Journal
PHYSICAL REVIEW A
Volume 99, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.99.022515
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Funding
- National Research Foundation, Prime Ministers Office, Singapore
- Ministry of Education, Singapore under the Research Centres of Excellence programme
- A*STAR SERC 2015 Public Sector Research Funding (PSF) Grant (SERC Project) [1521200080]
- Lee Kuan Yew post-doctoral fellowship
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The influence of oscillating quadrupole fields on atomic energy levels is examined theoretically, and general expressions for the quadrupole matrix elements are given. The results are relevant to any ion-based clock in which one of the clock states supports a quadrupole moment. Clock shifts are estimated for Lu-176(+) and indicate that coupling to the quadrupole field would not be a limitation to clock accuracy at the less than or similar to 10(-19) level. Nevertheless, a method is suggested that would allow this shift to be calibrated. This method utilizes a resonant quadrupole coupling that enables the quadrupole moment of the atom to be measured. A proof-of-principle demonstration is given using Ba-138(+), in which the quadrupole moment of the D-5/2 state is estimated to be Theta = 3.229(89)ea(0)(2).
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