Magneto-optical trapping of barium

De, Sun; Dammalapati, U.; Jungmann, Klaus-Peter; Willmann, Lorenz

doi:10.1103/physreva.79.041402

Cited by 69 publications

(53 citation statements)

References 38 publications

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“…Atomic Sr, which was recently cooled to quantum degeneracy [25], is a strong contender of future optical clocks [26,27]. Experiments on Bose-Einstein statistics violations have used Ba as the target atom [28] and it is an ideal proxy, both for experimental [29] and theoretical [30] studies, of atomic Ra. An atom with large parity and time reversal violation effects [31], and promising candidate for future experiments.…”

Section: Introductionmentioning

confidence: 99%

Fock-space relativistic coupled-cluster calculations of two-valence atoms

Mani

Angom

2011

Phys. Rev. A

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We have developed an all particle Fock-space relativistic coupled-cluster method for two-valence atomic systems. We then describe a scheme to employ the coupled-cluster wave function to calculate atomic properties. Based on these developments we calculate the excitation energies, magnetic hyperfine structure constants and electric dipole matrix elements of Sr, Ba and Yb. Further more, we calculate the electric quadrupole HFS constants and the electric dipole matrix elements of Sr + , Ba + and Yb + . For these we use the one-valence coupled-cluster wave functions obtained as an intermediate in the two-valence calculations. We also calculate the magnetic dipole hyperfine structure constants of Yb + .

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Section: Introductionmentioning

confidence: 99%

Fock-space relativistic coupled-cluster calculations of two-valence atoms

Mani

Angom

2011

Phys. Rev. A

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“…Laser cooling on the strong 6s 2 1 S 0 − 6s6p 1 P 1 transition of barium requires to drive several repump transitions ( Fig. 1) at the same time [22,23] Table I is negligible. Additionally, losses from the cooling cycle of the MOT are determined in order to estimate branching ratios, which are otherwise difficult to access.…”

Section: Introductionmentioning

confidence: 99%

Lifetime determination of the5d23F2state in barium using trapped atoms

Dammalapati

Willmann

2015

Phys. Rev. A

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Magneto-optically trapped atoms enable the determination of lifetimes of metastable states and higher lying excited states like the 5d 2 3 F2 state in barium. The state is efficiently populated by driving strong transitions from metastable states within the cooling cycle of the barium MOT. The lifetime is inferred from the increase of MOT fluorescence after the transfer of up to 30 % of the trapped atoms to this state. The radiative decay of the 5d 2 3 F2 state cascades to the cooling cycle of the MOT with a probability of 96.0(7) % corresponding to a trap loss of 4.0(7) % and its lifetime is determined to 160(10) µs. This is in good agreement with the theoretically calculated lifetime of 190 µs [J. Phys. B, 40, 227 (2007)]. The determined loss of 4.0(7) % from the cooling cycle is compared with the theoretically calculated branching ratios. This measurement extends the efficacy of trapped atoms to measure lifetimes of higher, long-lived states and validate the atomic structure calculations of heavy multi-electron systems.

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“…Recently such systems have been seriously explored in alkaline-earth gases with the purpose of use for quantum computation (Daley et al 2008, Gorshkov et al 2009), and for testing SU (N )-models for large N (Gorshkov et al 2010, Xu 2010. Experiments are also on-going (Fukuhara et al 2009, De et al 2009). Nuclear physicists often use isospin as a quantum number representing the similarity of neutrons and protons in strong interactions (Siemens & Jensen 1987).…”

Section: Mapping Atomic and Nuclear Degrees Of Freedommentioning

confidence: 99%

Comparing and contrasting nuclei and cold atomic gases

Zinner¹,

Jensen²

2013

J. Phys. G: Nucl. Part. Phys.

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Abstract. The experimental revolution in ultracold atomic gas physics over the past decades have brought tremendous amounts of new insight to the world of degenerate quantum systems. Here we compare and constrast the developments of cold atomic gases with the physics of nuclei since many concepts, techniques, and nomenclatures are common to both fields. However, nuclei are finite systems with interactions that are typically much more complicated than those of ultracold atomic gases. The simularities and differences must therefore be carefully addressed for a meaningful comparison and to facilitate fruitful crossdisciplinary activity. We first consider condensates of bosonic and paired systems of fermionic particles with the mean-field description but take great care to point out potential problems in the limit of small particle numbers. Along the way we review some of the basic results of BEC and BCS theory, as well as the BCS-BEC crossover and the Fermi gas in the unitarity limit, all within the context of ultracold atoms. Subsequently, we consider the specific example of an atomic Fermi gas from a nuclear physics perspective, comparing degrees of freedom, interactions, and relevant length and energy scales of cold atoms and nuclei. Next we address some attempts in nuclear physics to transfer the concepts of condensates in nuclei that can in principle be built from bosonic alpha-particle constituents. We also consider Efimov physics, a prime example of nuclear physics transfered to cold atoms, and consider which systems are more likely to show interesting bound state spectra. Finally, we address some recent studies of the BCS-BEC crossover in light nuclei and compare them to the concepts used in ultracold atomic gases. While many-body concepts such as BEC or BCS states are applicable in both subfields, we find that the interactions and finite particle numbers in nuclei can obscure the clear meaning they have in cold atoms. On the other hand, universal results from atomic physics should have impact in certain limits of the nuclear domain. In particular, with advances in the trapping of few-body atomic systems we expect a more direct exchange of ideas and results.

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Magneto-optical trapping of barium

Cited by 69 publications

References 38 publications

Fock-space relativistic coupled-cluster calculations of two-valence atoms

Fock-space relativistic coupled-cluster calculations of two-valence atoms

Lifetime determination of the5d23F2state in barium using trapped atoms

Comparing and contrasting nuclei and cold atomic gases

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