Zobrazeno 1 - 10
of 154
pro vyhledávání: '"Haake, Fritz"'
Autor:
Sieberer, Lukas M., Olsacher, Tobias, Elben, Andreas, Heyl, Markus, Hauke, Philipp, Haake, Fritz, Zoller, Peter
Publikováno v:
npj Quantum Information 5, 78 (2019)
This work aims at giving Trotter errors in digital quantum simulation (DQS) of collective spin systems an interpretation in terms of quantum chaos of the kicked top. In particular, for DQS of such systems, regular dynamics of the kicked top ensures c
Externí odkaz:
http://arxiv.org/abs/1812.05876
We review the construction of the supersymmetric sigma model for unitary maps, using the color- flavor transformation. We then illustrate applications by three case studies in quantum chaos. In two of these cases, general Floquet maps and quantum gra
Externí odkaz:
http://arxiv.org/abs/1412.5336
Autor:
Braun, Petr, Haake, Fritz
The spectral form factor as well as the two-point correlator of the density of (quasi-)energy levels of individual quantum dynamics are not self-averaging. Only suitable smoothing turns them into useful characteristics of spectra. We present numerica
Externí odkaz:
http://arxiv.org/abs/1410.5299
Autor:
Altland, Alexander, Haake, Fritz
Publikováno v:
New J. Phys 14, 73011 (2012)
We discuss the unitary quantum dynamics of the Dicke model (spin and oscillator coupled). A suitable quasiprobabilty representing the quantum state turns out to obey a Fokker-Planck equation, with drift terms representing the underlying classical Ham
Externí odkaz:
http://arxiv.org/abs/1201.6514
Autor:
Altland, Alexander, Haake, Fritz
Publikováno v:
Phys. Rev. Lett. 108, 073601 (2012)
We demonstrate effective equilibration for unitary quantum dynamics under conditions of classical chaos. Focusing on the paradigmatic example of the Dicke model, we show how a constructive description of the thermalization process is facilitated by t
Externí odkaz:
http://arxiv.org/abs/1110.1270
Autor:
Braun, Petr, Haake, Fritz
We resolve a long-standing riddle in quantum chaos, posed by certain fully chaotic billiards with constant negative curvature whose periodic orbits are highly degenerate in length. Depending on the boundary conditions for the quantum wave functions,
Externí odkaz:
http://arxiv.org/abs/1001.3339
Autor:
Altland, Alexander, Braun, Petr, Haake, Fritz, Heusler, Stefan, Knieper, Gerhard, Müller, Sebastian
Publikováno v:
Path Integrals - New Trends and Perspectives: Proc 9th Int Conf (Dresden), eds W Janke and A Pelster (Singapore: World Scientific), p 40 (2008)
Long periodic orbits of hyperbolic dynamics do not exist as independent individuals but rather come in closely packed bunches. Under weak resolution a bunch looks like a single orbit in configuration space, but close inspection reveals topological or
Externí odkaz:
http://arxiv.org/abs/0906.4930
Publikováno v:
New J. Phys. 11, 103025 (2009)
Using Gutzwiller's semiclassical periodic-orbit theory we demonstrate universal behaviour of the two-point correlator of the density of levels for quantum systems whose classical limit is fully chaotic. We go beyond previous work in establishing the
Externí odkaz:
http://arxiv.org/abs/0906.1960