Energy shift due to anisotropic black body radiation

Abstract

In many applications a source of the black-body radiation (BBR) can be highly anisotropic. This leads to the BBR shift that depends on tensor polarizability and on the projection of the total angular momentum of ions and atoms in a trap. We derived formula for the anisotropic BBR shift and performed numerical calculations of this effect for Ca${}^{+}$ and Yb${}^{+}$ transitions of experimental interest. These ions used for a design of high-precision atomic clocks, fundamental physics tests such as search for the Lorentz invariance violation and space-time variation of the fundamental constants, and quantum information. Anisotropic BBR shift may be one of the major systematic effect in these experiments.

1) A consideration of the case when a certain portion of photons is emitted to the solid angle Omega1 at the temperature T1 and another portion of photons is emitted to the solid angle Omega2 at the temperature T2 is added. 2) The journal reference is added. 6 pages, 1 figure

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Cited by in corpus (4)

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• Estimation of BBR shift due to Stark effect for the Microwave ${}^{113}$Cd${}^{+}$ Ion Clock
• A magneto-optical trap with millimeter ball lenses