Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Ralf Schützhold"'
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033074 (2022)
As a quantum analog of Cherenkov radiation, an inertial photon detector moving through a medium with constant refractive index n may perceive the electromagnetic quantum fluctuations as real photons if its velocity v exceeds the medium speed of light
Externí odkaz:
https://doaj.org/article/d07dab11d68f478ca6204b5f43eeb526
Publikováno v:
Physical Review Research, Vol 3, Iss 3, p 033153 (2021)
We study the enhancement of tunneling through a potential barrier V(x) by a time-dependent electric field with special emphasis on pulse-shaped vector potentials such as A_{x}(t)=A_{0}/cosh^{2}(ωt). In addition to the known effects of preacceleratio
Externí odkaz:
https://doaj.org/article/39721640758e484fb0ace93a8b0de8d4
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
Abstract We study the ground-state entanglement in the quantum Ising model with nearest neighbor ferromagnetic coupling J and find a sequential increase of entanglement depth d with growing J. This entanglement avalanche starts with two-point entangl
Externí odkaz:
https://doaj.org/article/86c96b25e60943fd91c3712534fd16a3
Autor:
Jens Sonntag, Annika Kurzmann, Martin Geller, Friedemann Queisser, Axel Lorke, Ralf Schützhold
Publikováno v:
New Journal of Physics, Vol 19, Iss 6, p 063028 (2017)
We study the optical response of a suspended, monolayer graphene field-effect transistor structure in magnetic fields of up to 9 T (quantum Hall regime). With an illumination power of only 3 μ W, we measure a photocurrent of up to 400 nA (without an
Externí odkaz:
https://doaj.org/article/ec0ff74cab6548548e7719b51f470390
Autor:
Christian Brand, Alfred Hucht, Giriraj Jnawali, Jonas D. Fortmann, Björn Sothmann, Hamid Mehdipour, Peter Kratzer, Ralf Schützhold, Michael Horn-von Hoegen
Publikováno v:
arXiv:2302.01715 [cond-mat.mes-hall]: https://arxiv.org/abs/2302.01715
Physical Review Letters 130(2023), 126203
Physical Review Letters 130(2023), 126203
The coupling energies between the buckled dimers of the Si(001) surface were determined through analysis of the anisotropic critical behavior of its order-disorder phase transition. Spot profiles in high-resolution low-energy electron diffraction as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08e1445f4d931e9796fdec2c07170e42
https://www.hzdr.de/publications/Publ-37064-2
https://www.hzdr.de/publications/Publ-37064-2
Publikováno v:
Physical Review Research 4(2022)3, 033074
arXiv:2108.10693 [quant-ph]: https://arxiv.org/abs/2108.10693
arXiv:2108.10693 [quant-ph]: https://arxiv.org/abs/2108.10693
As a quantum analog of Cherenkov radiation, an inertial photon detector moving through a medium with constant refractive index $n$ may perceive the electromagnetic quantum fluctuations as real photons if its velocity $v$ exceeds the medium speed of l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8df762f31e758454118a60f7eb0037d7
http://arxiv.org/abs/2108.10693
http://arxiv.org/abs/2108.10693
Autor:
Dennis Rätzel, Ralf Schützhold
Publikováno v:
arXiv:2101.05312: https://arxiv.org/abs/2101.05312
Physical Review A
Physical Review A 103(2021)6, 063321
Physical Review A
Physical Review A 103(2021)6, 063321
In view of the coherent properties of a large number of atoms, Bose-Einstein Condensates (BECs) have a high potential for sensing applications. Several proposals have been put forward to use collective excitations such as phonons in BECs for quantum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1beaa2b6d3a3cc813529213d52ba653e
http://arxiv.org/abs/2101.05312
http://arxiv.org/abs/2101.05312
Publikováno v:
arXiv:2107.08741 [hep-ph]: https://arxiv.org/abs/2107.08741
Physical Review Letters 129(2022)24, 241801
Physical Review Letters
Physical Review Letters 129(2022)24, 241801
Physical Review Letters
Via a combination of analytical and numerical methods, we study electron-positron pair creation by the electromagnetic field ${\bf A}(t,{\bf r})=[f(ct-x)+f(ct+x)]{\bf e}_y$ of two colliding laser pulses. Employing a generalized WKB approach, we find
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf7aa0d147a8dd8d2d414d7ac40c5e88
Publikováno v:
Physical Review Research 3(2021), 033153
We study the enhancement of tunneling through a potential barrier $V(x)$ by a time-dependent electric field with special emphasis on pulse-shaped vector potentials such as ${A}_{x}(t)={A}_{0}/{cosh}^{2}(\ensuremath{\omega}t)$. In addition to the know
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45d753f80948ffd056b1eb976985a9a2
https://www.hzdr.de/publications/Publ-33399-1
https://www.hzdr.de/publications/Publ-33399-1
Autor:
Naser Ahmadiniaz, Michael Bussmann, Alexander Debus, Thomas Kluge, Thomas E. Cowan, Ralf Schützhold
Publikováno v:
Physical Review D 104(2021), L011902
Physical Review
Physical Review
We consider the scattering of an x-ray free-electron laser (XFEL) beam on the superposition of a strong magnetic field Bext with the Coulomb field Eext of a nucleus with charge number Z. In contrast to Delbrück scattering (Coulomb field only), the m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbf6ee306ed9db11dbe52b3cb60f962d
https://www.hzdr.de/publications/Publ-32932-1
https://www.hzdr.de/publications/Publ-32932-1