Zobrazeno 1 - 10
of 5 026
pro vyhledávání: '"Uhrig, A"'
Autor:
Pilch, Patrick, Amelin, Kirill, Schmiedinghoff, Gary, Reinold, Anneke, Zhu, Changqing, Povarov, Kirill Yu., Zvyagin, Sergei, Engelkamp, Hans, Lan, Yin-Ping, Shu, Guo-Jiun, Chou, Fang-Cheng, Nagel, Urmas, Rõõm, Toomas, Uhrig, Götz S., Fauseweh, Benedikt, Wang, Zhe
We report on terahertz spectroscopic measurements of quantum spin dynamics on single crystals of a spin-1/2 frustrated spin-ladder antiferromagnet BiCu$_2$PO$_6$ as a function of temperature, polarization, and applied external magnetic fields. Spin t
Externí odkaz:
http://arxiv.org/abs/2409.20103
Autor:
Sulaiman, Vanessa, Uhrig, Götz S.
Motivated by the generation by optical pulses of non-thermal distributions of nuclear spins in quantum dots we investigate the effect of optical pulses applied to Bardeen-Cooper-Schrieffer (BCS) superconductors. Using time-dependent mean-field theory
Externí odkaz:
http://arxiv.org/abs/2407.16350
Information can be stored magnetically in antiferromagnets ultrafast since their characteristic times are on the picosecond scale. Various spin torques have proven to be important for efficient and high-speed magnetic memories. So far, this has been
Externí odkaz:
http://arxiv.org/abs/2407.00472
Autor:
Uhrig, Götz S.
As of now, the phenomenological classical Landau-Lifshitz (LL) damping of magnetic order is not linked to the established quantum theory of dissipation based on the Lindbladian master equation. This is an unsatisfactory conceptual caveat for the boom
Externí odkaz:
http://arxiv.org/abs/2406.10613
Publikováno v:
Phys. Rev. B 110, 085115 (2024)
We apply continuous similarity transformations (CSTs) to study the zero-temperature breakdown of long-range ordered quantum antiferromagnets. The CST flow equations are truncated in momentum space by the scaling dimension so that all operators with s
Externí odkaz:
http://arxiv.org/abs/2405.13768
Autor:
Caci, Nils, Hering, Dag-Björn, Walther, Matthias R., Schmidt, Kai P., Wessel, Stefan, Uhrig, Götz S.
The quantitative description of long-range order remains a challenge in quantum many-body physics. We provide zero-temperature results from two complementary methods for the ground-state energy per site, the sublattice magnetization, the spin gap, an
Externí odkaz:
http://arxiv.org/abs/2405.08688
Autor:
Krauss, Patrick, Hösch, Jannik, Metzner, Claus, Maier, Andreas, Uhrig, Peter, Schilling, Achim
The ability to transmit and receive complex information via language is unique to humans and is the basis of traditions, culture and versatile social interactions. Through the disruptive introduction of transformer based large language models (LLMs)
Externí odkaz:
http://arxiv.org/abs/2405.02024
Autor:
Ghaleb, Esam, Burenko, Ilya, Rasenberg, Marlou, Pouw, Wim, Toni, Ivan, Uhrig, Peter, Wilson, Anna, Holler, Judith, Özyürek, Aslı, Fernández, Raquel
Gestures are inherent to human interaction and often complement speech in face-to-face communication, forming a multimodal communication system. An important task in gesture analysis is detecting a gesture's beginning and end. Research on automatic g
Externí odkaz:
http://arxiv.org/abs/2404.14952
Autor:
Althüser, Joshua, Uhrig, Götz S.
We investigate the superconducting (SC), charge-density wave (CDW), and antiferromagnetic (AFM) phases in the extended Hubbard model at zero temperature and half-filling. We employ the iterated equations of motion approach to compute the two-particle
Externí odkaz:
http://arxiv.org/abs/2403.18701
Publikováno v:
Solid State Nuclear Magnetic Resonance 132, 101936 (2024)
A recently developed dynamic mean-field theory for disordered spins (spinDMFT) is shown to capture the spin dynamics of nuclear spins very well. The key quantities are the spin autocorrelations. In order to compute the free induction decay (FID), pai
Externí odkaz:
http://arxiv.org/abs/2403.10465