Investigation of ac-Stark shifts in excited states of dysprosium relevant to testing fundamental symmetries

Abstract

We report on measurements of the differential polarizability between the nearly degenerate, opposite parity states in atomic dysprosium at 19797.96 cm${}^{-1}$. The differential scalar and tensor polarizabilities due to additional states were measured for the $|M|=7,...,10$ sublevels in ${}^{164}$Dy and ${}^{162}$Dy and determined to be ${\bar{\mathbf{\alpha }}}_{BA}^{(0)}=180(45{)}_{\text{stat}}(8{)}_{\text{sys}}$ $\text{mHz}/(\mathrm{V}/\mathrm{cm}{)}^2$ and ${\bar{\mathbf{\alpha }}}_{BA}^{(2)}=-163(65{)}_{\text{stat}}(5{)}_{\text{sys}}$ $\text{mHz}/(\mathrm{V}/\mathrm{cm}{)}^2$, respectively. The average blackbody radiation induced Stark shift of the Zeeman spectrum was measured around 300 K and found to be $-34(4)$ mHz/K and $+29(4)$ mHz/K for ${}^{164}$Dy and ${}^{162}$Dy, respectively. We conclude that ac-Stark related systematics will not limit a search for variation of the fine-structure constant, using dysprosium, down to the level of $|\dot{\alpha }/\alpha |=2.6\times 10^{-17}$ yr${}^{-1}$, for two measurements of the transition frequency one year apart.

10 pages, 8 figures

References in corpus (8)

• A Strongly Dipolar Bose-Einstein Condensate of Dysprosium
• Quantum degenerate dipolar Fermi gas
• Improved tests of Local Position Invariance using 87Rb and 133Cs fountains
• New limits on variation of the fine-structure constant using atomic dysprosium
• Limits on Violations of Lorentz Symmetry and the Einstein Equivalence Principle using Radio-Frequency Spectroscopy of Atomic Dysprosium
• Limit on the Temporal Variation of the Fine-Structure Constant Using Atomic Dysprosium
• Relativistic corrections to transition frequencies of Ag I, Dy I, Ho I, Yb II, Yb III, Au I and Hg II and search for variation of the fine structure constant
• Measurement of dynamic Stark polarizabilities by analyzing spectral lineshapes of forbidden transitions

Cited by in corpus (4)

• Search for ultralight scalar dark matter with atomic spectroscopy
• Parity-violating interactions of cosmic fields with atoms, molecules, and nuclei: Concepts and calculations for laboratory searches and extracting limits
• Strongly enhanced atomic parity violation due to close levels of opposite parity
• Long-Range Atom-Wall Interactions and Mixing Terms: Metastable Hydrogen