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Autor:
K. Schönhammer
The nonzero ground-state energy of the quantum mechanical harmonic oscillator implies quantum fluctuations around the minimum of the potential with the mean square value proportional to Planck's constant. In classical mechanics thermal fluctuations o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::457a70e63e269bc5db99bb8d13014193
http://arxiv.org/abs/2008.11005
http://arxiv.org/abs/2008.11005
Autor:
K. Schönhammer
The broadening of one-dimensional Gaussian wave packets is presented in all textbooks on quantum mechanics. It is used to elucidate Heisenberg's uncertainty relation. The behaviour on a lattice is drastically different if the amplitude and/or phase o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7727f832edc884f14e298dcf7b986339
Autor:
Ortwin Renn, Wolfgang M. Heckl, Markus Aspelmeyer, Markus Arndt, Gunnar Berg, Martin B. Plenio, Susana F. Huelga, Jörg P. Kotthaus, Doris Schmitt-Landsiedel, Harald Weinfurter, Elisabeth Giacobino, Tilman Pfau, Peter Zoller, Ueli Maurer, Kedar S. Ranade, Alexey V. Ustinov, Wolfgang P. Schleich, Roland Wiesendanger, Bernhard Keimer, Christine Silberhorn, Tommaso Calarco, Christian Anton, Markus Grassl, Stefan Wolf, Fedor Jelezko, Manfred Bayer, Norbert Lütkenhaus, Peter Hänggi, K. Schönhammer, Harald Fuchs, Anton Zeilinger, Jörg Schiedmayer, Ernst M. Rasel, Philip Walther, Ingolf-Volker Hertel, Emo Welzl, Gerd Leuchs
Publikováno v:
Applied Physics B. 122
The term quantum physics refers to the phenomena and characteristics of atomic and subatomic systems which cannot be explained by classical physics. Quantum physics has had a long tradition in Germany, going back nearly 100 years. Quantum physics is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa2ee569216b1a832b19e4f0d6be92f5
https://doi.org/10.1007/s00340-016-6353-8
https://doi.org/10.1007/s00340-016-6353-8
Autor:
K. Schönhammer
Publikováno v:
International Journal of Quantum Chemistry. 12:517-527
Existing theoretical approaches to the description of hydrogen chemisorption on metal surfaces are reviewed. Results from cluster calculations are used to parameterize a model Hamiltonian. Calculations for the binding energy and the adsorbate spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d78719cee12a17fee5a19878e844fdf
https://doi.org/10.1002/qua.560120859
https://doi.org/10.1002/qua.560120859
Autor:
K. Schönhammer
Publikováno v:
Journal of Physics: Condensed Matter. 14:12783-12791
The theoretical description of interacting fermions in one spatial dimension is simplified by the fact that the low-energy spectrum of noninteracting fermions is identical to the one for a harmonic chain. This allows us to describe interacting fermio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35bb6529bda41b3c10ad6e0c61f355a8
https://doi.org/10.1088/0953-8984/14/48/317
https://doi.org/10.1088/0953-8984/14/48/317
Autor:
K. Schönhammer
Publikováno v:
physica status solidi (b). 234:398-401
A completely analytical discussion of the non-equilibrium energy distribution for a simple one-dimensional model of hot electron relaxation due to the emission of optical phonons is possible. The model, its exact solution, and the application to desc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a28fa8d2e1b186b4a4c7df18d833ccf
https://doi.org/10.1002/1521-3951(200211)234:1<398::aid-pssb398>3.0.co
https://doi.org/10.1002/1521-3951(200211)234:1<398::aid-pssb398>3.0.co
Publikováno v:
Progress of Theoretical Physics Supplement. 145:312-319
Using the Density Matrix Renormalization Group (DMRG) and various analytical techniques (functional renormalization) we consider the effects of local impurities in Luttinger liquids. We find that the universal physics predicted by bosonization sets i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf8908996384984e35577b70f7d6f4ff
https://doi.org/10.1143/ptps.145.312
https://doi.org/10.1143/ptps.145.312
Publikováno v:
Journal of Low Temperature Physics. 126:1147-1163
Using a fermionic renormalization group method we present a simple real space picture of the strong influence an impurity has on the electronic properties of a Luttinger liquid. We compute the flow of the renormalized impurity potential for a single
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d0537e5c73a35934022f540e84612af
https://doi.org/10.1023/a:1013823514926
https://doi.org/10.1023/a:1013823514926
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. :1-11
Photoemission line shapes can be used to extract important information about ground-state and low-energy properties. This is illustrated for the electron–phonon interaction in C 60 molecules, the occupancy and hybridization of the 4 f -level in Ce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::794ffae9427f41676da4263d9b93a715
https://doi.org/10.1016/s0368-2048(01)00241-9
https://doi.org/10.1016/s0368-2048(01)00241-9