Ultrafast many-body dynamics of dense Rydberg gases and ultracold plasma
arXiv:2510.26319 · doi:10.1038/s42005-026-02674-9
Abstract
Understanding Coulomb driven many-body dynamics in ultracold atomic systems far from equilibrium remains an open challenge, particularly when ultrafast excitation channels create competing pathways toward Rydberg gases or ultracold plasmas. Here, we investigate the many-body dynamics in a Rb Bose-Einstein condensate after exposure to a single femtosecond laser pulse. By tuning the laser wavelength across the two-photon ionization threshold, we can control the initial state that is either dominated by free electrons and leads to an ultracold plasma or dominated by electrons in excited states which leads to a dense Rydberg gas. The large bandwidth enables overcoming the Rydberg blockade that limits the excitation density for narrow-linewidth lasers. We directly measure the kinetic energy of the released electrons and compare the final distribution of free, bound and plasma electrons to molecular dynamics simulations where the electrons are modeled as individual particles including collisional ionization and recombination processes. We find very good agreement between the simulated electron distribution and the experimental observation. We identify charge imbalance as main driver for the decay of a dense Rydberg gas into an ultracold plasma.
arXiv comment10 pages, 8 figures
References in corpus (33)
- Observation of Rydberg blockade between two atoms
- Ultrafast active plasmonics: transmission and control of femtosecond plasmon signals
- Observation of collective excitation of two individual atoms in the Rydberg blockade regime
- Synthetic three-dimensional atomic structures assembled atom by atom
- ARC: An open-source library for calculating properties of alkali Rydberg atoms
- Creation of an Ultracold Neutral Plasma
- Laser-driven nonlinear cluster dynamics
- Metal-Insulator Transition in Disordered Two-Dimensional Electron Systems
- High harmonic imaging of ultrafast many-body dynamics in strongly correlated systems
- Coupling a single electron to a Bose-Einstein condensate
- Ultracold Neutral Plasmas
- Ultrafast energy exchange between two single Rydberg atoms on the nanosecond timescale
- Strong-Field Many-Body Physics and the Giant Enhancement in the High-Harmonic Spectrum of Xenon
- Signatures of Self-Organised Criticality in an Ultracold Atomic Gas
- Direct observation of ultrafast many-body electron dynamics in an ultracold Rydberg gas
- Plasma formation from ultracold Rydberg gases
- Strongly correlated two-dimensional plasma explored from entropy measurements
- Photoionization of ultracold and Bose-Einstein condensed Rb atoms
- Coincidence spectroscopy of high-lying Rydberg states produced in strong laser fields
- Strongly Coupled Plasmas via Rydberg-Blockade of Cold Atoms
- Complete photoionization experiments via ultra-fast coherent control with polarization-multiplexing
- Ionization of Rydberg atoms embedded in an ultracold plasma
- Absolute strong-field ionization probabilities of ultracold rubidium atoms
- Ultrafast creation of overlapping Rydberg electrons in an atomic BEC and Mott-insulator lattice
- A high resolution ion microscope for cold atoms
- On the formation and decay of a molecular ultracold plasma
- Ultrafast Electron Cooling in an Expanding Ultracold Plasma
- Quantum mechanical calculation of Rydberg-Rydberg autoionization rates
- Photoionization of Rydberg Atoms in Optical Lattices
- Ultra-large Rydberg dimers in optical lattices
- Simulations of prompt many-body ionization in a frozen Rydberg gas
- Shaped free electron vortices
- Generation of 480 nm picosecond pulses for ultrafast excitation of Rydberg atoms