Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session U07: New Controls Over Cold Atomic Gases
2:00 PM–3:36 PM,
Thursday, June 8, 2023
Room: 206 B
Chair: Ben Olsen, Yale-NUS College
Abstract: U07.00006 : Sr polarizabilities, magic wavelengths, and their applications
3:00 PM–3:12 PM
Presenter:
Dmytro Filin
(University of Delaware)
Authors:
Dmytro Filin
(University of Delaware)
Charles Cheung
(University of Delaware)
Sergey G Porsev
(University of Delaware)
Marianna Safronova
(U Delaware)
technologies, including atomic clocks, atomtronic circuits, quantum simulation and computation,
and others. These applications use trapped ultracold atoms to precisely localize and control
them with minimum decoherence. Laser cooling, trapping, and control of atoms in optical potentials
requires knowledge of the polarizability of trapped atoms at a certain laser frequency. Magic
wavelength values where the polarizabilities of two states match and tune-out wavelengths where
the polarizability turns to zero are also needed for many applications. The main problem of accurately
computing the dynamic polarizabilities of multivalent atoms is a significant time that was
required to compute a data point at a specific wavelength, making the determination of magic and
tune-out wavelengths that require many data points for a range of wavelengths a difficult task. We
have developed a parallel automated polarizability code that allows us to efficiently compute polarizabilities
for a wide range of wavelength using a hybrid approach that combines a configuration
interaction and coupled-cluster methods. We tested this approach on the calculations of dynamic
polarizabilities for the 5s2 1S0, 5s5p 3P1,2,3, 5s5p 1P1 and 5s4d 1D2 states of Sr for a broad range of
wavelengths up to 2000 nm. The calculations include vector polarizabilities allowing one to compute
data for any laser polarization. We also present magic wavelengths and tune-out wavelengths and
several applications of our calculations. This approach can be used for a variety of systems beyond
Sr. All polarizability data will be made available at the Portal for High-Precision Atomic Data and
Computation [1].
[1] Parinaz Barakhshan, Adam Marrs, Akshay Bhosale, Bindiya Arora, Rudolf Eigenmann, Marianna
S. Safronova, Portal for High-Precision Atomic Data and Computation (version 2.0). University
of Delaware, Newark, DE, USA. URL: https://www.udel.edu/atom [April 2022].
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