Cold-Rydberg-gas dynamics

Walz-Flannigan, Alisa; Guest, Jeffrey R.; Choi, Jongsoo; Raithel, Georg

doi:10.1103/physreva.69.063405

Cited by 78 publications

(91 citation statements)

References 23 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our findings confirm certain theoretical predictions concerning the evolution of a cold Rydberg sample [9], and also agree with another recent experimental paper that reports similar results [17]. (However, we studied both the preavalanche and avalanche behaviors of the evolution process, whereas Ref.…”

Section: Introductionsupporting

confidence: 82%

“…Otherwise, the results of the three experiments are very similar, considering that the work reported in Ref. [17] was confined to initial Rydberg states with n Ͼ 50 due to a limitation of the magnitude of the field ionization pulse, whereas the UVA and LAC experiments probed down to 26d in cesium.…”

Section: Rydberg Population Redistributionmentioning

confidence: 49%

“…Specifically, WalzFlannigan et al [17] used a 100 K sample of Rydberg rubidium atoms at a maximum density of Ϸ1 ϫ 10 9 cm −3 . They found evidence for ᐉ mixing caused by electron-Rydbergatom collisions with a signature that is basically identical to that which we observed (e.g., the hump that ionizes in fields between one and four times the adiabatic limit for the initial Rydberg state populated by the laser in Figs.…”

Section: Rydberg Population Redistributionmentioning

confidence: 99%

“…(However, we studied both the preavalanche and avalanche behaviors of the evolution process, whereas Ref. [17] reports only on mechanisms during the avalanche process. )…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evolution dynamics of a dense frozen Rydberg gas to plasma

Noel

Robinson

et al. 2004

Phys. Rev. A

View full text Add to dashboard Cite

Dense samples of cold Rydberg atoms have previously been observed to spontaneously evolve to a plasma, despite the fact that each atom may be bound by as much as 100 cm −1 . Initially, ionization is caused by blackbody photoionization and Rydberg-Rydberg collisions. After the first electrons leave the interaction region, the net positive charge traps subsequent electrons. As a result, rapid ionization starts to occur after 1 s caused by electron-Rydberg collisions. The resulting cold plasma expands slowly and persists for tens of microseconds. While the initial report on this process identified the key issues described above, it failed to resolve one key aspect of the evolution process. Specifically, redistribution of population to Rydberg states other than the one initially populated was not observed, a necessary mechanism to maintain the energy balance in the system. Here we report new and expanded observations showing such redistribution and confirming theoretical predictions concerning the evolution to a plasma. These measurements also indicate that, for high n states of purely cold Rydberg samples, the initial ionization process which leads to electron trapping is one involving the interactions between Rydberg atoms.

show abstract

Section: Introductionsupporting

confidence: 82%

Section: Rydberg Population Redistributionmentioning

confidence: 49%

Section: Rydberg Population Redistributionmentioning

confidence: 99%

“…(However, we studied both the preavalanche and avalanche behaviors of the evolution process, whereas Ref. [17] reports only on mechanisms during the avalanche process. )…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evolution dynamics of a dense frozen Rydberg gas to plasma

Noel

Robinson

et al. 2004

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…For intermediate delay times ͑⌬t ex =8 s͒, the signal extends to both earlier and later times, signifying a redistribution of Rydberg atoms over states with both higher and lower principle quantum number n, due to interactions with electrons. 16 Finally, at even longer delay times ͑⌬t ex =22 s͒, a large peak appears at very low electric field that corresponds to weakly bound electrons, consistent with the formation of an UCP. This peak corresponds to a 1.2 pC electron pulse with a rms width of 200 ns and a peak current of 2.3 A.…”

Section: Experimental Routine and Setupmentioning

confidence: 77%

Cold electron and ion beams generated from trapped atoms

et al. 2007

View full text Add to dashboard Cite

A novel way of creating low-temperature electron and ion beams is demonstrated. The beams are generated by converting a laser-cooled atom cloud to a highly excited Rydberg gas, which subsequently develops into an ultracold plasma. Charged particles are extracted from the Rydberg gas and the plasma by a pulsed electric field. The properties of the resulting electron and ion pulses are experimentally studied. Pulses of a few hundred ns duration containing a few pC of charge were observed. Upper limits for the temperature of such beams (60K for ions and 500K for electrons) are obtained, and the beams are shown to have low emittance. Further development of the method may lead to the generation of high-brightness charged-particle beams from ultracold plasmas.

show abstract

High Resolution Rydberg Spectroscopy of Ultracold Rubidium Atoms

Pfau¹,

Heidemann²,

Grabowski³

et al. 2007

Elements of Quantum Information

View full text Add to dashboard Cite

A xelG rabow ski ,R ol f H ei dem ann, R obert L ow ,J urgen Stuhl er, and T i l m an Pfau 5.Physikal isches Institut, U niversit at Stuttgart, Pfa enwal dring 57, 70550 Stuttgart, G erm any (D ated: A ugust 25,2016) W e present experi m ents on tw o-photon exci tati on of 87 R b atom s to R ydberg states. For thi s purpose, tw o conti nuous-w ave (cw )-l aser system s for both 780 nm and 480 nm have been set up. T hese system s are opti m i zed to a sm al l l i new i dth (w el l bel ow 1 M H z) to get both an e ci ent exci tati on process and good spectroscopi c resol uti on. To test the perform ance ofour l aser system , w e i nvesti gated the Stark spl i tti ng ofR ydberg states. For n= 40 w e w ere abl e to see the hyper ne l evel sspl i tti ng i n the el ectri cal el d fordi erent nestructure states. To show the abi l i ty ofspati al l y sel ecti ve exci tati on to R ydberg states,w e exci ted rubi di um atom s i n an el ectri cal el d gradi ent and i nvesti gated both l i new i dthsand l i neshi fts. Furtherm ore w e w ere abl e to exci te the atom ssel ecti vel y from the tw o hyper ne ground states to R ydberg states. Fi nal l y,w e i nvesti gated the A utl er-Tow nes spl i tti ng ofthe 5S 1=2 ! 5P 3=2 transi ti on vi a a R ydberg state to determ i ne the R abifrequency ofthi s exci tati on step. I. IN T R O D U C T IO N

show abstract

Cold-Rydberg-gas dynamics

Cited by 78 publications

References 23 publications

Evolution dynamics of a dense frozen Rydberg gas to plasma

Evolution dynamics of a dense frozen Rydberg gas to plasma

Cold electron and ion beams generated from trapped atoms

High Resolution Rydberg Spectroscopy of Ultracold Rubidium Atoms

Contact Info

Product

Resources

About