Measurement of Parity Nonconservation and an Anapole Moment in Cesium

Wood, C. S.; Bennett, S. C.; Cho, D.; Masterson, B. P.; Roberts, Jacob; Tanner, Carol E.; Wieman, Carl

doi:10.1126/science.275.5307.1759

Cited by 1,123 publications

(1,223 citation statements)

References 29 publications

Supporting

Mentioning

1,149

Contrasting

Unclassified

Order By: Relevance

“…The first-order Uehling shifts and the breakdown of the core relaxation contributions for the lowest five valence levels of Cs are presented in Table II. In the second column the first-order results δ (1) are given. In the final two columns, the shifts due to core relaxation are presented, divided into the direct and exchange contributions.…”

Section: Core Relaxationmentioning

confidence: 99%

“…Obviously, since the Uehling potential acts at a distance close to the nuclear radius, ϕ Br |V Ueh |ϕ Br = c 2 ϕ|V Ueh |ϕ . If the range of the correction to the Hartree-Fock potential δV Ueh HF were within a B , then ϕ Br |V Ueh +δV Ueh HF |ϕ Br = c 2 ϕ|V Ueh +δV Ueh HF |ϕ also, i.e., δ Br = c 2 δ = (δ (1) Br /δ (1) )δ . We do notice some deviation from this relation, which is a result of the long range of the relaxation correction to the HartreeFock potential; this range indeed extends beyond r = a B , as we saw in the previous section.…”

Section: Exp Amentioning

confidence: 99%

See 1 more Smart Citation

QED radiative corrections and many-body effects in atoms: vacuum polarization and binding energy shifts in alkali metals

Ginges

Berengut

2016

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

View full text Add to dashboard Cite

We calculate vacuum polarization corrections to the binding energies in neutral alkali atoms Na through to the superheavy element E119. We employ the relativistic Hartree-Fock method to demonstrate the importance of relaxation of the electronic core and the correlation potential method to study the effects of second and higher orders of perturbation theory. These many-body effects are sizeable for all orbitals, though particularly important for orbitals with angular momentum quantum number l > 0. The orders of magnitude enhancement for d waves produces shifts that, for Rb and the heavier elements, are larger than those for p waves and only an order of magnitude smaller than the s-wave shifts. The many-body enhancement mechanisms that operate for vacuum polarization apply also to the larger self-energy corrections.

show abstract

Section: Core Relaxationmentioning

confidence: 99%

Section: Exp Amentioning

confidence: 99%

QED radiative corrections and many-body effects in atoms: vacuum polarization and binding energy shifts in alkali metals

Ginges

Berengut

2016

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

View full text Add to dashboard Cite

show abstract

“…Given the universality of this PVED, it has been suggested as a possible origin of biological homochirality, although due to its small value, the enantioselection would have taken place through powerful mechanisms of amplification as those involving nonlinear processes in systems far from equilibrium. 4,5 Although the weak interaction has been extensively studied and observed in atoms, 6,7 it has only been predicted in molecules. Electroweak quantum chemistry calculations predict the PVED to be between 10 À13 and 10 À21 eV [8][9][10][11] but no conclusive energy difference has been reported, for instance, in experimental spectroscopic studies of the CHBrClF molecule reaching an energy resolution of about 10 À15 eV.…”

Section: Introductionmentioning

confidence: 99%

Quantum stochastic resonance in parity violating chiral molecules

Bargueño

Miret‐Artés

Gonzalo

2011

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

In order to explore parity violating effects in chiral molecules, of interest in some models of evolution towards homochirality, quantum stochastic resonance (QSR) is studied for the population difference between the two enantiomers of a chiral molecule (hence for the optical activity of the sample), under low viscous friction and in the deep quantum regime. The molecule is described by a two-state model in an asymmetric double well potential where the asymmetry is given by the known predicted parity violating energy difference (PVED) between enantiomers. In the linear response to an external driving field that lowers and rises alternatively each one of the minima of the well, a signal of QSR is predicted only in the case that the PVED is different from zero, the resonance condition being independent on tunneling between the two enantiomers. It is shown that, at resonance, the fluctuations of the first order contribution to the internal energy are zero. Due to the small value of the PVED, the resonance would occur in the ultracold regime. Some proposals concerning the external driving field are suggested.

show abstract

“…We are currently working on improving the number of trapped atoms by using a double MOT system and thus having a much longer trap life-time. Radioactive 210 Fr has a lifetime of approximately 3 min which, when contained in a trap, is long enough to perform the sequence of measurements necessary for determining the parity violation signal [21]. With respect to other precision spectroscopy to test discrete symmetries, Romalis and Fortson [24] have shown that to perform a more sensitive test of time invariance with trapped atoms in a dipole trap than presently done, it is necessary to have about 10 8 trapped atoms interrogated for about 10 s.…”

Section: Discussionmentioning

confidence: 99%