2017/12/31 by Anal Bhowmik, Narendra Nath Dutta, Sonjoy Majumder
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic physics #Beam (structure) #Cold Atom Physics and Bose-Einstein Condensates #Gaussian beam #Infrared #Laguerre polynomials #MAGIC (telescope) #Optics #Orbital Angular Momentum in Optics #Physics #Quantum mechanics #Wavelength #physics.atom-ph
paper · pdf · doi:10.1103/physreva.97.022511
published as Phys. Rev. A 97, 022511 (2018) · 24 pages, 6 Tables, 5 Figures
openalex created_date 2018/01/05 · arxiv created 2018/02/21 · openalex publication_date 2018/02/21 · arxiv updated 2018/02/23 · openalex updated_date 2026/08/05
We present in this paper a theory of dynamic polarizability for an atomic state due to an external field of nonparaxial Laguerre-Gaussian (LG) beam using the sum-over-states technique. A highly correlated relativistic coupled-cluster theory is used to evaluate the most important and correlation-sensitive parts of the sum. The theory is applied on Sr+ to determine the magic wavelengths for 5s1/2\ensuremath→4d3/2,4d5/2 transitions. Results show the variation of magic wavelengths with the choice of orbital and spin angular momenta of the incident LG beam. Also, the tunability of the magic wavelengths is studied by using the focusing angle of the LG beam and its efficiency in the near-infrared region is observed. Evaluations of the wide spectrum of magic wavelengths from infrared to ultraviolet have substantial importance to experimentalists for carrying out high-precision measurements in fundamental physics. These magic wavelengths can be used to confine the atom or ion at the dark central node or at the high-intensity ring of the LG beam.