Zobrazeno 1 - 10
of 227
pro vyhledávání: '"Jentschura Ulrich"'
Publikováno v:
Phys. Rev. A 110, 032816 (2024)
For an accurate theoretical description of muonic bound systems, it is crucial to consistently treat relativistic and recoil corrections to vacuum polarization. The one-loop vacuum-polarization effect is by far the dominant quantum electrodynamic (QE
Externí odkaz:
http://arxiv.org/abs/2409.17068
Autor:
Giorgini, Ludovico T., Jentschura, Ulrich D., Malatesta, Enrico M., Rizzo, Tommaso, Zinn-Justin, Jean
Publikováno v:
Phys.Rev.D 110 (2024) 036003
We discuss numerical aspects of instantons in two- and three-dimensional $\phi^4$ theories with an internal $O(N)$ symmetry group, the so-called $N$-vector model. Combining asymptotic transseries expansions for large argument with convergence acceler
Externí odkaz:
http://arxiv.org/abs/2405.18191
Autor:
Jentschura, Ulrich D.
Publikováno v:
Phys.Rev.A 110 (2024) 012808
The calculation of higher-order binding corrections to bound systems is a fundamental problem of theoretical physics. For any nonrelativistic expansion, one needs the Foldy-Wouthuysen Transformation which disentangles the particle and the antiparticl
Externí odkaz:
http://arxiv.org/abs/2405.18714
Autor:
Jentschura, Ulrich D., Yost, Dylan C.
Publikováno v:
Phys.Rev.A 108 (2023) 062822
The so-called proton radius puzzle (the current discrepancy of proton radii determined from spectroscopic measurements in ordinary versus muonic hydrogen) could be addressed via an accurate measurement of the Rydberg constant, because the proton radi
Externí odkaz:
http://arxiv.org/abs/2310.00507
Autor:
Jentschura, Ulrich D.
Publikováno v:
Phys.Rev.A 109 (2024) 012802
We revisit the derivation of multipole contributions to the atom-wall interaction previously presented in [G. Lach et al., Phys. Rev. A 81, 052507 (2010)]. A careful reconsideration of the angular-momentum decomposition of the second-, third- and fou
Externí odkaz:
http://arxiv.org/abs/2308.04656
Publikováno v:
Phys.Rev.D (2023) 036004
We analyze the leading and higher-order quantum electrodynamic corrections to the energy levels for a single electron bound in a Penning trap, including the Bethe logarithm correction due to virtual excitations of the reference quantum cyclotron stat
Externí odkaz:
http://arxiv.org/abs/2307.15993
Autor:
Jentschura, Ulrich D.
Publikováno v:
Phys.Rev.D 108 (2023) 016016
We use an algebraic approach to the calculation of Landau levels for a uniform magnetic field in the symmetric gauge with a vector potential A = (1/2) (B x r), where B is assumed to be constant. The magnetron quantum number constitutes the degeneracy
Externí odkaz:
http://arxiv.org/abs/2306.01155
Autor:
Jentschura, Ulrich D.
Publikováno v:
J.Phys.Conf.Ser. 2391 (2022) 012017
The proton radius puzzle is known as the discrepancy of the proton radius, obtained from muonic hydrogen spectroscopy (obtained as being roughly equal to 0.84fm), and the proton radius obtained from (ordinary) hydrogen spectroscopy where a number of
Externí odkaz:
http://arxiv.org/abs/2304.06126
Publikováno v:
Open Physics, Vol 10, Iss 4, Pp 763-767 (2012)
Externí odkaz:
https://doaj.org/article/3e3d618816824e87a30b2c3e505048a4
Autor:
Jentschura Ulrich
Publikováno v:
Open Physics, Vol 10, Iss 4, Pp 749-762 (2012)
Externí odkaz:
https://doaj.org/article/b29dce4e374c4a0aa53eef3b68477c2d