Zobrazeno 1 - 10
of 309
pro vyhledávání: '"Mathey, L"'
Autor:
Nuske, M., Mathey, L.
Publikováno v:
Physical Review B 104, 224305 (2021)
We determine the Hall conductivity of light-driven graphene, with specific focus on its frequency dependence, and compare it to the static effective approximation, based on Floquet states. This approximation gives the Haldane model as the effective m
Externí odkaz:
http://arxiv.org/abs/2110.05469
Autor:
Zahn, H. P., Singh, V. P., Kosch, M. N., Asteria, L., Freystatzky, L., Sengstock, K., Mathey, L., Weitenberg, C.
Publikováno v:
Phys. Rev. X 12, 021014 (2022)
Driving a many-body system out of equilibrium induces phenomena such as the emergence and decay of transient states, which can manifest itself as pattern and domain formation. The understanding of these phenomena expands the scope of established ther
Externí odkaz:
http://arxiv.org/abs/2108.11917
Publikováno v:
Phys. Rev. Lett. 126, 200402 (2021)
A Bose-Einstein condensate (BEC) of rubidium atoms is prepared in one of two degenerate energy minima in the second Bloch band of an optical square lattice. A subsequent oscillation of the BEC between the two energy minima is observed, which is drive
Externí odkaz:
http://arxiv.org/abs/2008.05471
Autor:
Nuske, M., Broers, L., Schulte, B., Jotzu, G., Sato, S. A., Cavalleri, A., Rubio, A., McIver, J. W., Mathey, L.
Publikováno v:
Phys. Rev. Research 2, 043408 (2020)
We demonstrate how the properties of light-induced electronic Floquet states in solids impact natural physical observables, such as transport properties, by capturing the environmental influence on the electrons. We include the environment as dissipa
Externí odkaz:
http://arxiv.org/abs/2005.10824
Publikováno v:
Phys. Rev. Research 2, 043210 (2020)
The phenomenon of metastability can shape dynamical processes on all temporal and spatial scales. Here, we induce metastable dynamics by pumping ultracold bosonic atoms from the lowest band of an optical lattice to an excitation band, via a sudden qu
Externí odkaz:
http://arxiv.org/abs/2004.00620
Autor:
Sato, S. A., McIver, J. W., Nuske, M., Tang, P., Jotzu, G., Schulte, B., Hübener, H., De Giovannini, U., Mathey, L., Sentef, M. A., Cavalleri, A., Rubio, A.
Publikováno v:
Phys. Rev. B 99, 214302 (2019)
We employ a quantum Liouville equation with relaxation to model the recently observed anomalous Hall effect in graphene irradiated by an ultrafast pulse of circularly polarized light. In the weak-field regime, we demonstrate that the Hall effect orig
Externí odkaz:
http://arxiv.org/abs/1905.04508
Publikováno v:
Phys. Rev. A 100, 013602 (2019)
We propose a generalization of the Feynman path integral using squeezed coherent states. We apply this approach to the dynamics of Bose-Einstein condensates, which gives an effective low energy description that contains both a coherent field and a sq
Externí odkaz:
http://arxiv.org/abs/1807.07214
Publikováno v:
Phys. Rev. A 96, 043624 (2017)
Supersymmetric systems derive their properties from conserved supercharges which form a supersymmetric algebra. These systems naturally factorize into two subsystems, which, when considered as individual systems, have essentially the same eigenenergi
Externí odkaz:
http://arxiv.org/abs/1703.02863
We develop a Magnus formalism for periodically driven systems which provides an expansion both in the driving term and the inverse driving frequency, applicable to isolated and dissipative systems. We derive explicit formulas for a driving term with
Externí odkaz:
http://arxiv.org/abs/1604.01010
Publikováno v:
Physical Review A 94, 023607 (2016)
We determine the exact dynamics of an initial Bardeen-Cooper-Schrieffer (BCS) state of ultra-cold atoms in a deep hexagonal optical lattice. The dynamical evolution is triggered by a quench of the lattice potential, such that the interaction strength
Externí odkaz:
http://arxiv.org/abs/1602.00979