Zobrazeno 1 - 10
of 198
pro vyhledávání: '"Bäcker, Arnd"'
Chaotic transport in Hamiltonian systems is often restricted due to the presence of partial barriers, leading to a limited flux between different regions in phase space. Typically, the most restrictive partial barrier in a 2D symplectic map is based
Externí odkaz:
https://tud.qucosa.de/id/qucosa%3A93072
https://tud.qucosa.de/api/qucosa%3A93072/attachment/ATT-0/
https://tud.qucosa.de/api/qucosa%3A93072/attachment/ATT-0/
While the notion of quantum chaos is tied to random matrix spectral correlations, also eigenstate properties in chaotic systems are often assumed to be described by random matrix theory. Analytic insights into eigenstate correlations can be obtained
Externí odkaz:
http://arxiv.org/abs/2407.19929
It is commonly expected that for quantum chaotic many body systems the statistical properties approach those of random matrices when increasing the system size. We demonstrate for various kicked spin-$1/2$ chain models that the average eigenstate ent
Externí odkaz:
http://arxiv.org/abs/2405.07545
Partial transport barriers in the chaotic sea of Hamiltonian systems influence classical transport, as they allow for a small flux between chaotic phase-space regions only. We establish for higher-dimensional systems that quantum transport through su
Externí odkaz:
http://arxiv.org/abs/2308.01162
Publikováno v:
Phys. Rev. Lett. 131, 187201 (2023)
We demonstrate that quantum dynamical localization in the Arnold web of higher-dimensional Hamiltonian systems is destroyed by an intrinsic classical drift. Thus quantum wave packets and eigenstates may explore more of the intricate Arnold web than p
Externí odkaz:
http://arxiv.org/abs/2307.06717
Publikováno v:
Phys. Rev. E 108, 044213 (2023)
Quantum many-body systems are commonly considered as quantum chaotic if their spectral statistics, such as the level spacing distribution, agree with those of random matrix theory. Using the example of the kicked Ising chain we demonstrate that even
Externí odkaz:
http://arxiv.org/abs/2306.09034
Autor:
Kieler, Maximilian F. I., Bäcker, Arnd
A bipartite spin system is proposed for which a fast transfer from one defined state into another exists. For sufficient coupling between the spins, this implements a bit-flipping mechanism which is much faster than that induced by tunneling. The sta
Externí odkaz:
http://arxiv.org/abs/2303.16171
Chaotic transport in Hamiltonian systems is often restricted due to the presence of partial barriers, leading to a limited flux between different regions in phase phase. Typically, the most restrictive partial barrier in a 2D symplectic map is based
Externí odkaz:
http://arxiv.org/abs/2210.09863
Autor:
Pulikkottil, Jethin J., Lakshminarayan, Arul, Srivastava, Shashi C. L., Kieler, Maximilian F. I., Bäcker, Arnd, Tomsovic, Steven
Publikováno v:
Phys. Rev. E 107, 024124 (2023)
A bipartite system whose subsystems are fully quantum chaotic and coupled by a perturbative interaction with a tunable strength is a paradigmatic model for investigating how isolated quantum systems relax towards an equilibrium. It is found that quan
Externí odkaz:
http://arxiv.org/abs/2204.07561
Publikováno v:
Phys. Rev. Lett. 129, 193901 (2022)
We conjecture that chaotic resonance modes in scattering systems are a product of a conditionally invariant measure from classical dynamics and universal exponentially distributed fluctuations. The multifractal structure of the first factor depends s
Externí odkaz:
http://arxiv.org/abs/2203.09752