Production of very-high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi></mml:math>strontium Rydberg atoms

Ye, S.; Zhang, X.; Killian, T. C.; Dunning, F. B.; Hiller, Moritz; Yoshida, Shuhei; Nagele, Stefan; Burgdörfer, Joachim

doi:10.1103/physreva.88.043430

Cited by 43 publications

(39 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculated quantum defects μ L agree well with the measured values [26,27]. The small discrepancies in the D state peak positions as compared to experimental measurements are partly due to n dependences in the quantum defect (n 50 for the theory and n 274 for the experiment) and partly due to the inaccuracy of the model potential [20]. …”

Section: A Quantum Descriptionsupporting

confidence: 75%

“…(In the following, L indicates the total orbital angular momentum while denotes that of a single electron.) This calculation employs the TAE model described in more detail elsewhere [20]. Briefly, the Hamiltonian…”

Section: A Quantum Descriptionmentioning

confidence: 99%

“…II. In the subsequent sections we review the theoretical models used to describe the excitation process, which are based on the two-active-electron (TAE) model [20] (Sec. III), and the classical ionization dynamics underlying the probing techniques (Sec.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterizing high-nquasi-one-dimensional strontium Rydberg atoms

et al. 2014

Self Cite

View full text Add to dashboard Cite

The production of high-n, n ∼ 300, quasi-one-dimensional (quasi-1D) strontium Rydberg atoms through two-photon excitation of selected extreme Stark states in the presence of a weak dc field is examined using a crossed laser-atom beam geometry. The dipolar polarization of the electron wave function in the product states is probed using two independent techniques. The experimental data are analyzed with a classical trajectory Monte Carlo simulation employing initial ensembles that are obtained with the aid of quantum calculations based on a two-active-electron model. Comparisons between theory and experiment highlight different characteristics of the product quasi-1D states, in particular, their large permanent dipole moments, ∼1.0 to 1.2n 2 ea 0 , where e is the electronic charge and a 0 is the Bohr radius. Such states can be engineered using pulsed electric fields to create a wide variety of target states.

show abstract

Section: A Quantum Descriptionsupporting

confidence: 75%

Section: A Quantum Descriptionmentioning

confidence: 99%

See 1 more Smart Citation

Characterizing high-nquasi-one-dimensional strontium Rydberg atoms

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the laboratory, Rydberg atoms and molecules are usually formed by photoexcitation from lower-lying electronic states and refined schemes enable one to selectively access states of almost any values of the quantum numbers n, and m, remarkable examples being the production of states of very high principal quantum number [18] or states of maximal m value [19,20]. Rydberg states are also formed by recombination of an electron and a cation in any environment where electrons and cations are present, such as in plasmas or in ionized regions of the interstellar medium.…”

Section: Introductionmentioning

confidence: 99%

Radiative and collisional processes in translationally cold samples of hydrogen Rydberg atoms studied in an electrostatic trap

Seiler¹,

Agner²,

Pillet³

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

Supersonic beams of hydrogen atoms, prepared selectively in Rydberg-Stark states of principal quantum number n in the range between 25 and 35, have been deflected by 90 ○ , decelerated and loaded into off-axis electric traps at initial densities of ≈ 10 6 atoms/cm −3 and translational temperatures of 150 mK. The ability to confine the atoms spatially was exploited to study their decay by radiative and collisional processes. The evolution of the population of trapped atoms was measured for several milliseconds in dependence of the principal quantum number of the initially prepared states, the initial Rydberg-atom density in the trap, and the temperature of the environment of the trap, which could be varied between 7.5 K and 300 K using a cryorefrigerator. At room temperature, the population of trapped Rydberg atoms was found to decay faster than expected on the basis of their natural lifetimes, primarily because of absorption and emission stimulated by the thermal radiation field. At the lowest temperatures investigated experimentally, the decay was found to be multiexponential, with an initial rate scaling as n −4 and corresponding closely to the natural lifetimes of the initially prepared Rydberg-Stark states. The decay rate was found to continually decrease over time and to reach an almost n-independent rate of more than (1 ms) −1 after 3 ms. To analyze the experimentally observed decay of the populations of trapped atoms, numerical simulations were performed which included all radiative processes, i.e., spontaneous emission as well as absorption and emission stimulated by the thermal radiation. These simulations, however, systematically underestimated the population of trapped atoms observed after several milliseconds by almost two orders of magnitude, although they reliably predicted the decay rates of the remaining atoms in the trap. The calculations revealed that the atoms that remain in the trap for the longest times have larger absolute values of the magnetic quantum number m than the optically prepared RydbergStark states, and this observation led to the conclusion that a much more efficient mechanism than a purely radiative one must exist to induce transitions to Rydberg-Stark states of higher m values. While searching for such a mechanism, we discovered that resonant dipole-dipole collisions between Rydberg atoms in the trap represent an extremely efficient way of inducing transitions to states of higher m values. The efficiency of the mechanism is a consequence of the almost perfectly linear nature of the Stark effect at the moderate field strengths used to trap the atoms, which permits cascades of transitions between entire networks of near-degenerate Rydberg-atom-pair states. To include such cascades of resonant dipole-dipole transitions in the numerical simulations, we have generalized the two-state Förster-type collision model used to describe resonant collisions in ultracold Rydberg gases to a multi-state situation. It is only when considering the combined effects of collisional and radiative pr...

show abstract

Section: The Two-atom Schemementioning

confidence: 99%

Deterministic entanglement generation between a pair of atoms on different Rydberg states via chirped adiabatic passage

Qian¹,

Zhang²

2017

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

Abstract. We develop a scheme for deterministic generation of an entangled state between two atoms on different Rydberg states via a chirped adiabatic passage, which directly connects the initial ground and target entangled states and also does not request the normally needed blockade effect. The occupancy of intermediate states suffers from a strong reduction via two pulses with proper time-dependent detunings and the electromagnetically induced transparency condition. By solving the analytical expressions of eigenvalues and eigenstates of a two-atom system, we investigate the optimal parameters for guaranteeing the adiabatic condition. We present a detailed study for the effect of pulse duration, changing rate, different Rydberg interactions on the fidelity of the prepared entangled state with experimentally feasible parameters, which reveals a good agreement between the analytic and full numerical results.

show abstract

Production of very-high-nstrontium Rydberg atoms

Cited by 43 publications

References 36 publications

Characterizing high-nquasi-one-dimensional strontium Rydberg atoms

Characterizing high-nquasi-one-dimensional strontium Rydberg atoms

Radiative and collisional processes in translationally cold samples of hydrogen Rydberg atoms studied in an electrostatic trap

Deterministic entanglement generation between a pair of atoms on different Rydberg states via chirped adiabatic passage

Contact Info

Product

Resources

About