Named after American physicist Willis Lamb (1913-2008). Lamb shift (plural Lamb shifts) (quantum mechanics, quantum electrodynamics) A small difference between the energy levels 2S ½ and 2P ½ of the hydrogen atom, not predicted by the Dirac equation, whose detection in the Lamb–Retherford experiment of 1947 foreshadowed the development of quantum electrodynamics (in. The Lamb Shift by Saturation Spectroscopy When you try to obtain very high resolution to examine small splittings in spectral lines, such as the hydrogen fine structure and the Lamb shift, those details are obscured by the sources of line broadening.In a low pressure gas, the main source of broadening is Doppler broadening from the thermal motion of the atoms or molecules of the gas. Lamb shift, fine structure and hyperfine structure in helium-like ions by fast-beam laser spectroscopy E.G. Thompson a, H.S. Margolis b,J.D.Silverb and M.R. Tarbutt b a Department of Physics, Florida State University, Tallahassee, FL 32306, USA b Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, UK.
Lamb shift in de Sitter spacetime
Abstract
We study the Lamb shift of both freely falling and static two-level atoms in interaction with quantized conformally coupled massless scalar fields in the de Sitter-invariant vacuum. We find that the Lamb shifts of both freely falling and static atoms are in structural similarity to that of an inertial atom immersed in a thermal bath in a Minkowski spacetime. For the freely falling atom, the Lamb shift gets a correction as if it was immersed in a thermal bath at the Gibbons-Hawking temperature, thus revealing clearly the intrinsic thermal nature of de Sitter spacetime. For the static atom, the Lamb shift is affected by a combination of the effect of the intrinsic thermal nature of de Sitter spacetime and the Unruh effect associated with the inherent acceleration of the atom.
Lamb Shift Accuracy
Lamb Shift Hydrogen
- 04.62.+v;
- 03.70.+k;
- 12.20.Ds;
- Quantum field theory in curved spacetime;
- Theory of quantized fields;
- Specific calculations;
- High Energy Physics - Theory;
- General Relativity and Quantum Cosmology
Lamb Shift
Lamb Shift Qed