High precision calculation for the development of atomic clock and the search beyond the standard model
Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Delaware
Abstract
The primary motivation of this work is the development of atomic clocks and
the searches for new physics beyond the standard model. Optical clocks based on the
forbidden transitions in an atom have been shown to be promising candidates for a
better frequency standard. The search for new physics beyond the standard model
can be done by looking for tiny deviations of atomic properties which is not expected
by this model. Highly precise calculations for atomic systems are needed to provide
further understanding in these studies. ☐ The main formalisms that we use for the calculation on the atomic systems
are all-order method, which is based on linear single double coupled cluster (LCCSD)
method, and the combination of configuration interaction (CI) and all-order meth-
ods. These methods are suitable to study open-shell atomic systems and capable of
calculating the electron correlations up to all order. ☐ In this work, we carried out the following calculations. First, we proposed a
new method of determining transition matrix elements using the measurement of magic
wavelength in Sr lattice clock. Next, we calculated the blackbody radiation shift in Tl +
and Hg, the magic wavelength in Hg, and the hyperfine quenching rate in Cd. Next,
we developed a method to calculate the specific mass shift in the all-order formalism
and apply it to Na, K, and Rb atoms. Next, we calculated Ra atomic properties for
electric dipole moment (EDM) experiments, and parity non-conserving amplitude of
Cs and Fr. Finally, we calculated the energies and transition matrix elements of highly
charged Mo and Tc ions.
Description
Keywords
Pure sciences, Atomic clock, Atomic theory, Beyond the standard model, Quantum mechanics