Search Results - "Jentschura, Ulrich"

Dispersion of Ultrarelativistic Tardyonic and Tachyonic Wave Packets on Cosmic Scales by Nicasio, José, Jentschura, Ulrich D.

“…We investigate the time propagation of tachyonic (superluminal) and tardyonic (subluminal, ordinary) massive wave packets on cosmic scales. A normalizable wave…”
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Quantum Electrodynamics of Dicke States: Resonant One-Photon Exchange Energy and Entangled Decay Rate by Jentschura, Ulrich D., Adhikari, Chandra M.

“…We calculate the fully retarded one-photon exchange interaction potential between electrically neutral, identical atoms, one of which is assumed to be in an…”
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Precision measurement of the hydrogen-deuterium 1S-2S isotope shift by Parthey, Christian G, Matveev, Arthur, Alnis, Janis, Pohl, Randolf, Udem, Thomas, Jentschura, Ulrich D, Kolachevsky, Nikolai, Hänsch, Theodor W

“…Measuring the hydrogen-deuterium isotope shift via two-photon spectroscopy of the 1S-2S transition, we obtain 670,994,334,606(15) Hz. This is a 10-times…”
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Triple Compton effect: a photon splitting into three upon collision with a free electron by Lötstedt, Erik, Jentschura, Ulrich D

“…The process in which a photon splits into three after the collision with a free electron (triple Compton effect) is the most basic process for the generation…”
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Long-Range Interactions for Hydrogen Atoms in Excited D States by Adhikari, Chandra M., Jentschura, Ulrich D.

“…Pressure shifts inside an atomic beam are among the more theoretically challenging effects in high-precision measurements of atomic transitions. A crucial…”
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Nonperturbative treatment of double compton backscattering in intense laser fields by Lötstedt, Erik, Jentschura, Ulrich D

“…The emission of a pair of entangled photons by an electron in an intense laser field can be described by two-photon transitions of laser-dressed, relativistic…”
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Multi-instantons and exact results IV: Path integral formalism by Jentschura, Ulrich D., Zinn-Justin, Jean

“…► O(N) anharmonic oscillators are considered in the path integral formalism. ► Higher-order corrections to instantons are obtained using Feynman diagram…”
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Multi-instantons and exact results III: Unification of even and odd anharmonic oscillators by Jentschura, Ulrich D., Surzhykov, Andrey, Zinn-Justin, Jean

“…This is the third article in a series of three papers on the resonance energy levels of anharmonic oscillators. Whereas the first two papers mainly dealt with…”
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From Dirac theories in curved space-times to a variation of Dirac's large-number hypothesis by Jentschura, Ulrich D.

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Tachyonic field theory and neutrino mass running by Jentschura Ulrich

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Lepton Pair Čerenkov Radiation Emitted by Tachyonic Neutrinos: Lorentz-Covariant Approach and IceCube Data by Jentschura, Ulrich D., Ehrlich, Robert

“…Current experiments do not exclude the possibility that one or more neutrinos are very slightly superluminal or that they have a very small tachyonic mass…”
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Long-Range Interactions for Hydrogen: 6P–1S and 6P–2S Systems by Jentschura, Ulrich, Adhikari, Chandra

“…The collisional shift of a transition constitutes an important systematic effect in high-precision spectroscopy. Accurate values for van der Waals interaction…”
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Antimatter Free-Fall Experiments and Charge Asymmetry by Jentschura, Ulrich David

“…We propose a method by which one could use modified antimatter gravity experiments in order to perform a high-precision test of antimatter charge neutrality…”
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Squeezing the Parameter Space for Lorentz Violation in the Neutrino Sector with Additional Decay Channels by Jentschura, Ulrich D.

“…The hypothesis of Lorentz violation in the neutrino sector has intrigued scientists for the last two to three decades. A number of theoretical arguments…”
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Neutrino Pair Cerenkov Radiation for Tachyonic Neutrinos by Jentschura, Ulrich D., Nándori, István

“…The emission of a charged light lepton pair by a superluminal neutrino has been identified as a major factor in the energy loss of highly energetic neutrinos…”
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Magic Wavelengths for 1S–nS and 2S–nS Transitions in Hydrogenlike Systems by Adhikari, Chandra M., Canales, Jonathan C., Arthanayaka, Thusitha P. W., Jentschura, Ulrich D.

“…We study the magic wavelength for two-photon 1S–nS transitions in a hydrogen and deuterium atom, as well as 2S–nS transitions, where the lower level is the…”
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Evaluation of laser-assisted bremsstrahlung with Dirac-Volkov propagators by Lötstedt, Erik, Jentschura, Ulrich D, Keitel, Christoph H

“…We study spontaneous bremsstrahlung emission in a highly intense laser field. In this regime the interaction with the laser field has to be treated…”
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Laser channeling of Bethe-Heitler pairs by Lötstedt, Erik, Jentschura, Ulrich D, Keitel, Christoph H

“…Electron-positron pair creation is analyzed for an arrangement involving three external fields: a high-frequency gamma photon, the Coulomb field of a nucleus,…”
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Antimatter Gravity: Second Quantization and Lagrangian Formalism by Jentschura, Ulrich D.

“…The application of the CPT (charge-conjugation, parity, and time reversal) theorem to an apple falling on Earth leads to the description of an anti-apple…”
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Two-loop Bethe-logarithm correction in hydrogenlike atoms by Pachucki, Krzysztof, Jentschura, Ulrich D

“…We calculate the two-loop Bethe logarithm correction to atomic energy levels in hydrogenlike systems. The two-loop Bethe logarithm is a low-energy quantum…”
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