Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Micklitz, Tobias"'
Autor:
Micklitz, Tobias, Altland, Alexander
Light propagation in random media is notorious for its resilience to (Anderson) wave localization. We here argue that in materials with slow helicity relaxation previously unnoticed principles of topology reinforce delocalization. We show that the ef
Externí odkaz:
http://arxiv.org/abs/2405.13277
The evolution of complex correlated quantum systems such as random circuit networks is governed by the dynamical buildup of both entanglement and entropy. We here introduce a real-time field theory approach -- essentially a fusion of the $G \Sigma$-f
Externí odkaz:
http://arxiv.org/abs/2404.10919
Autor:
Altland, Alexander, Kim, Kun Woo, Micklitz, Tobias, Rezaei, Maedeh, Sonner, Julian, Verbaarschot, Jacobus J. M.
In recent years, the physics of many-body quantum chaotic systems close to their ground states has come under intensified scrutiny. Such studies are motivated by the emergence of model systems exhibiting chaotic fluctuations throughout the entire spe
Externí odkaz:
http://arxiv.org/abs/2403.13516
Autor:
Barkhofen, Sonja, De, Syamsundar, Sperling, Jan, Silberhorn, Christine, Altland, Alexander, Bagrets, Dmitry, Kim, Kun Woo, Micklitz, Tobias
We report on the observation of quantum criticality forming at the transition point between topological Anderson insulator phases in a one-dimensional photonic quantum walk with spin. The walker's probability distribution reveals a time-staggered pro
Externí odkaz:
http://arxiv.org/abs/2301.05428
Publikováno v:
J. Phys. A: Math. Theor. 56 175301 (2023)
We study two-state discrimination in chaotic quantum systems. Assuming that one of two $N$-qubit pure states has been randomly selected, the probability to correctly identify the selected state from an optimally chosen experiment involving a subset o
Externí odkaz:
http://arxiv.org/abs/2210.03213
Publikováno v:
Phys. Rev. Lett. 129, 140402 (2022)
Fermi's Golden Rule (FGR) applies in the limit where an initial quantum state is weakly coupled to a {\it continuum} of other final states overlapping its energy. Here we investigate what happens away from this limit, where the set of final states is
Externí odkaz:
http://arxiv.org/abs/2206.00704
Publikováno v:
Annals of Physics 447, 168978 (2022)
We study mesoscopic fluctuations in the supercurrent of a Josephson junction consisting of a topological insulator microbridge between two conventional superconductors. In the model, we account for the strong proximity effect when superconductors ind
Externí odkaz:
http://arxiv.org/abs/2205.02272
We propose an approach to the realization of many-body quantum state distributions inspired by combined principles of thermodynamics and mesoscopic physics. Its essence is a maximum entropy principle conditioned by conservation laws. We go beyond tra
Externí odkaz:
http://arxiv.org/abs/2203.12580
Publikováno v:
Physical Review X 13, 011003 (Published 10 January 2023)
We propose dynamical protocols allowing for the engineered realization of topological surface states in isolation. Our approach builds on the concept of synthetic dimensions generated by driving systems with incommensurate frequencies. As a concrete
Externí odkaz:
http://arxiv.org/abs/2203.01727
Autor:
Bagrets, Dmitry, Kim, Kun Woo, Barkhofen, Sonja, De, Syamsundar, Sperling, Jan, Silberhorn, Christine, Altland, Alexander, Micklitz, Tobias
Publikováno v:
Phys. Rev. Research 3, 023183 (2021)
We consider one-dimensional quantum walks in optical linear networks with synthetically introduced disorder and tunable system parameters allowing for the engineered realization of distinct topological phases. The option to directly monitor the walke
Externí odkaz:
http://arxiv.org/abs/2102.01176