CO OZNACZA SŁOWO LAMB SHIFT
Lamb shift
W fizyce zmiana Lambsa, nazwana Willis Lamb, jest małą różnicą energii między dwoma poziomami energii 2S1 / 2 i 2P1 / 2 atomu wodoru w elektrodynamice kwantowej. Zgodnie z równaniem Diraca, orbitale 2S1 / 2 i 2P1 / 2 powinny mieć tę samą energię. Jednakże oddziaływanie między elektronem a próżnią powoduje niewielką zmianę energii, która jest różna dla stanów 2S1 / 2 i 2P1 / 2. Lamb i Robert Retherford mierzą tę zmianę w 1947 roku, a ten pomiar dostarczył bodźca do teorii renormalizacji, aby poradzić sobie z rozbieżnościami. Był zwiastunem współczesnej elektrodynamiki kwantowej opracowanej przez Juliana Schwingera, Richarda Feynmana, Ernsta Stueckelberga i Sin-Itiro Tomonagi. Lamb otrzymał nagrodę Nobla w dziedzinie fizyki w 1955 roku za odkrycia związane z przesunięciem Lamb.
Definicja słowa Lamb shift w słowniku
Definicja przesunięcia Lamb w słowniku to mała różnica energii pomiędzy dwoma stanami atomu wodoru wykrytego przez Willisa Eugene'a Lamb'a, amerykańskiego fizyka.
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1
Collected Papers of Carl Wieman
Actually they differ by the ground-state Lamb shift plus small, well-measured QED
and fine-structure corrections to the excited-state energies. Thus an accurate
comparison of the two intervals allows one to determine the IS Lamb shift.
2
The Hydrogen Atom: Precision Physics of Simple Atomic Systems
Lamb Shift in Light Hydrogen-Like Atoms Vladimir G. Ivanov1⋆ and Savely G.
Karshenboim2,3⋆⋆ 1 Pulkovo Observatory, St. Petersburg, Russia 2 D. I.
Mendeleev Institute for Metrology, St. Petersburg, Russia 3 Max-Planck-Institut f
̈ur ...
Savely G. Karshenboim,
2001
3
Unification of Classical, Quantum, and Relativistic ...
3.4 Lamb Shift Lamb shift yields in essence an observational evidence of a
polarizable dielectric vacuum. Lamb shift is the energy difference between two
energy levels of the same principle quantum number and the same total angular
...
J. X. Zheng-Johansson, P.-I. Johansson,
2006
4
Theory of Light Hydrogenic Bound States
The linear combination of the 1S,2S and 8D5 Lamb shifts obtained in 2 this
manner admits direct comparison with the Lamb shift theory without any further
complications. However, to make a comparison between the re- sults of different
...
Michael I. Eides, Howard Grotch, Valery A. Shelyuto,
2007
5
Quantum Field Theory II: Quantum Electrodynamics: A Bridge ...
17.5.4 The Lamb Shift On April 26, 1947, Lamb and Retherford experimentally
discovered some fine structure in the spectrum of the hydrogen atom, which is
called the Lamb shift nowadays; they used microwave technique.7 This
spectacular ...
6
Precision Physics of Simple Atomic Systems
From this experiment we deduce for the ground state of H-like uranium a Lamb
Shift value of ... test of QED in the high-Z regime, i.e. aiming at a measurement of
the Is-Lamb-Shift in H-like uranium with an accuracy of 1 eV or even better.
Savely G. Karshenboim, Valery B. Smirnov,
2003
The experimenters' obsession with hydrogen stems from the fact that quantitative
work on its spectrum forms the foundation of empirical determinations of the
Rydberg and fine-structure constants, and the magnitude of the Lamb shift. These
...
8
Topics in Atomic Physics
Because of this nonuniformity of the electric field, the tidal force on this shaking
electron is greatest when the electron is near the nucleus so that s-states (which
have nonzero probability of being found atr = 0) suffer the greatest Lamb shift.
Charles E. Burkhardt, Jacob J. Leventhal,
2006
9
Atomic Physics with Heavy Ions
One major task of bound state QED is to provide accurate predictions of
spectroscopic data, e.g. for the Lamb shift in few-electron systems, which can be
compared with high-precision measurements. Historically, the experimental
observation ...
Heinrich Beyer, Viatcheslav P. Shevelko,
1999
10
Oxford English Dictionary Additions Series
(Lamb shift: formerly a main entry.) [The name of Willis E. Lamb (b. 1913), U.S.
physicist.] Used attrib. to designate phenomena described, predicted, or
demonstrated by Lamb, as Lamb dip, a drop in the output from a laser
spectrometer at a ...
J. A. Simpson, Michael Proffitt, E. S. C. Weiner,
1997
WIADOMOŚCI, KTÓRE ZAWIERAJĄ SŁOWO «LAMB SHIFT»
Sprawdź, o czym dyskutuje się w prasie krajowej i zagranicznej oraz jak jest stosowane słowo
Lamb shift w wiadomościach.
GOP donor Charles Munger Jr. finds wealth buys few friends
"My thesis topic was The Lamb Shift in Heliumlike Uranium," he said by email. Munger settled in Palo Alto, where he and his wife, attorney ... «Los Angeles Times, Kwi 15»
The Vacuum Catastrophe - Zero-Point Energy
The presence of zero-point fluctuations has been verified experimentally with very accurate measurements of the Lamb Shift, other atomic ... «ZPEnergy, Lut 15»
Jovion Corporation - Zero-Point Energy
Casimir-Lamb Shift - Our research indicates that certain electron orbitals in atoms are lower in energy inside a Casimir cavity than outside. «ZPEnergy, Lip 14»
Feynman diagrams and the fly in the ointment
It also affects the way in which the spin and orbital angular momentum behave and this can be used to explain the Lamb shift. These tiny effects ... «OUPblog, Cze 14»
Neutrons Knock at the Cosmic Door
This approach is completely analogous to the measurement of the Lamb shift of the hydrogen atom, which is a verification of the quantization of ... «Physics, Kwi 14»
Surprises in physics: From black bodies to the accelerating universe
1947 - Willis Lamb: The Lamb Shift - The Lamb Shift was one of those subtle experimental measurements that lay the foundation for a whole ... «Scientific American, Lut 14»
The puzzle of the proton radius
This difference, between the lowest and higher atomic states, is known as the “Lamb Shift,” after William Lamb, the physicist who discovered the ... «World Socialist Web Site, Lut 14»
History: Shut up and calculate!
One of the first to hear about the Lamb shift was physicist Julian Schwinger, who before the war had been a rising star in quantum theory. «Nature.com, Sty 14»
Proton radius puzzle may be solved by quantum gravity
In these experiments, the proton radius value was measured in terms of an energy difference between two energy levels, called the Lamb shift. «Phys.Org, Lis 13»
Physicists Tackle the Shrinking Proton Puzzle
... Nobel Prize in 1955 for his work. Here's the late Hans Bethe talking about the Lamb shift: ... In other words, they're measuring the Lamb shift. «Scientific American, Kwi 13»