Evolution dynamics of a dense frozen Rydberg gas to plasma
نویسندگان
چکیده
منابع مشابه
Frozen Rydberg Gas:
A frozen Rydberg gas is a sample of atoms with highly excited electronic states and very low temperature. In our experiments, Rb atoms are cooled and trapped in a magneto-optical trap (MOT) (fig.1&2), and excited to the Rydberg states (the principle quantum number n ~30) by pulsed dye lasers (fig.3). In such a system, the density of Rydberg atoms Nd is typically ~10atoms/cm, and the temperature...
متن کاملMany-body ionization in a frozen Rydberg gas.
In a dense gas of 300 microK 85Rb atoms of n approximately 50 ionization occurs on a 100 ns time scale, far too fast to be explained by the motion of the atoms or photoionization by 300 K blackbody radiation. Rapid ionization is accompanied by spectral broadening, with the spectrum becoming continuous at n=88 at a density of 5x10(10)cm(-3). The atomic transitions broaden both smoothly and by th...
متن کاملImaging the evolution of an ultracold strontium Rydberg gas
Clouds of ultracold strontium 5s48s S0 or 5s47d D2 Rydberg atoms are created by two-photon excitation of laser-cooled 5s2 S0 atoms. The spontaneous evolution of the cloud of low orbital angular momentum (low) Rydberg states towards an ultracold neutral plasma is observed by imaging resonant light scattered from core ions, a technique that provides both spatial and temporal resolution. Evolution...
متن کاملUltracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas
Within a dense environment (ρ ≈ 10 atoms=cm) at ultracold temperatures (T < 1 μK), a single atom excited to a Rydberg state acts as a reaction center for surrounding neutral atoms. At these temperatures, almost all neutral atoms within the Rydberg orbit are bound to the Rydberg core and interact with the Rydberg atom. We have studied the reaction rate and products for nS Rb Rydberg states, and ...
متن کاملSpectral linewidth broadening from pair fluctuations in a frozen Rydberg gas
Spectral linewidth broadening in Rydberg gases, a phenomenon previously attributed to the many-body effect, was observed experimentally almost a decade ago. The observed linewidth was typically 80–100 times larger than the average interaction strength predicted from a binary interaction. The interpretation of such a phenomenon is usually based on the so-called diffusion model, where the linewid...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2004
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.70.042713