Zobrazeno 1 - 10
of 148
pro vyhledávání: '"Schlagheck, Peter"'
Out-of-time-ordered correlators (OTOCs), defined via the squared commutator of a time-evolving and a stationary operator, represent observables that provide useful indicators for chaos and the scrambling of information in complex quantum systems. Her
Externí odkaz:
http://arxiv.org/abs/2410.06064
Relaxation to equilibrium in Bose-Hubbard rings is numerically investigated in the time domain. We show that for small mean site populations in the Mott insulator regime, characterized by strong onsite interaction as compared to hopping, equipartitio
Externí odkaz:
http://arxiv.org/abs/2410.06039
A quantum control protocol is proposed for the creation of NOON states with $N$ ultracold bosonic atoms on two modes, corresponding to the coherent superposition $\vert N,0\rangle + \vert 0,N\rangle$. This state can be prepared by using a third mode
Externí odkaz:
http://arxiv.org/abs/2406.17545
Publikováno v:
Phys. Rev. E 108, 024216 (2023)
Fast scrambling of quantum correlations, reflected by the exponential growth of Out-of-Time-Order Correlators (OTOCs) on short pre-Ehrenfest time scales, is commonly considered as a major quantum signature of unstable dynamics in quantum systems with
Externí odkaz:
http://arxiv.org/abs/2303.14839
The notion of many-body quantum scars is associated with special eigenstates, usually concentrated in certain parts of Hilbert space, that give rise to robust persistent oscillations in a regime that globally exhibits thermalization. Here we extend t
Externí odkaz:
http://arxiv.org/abs/2212.12046
Autor:
Dupont, Nathan, Gabardos, Lucas, Arrouas, Floriane, Chatelain, Gabriel, Arnal, Maxime, Billy, Juliette, Schlagheck, Peter, Peaudecerf, Bruno, Guéry-Odelin, David
Parametric instabilities in interacting systems can lead to the appearance of new structures or patterns. In quantum gases, two-body interactions are responsible for a variety of instabilities that depend on the characteristics of both trapping and i
Externí odkaz:
http://arxiv.org/abs/2212.10890
Resurgent revivals in bosonic quantum gases: a striking signature of many-body quantum interferences
Matter wave revivals depend on a delicate interplay of constructive many-body quantum interferences in the developing dynamics of an ultracold bosonic system in an optical lattice. It is shown that the interplay between weak intersite tunneling and s
Externí odkaz:
http://arxiv.org/abs/2203.17130
Triple-NOON states are superpositions of the form $e^{i \varphi_1} |{N,0,0}\rangle + e^{i \varphi_2} |{0,N,0}\rangle + e^{i \varphi_3} |{0,0,N}\rangle$ involving $N$ bosonic quanta distributed over three modes. We theoretically show how such highly e
Externí odkaz:
http://arxiv.org/abs/2202.05589
Autor:
Hummel, Quirin, Schlagheck, Peter
Although highly successful, the Truncated Wigner Approximation (TWA) does not account for genuine many-body quantum interference between different solutions of the mean-field equations of a bosonic many-body (MB) system. This renders the TWA essentia
Externí odkaz:
http://arxiv.org/abs/2202.04596
Autor:
Chrétien, Renaud, Schlagheck, Peter
Publikováno v:
Phys. Rev. A 103, 033319 (2021)
We theoretically study the propagation of an interacting Bose-Einstein condensate in a two-dimensional disorder potential, following the principle of an atom laser. The constructive interference between time-reversed scattering paths gives rise to co
Externí odkaz:
http://arxiv.org/abs/2012.12117