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--- public:overview [2023/02/27 15:08] – 130.120.229.134
+++ public:overview [2024/07/18 15:16] (current) – tsaue
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 === Does chemistry need more physics ? ===
-[{{:public:period3.jpg?400 |The periodic table (1871)}}]The building blocks of chemistry are organized in the periodic table, which requires quantum mechanics for its understanding. In the 1980s it was realized that in order to correctly describe the heavy elements in the lower part of the periodic table, the special theory of relativity had to be invoked. The HAMP-vQED projet will investigate the possible role of quantum electrodynamics (QED) in chemistry. It will provide a protocol for highly accurate calculations of molecular properties, with particular attention to properties that probe the electron density in the close vicinity of atomic nuclei, where the QED-effects associated with the Lamb shift are created. The HAMP-vQED adheres to the general framework of quantum chemistry by seeking a variational (non-perturbative) approach using local (Gaussian) basis functions.
+[{{:public:period3.jpg?400 |The periodic table (1871)}}]The building blocks of chemistry are organized in the periodic table, which requires quantum mechanics for its understanding. In the 1980s it was realized that in order to correctly describe the heavy elements in the lower part of the periodic table, the special theory of relativity had to be invoked. The HAMP-vQED projet will investigate the possible role of quantum electrodynamics (QED) in chemistry. It will provide a protocol for highly accurate calculations of molecular properties, with particular attention to properties that probe the electron density in the close vicinity of atomic nuclei, where the QED-effects associated with the Lamb shift are created. The HAMP-vQED project adheres to the general framework of quantum chemistry by seeking a variational (non-perturbative) approach using local (Gaussian) basis functions.
 === Is the vacuum really empty ? ===
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   * **Vacuum polarization**: A charge in space is surrounded by virtual electron-positron pairs. This will contribute to the observed charge.
   * ** Electron self-energy**: A charge drags along its electromagnetic field. This will contribute to the observed mass.
-The splitting is a mere 4 meV, but for hydrogen-like uranium the splitting has grown to an impressive 468 eV.
+The splitting is a mere 4 μeV, but for hydrogen-like uranium the splitting has grown to an impressive 76 eV.
 It is therefore legitimate to ask if QED-effects could play a role in the chemistry of heavy elements.