Intrinsic Electric Dipole Moments of Paramagnetic Atoms: Rubidium and Cesium

Abstract

The electric dipole moment (EDM) of paramagnetic atoms is sensitive to the intrinsic EDM contribution from that of its constituent electrons and a scalar-pseudoscalar (S-PS) electron-nucleus interaction. The electron EDM and the S-PS contributions to the EDMs of these atoms scale as approximately Z;{3}. Thus, the heavy paramagnetic atoms will exhibit large EDM enhancement factors. However, the sizes of the couplings are so small that they are of interest of high precision atomic experiments. In this work we have computed the EDM enhancement factors of the ground states of Rb and Cs due to both the electron EDM and the S-PS EDM using the relativistic coupled-cluster theory. The importance of determining precise ab initio enhancement factors and experimental results of atomic EDMs in deducing a reliable limit on the electron EDM is emphasized.

Oriented Polar Molecules in a Solid Inert-Gas Matrix: A Proposed Method for Measuring the Electric Dipole Moment of the Electron

“…Other authors have explored [25] the possibility of using atoms within an inert-gas matrix to measure d e . Using atoms instead of molecules has the advantage of less complicated, and more easily calculated, quantum states, but has the drawback of the much smaller E eff (of approximately 100 times the applied field [26]). Nonetheless, the possibility of using atoms may have to be reevaluated in light of the much larger applied electric fields recently demonstrated in Reference [14], although these fields will still lead to an E eff of approximately 100 MV/cm, compared to the approximately 100 GV/cm fields obtained with polar molecules.…”

Reappraisal of the Electric Dipole Moment Enhancement Factor for Thallium

“…Thus, the primary focus of this Letter is to determine the EDM EF of Tl by proceeding beyond [9,10]. An accurate treatment of the unusually strong electron correlation effects in the ground state Tl EDM EF warrants the use of an all-order relativistic many-body method like the RCC theory.The open-shell RCC theory with single, double and a subset of leading triple excitations employed in the calculation of the EDM EFs is discussed in detail in [14][15][16]. However, we briefly present below the salient features of this method for the sake of completeness.…”

Conforming the measured lifetimes of the5d2D3/2,5/2states in Cs with theory

“…In fact, one of the reasons why experiments on the alkali atoms are so popular because many calculations of the ground and excited states properties are already performed that are as precise as the experimental results. This provides good test of validity of both the experimental and theoretical results and entrust confidence to infer many fundamental physics by combining these results [7,8,[10][11][12]. However, it is still found conflicts between the theoretical and experimen- * Email: bijaya@prl.res.in tal results of these atoms in few cases; especially while studying properties of the excited states.…”

“…Few such categorical experiments are quantum computing [3,4], observing parity nonconservation (PNC) effects to probe new particle physics [5,6] and exotic property like nuclear anapole moment (NAM) [7,8], measuring electric dipole moment (EDM) due to parity and time reversal symmetry violations [9,10] etc.. In most of these studies, roles of accuracies in the theoretical calculations of various atomic properties are of also crucial [8,[10][11][12][13][14][15]. In fact, one of the reasons why experiments on the alkali atoms are so popular because many calculations of the ground and excited states properties are already performed that are as precise as the experimental results.…”