociated long-range Rydberg molecules via pulsed-field ionization: ionic products, created by the decay of a long-range Rydberg molecule, modify the excitation spectrum of surrounding ground-state atoms and facilitate the excitation of further atoms into Rydberg states by the photoassociation light. Such an ion-mediated excitation mechanism has been previously called "Coulomb anti-blockade". Pulsed-field ionisation typically doesn't discriminate between the ionization of a long-range Rydberg molecule and an isolated Rydberg atom, and thus the number of atomic ions detected by this mechanism is not proportional to the number of long-range Rydberg molecules present in the probe volume. By combining high-resolution UV and RF spectroscopy of a dense, ultracold gas of cesium atoms, theoretical modeling of the molecular level structures of long-range Rydberg molecules bound below nP_3/2 Rydberg states of cesium, and a rate model of the photoassociation and decay processes, we unambiguously identify the signatures of this detection mechanism in the photoassociation of long-range Rydberg molecules bound below atomic asymptotes with negative Stark shifts.

arXiv comment8 pages, 7 figures

References in corpus (23)

• Full counting statistics and phase diagram of a dissipative Rydberg gas
• Production of trilobite Rydberg molecule dimers with thousand-Debye permanent electric dipole moments
• Full counting statistics of laser excited Rydberg aggregates in a one-dimensional geometry
• A mesoscopic Rydberg impurity in an atomic quantum gas
• Ultracold Rydberg Molecules
• Experimental characterization of singlet scattering channels in long-range Rydberg molecules
• Ultracold chemical reactions of a single Rydberg atom in a dense gas
• Precision measurement of the ionization energy of Cs I
• A Hamiltonian for the inclusion of spin effects in long-range Rydberg molecules
• Spatial imaging of a novel type of molecular ions
• Long-range Rydberg-atom-ion molecules of Rb and Cs
• Giant cross section for molecular ion formation in ultracold Rydberg gases
• Long-range atom-ion Rydberg molecule: A novel molecular binding mechanism
• Probing Nonlocal Spatial Correlations in Quantum Gases with Ultra-long-range Rydberg Molecules
• Deeply bound (24$D_J$ + 5$S_{1/2}$) ${}^{87}$Rb and ${}^{85}$Rb molecules for eight spin couplings
• Heteronuclear long-range Rydberg molecules
• Observation of spin-orbit-dependent electron scattering using long-range Rydberg molecules
• Heteronuclear Rydberg molecules
• Formation of ultracold ion pairs through long-range Rydberg molecules
• An ultracold heavy Rydberg system formed from ultra-long-range molecules bound in a stairwell potential
• Coulomb anti-blockade in a Rydberg dressed gas
• Photodissociation of long-range Rydberg molecules
• A tunable low-drift laser stabilized to an atomic reference

Cited by in corpus (3)

• Green's function treatment of Rydberg molecules with spins
• Individual assembly of two-species Rydberg molecules using optical tweezers
• Spin-orbit-dependent lifetimes of long-range Rydberg molecules