Zobrazeno 1 - 10
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pro vyhledávání: '"Mata, I."'
Publikováno v:
Phys. Rev. Research 3, 022023 (2021)
Quantum multifractality is a fundamental property of systems such as non-interacting disordered systems at an Anderson transition and many-body systems in Hilbert space. Here we discuss the origin of the presence or absence of a fundamental symmetry
Externí odkaz:
http://arxiv.org/abs/2103.03068
Publikováno v:
Phys. Rev. Research 2, 012020 (2020)
We present a full description of the nonergodic properties of wavefunctions on random graphs without boundary in the localized and critical regimes of the Anderson transition. We find that they are characterized by two critical localization lengths:
Externí odkaz:
http://arxiv.org/abs/1904.08869
Akademický článek
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Publikováno v:
Phys. Rev. E 92, 032914 (2015)
We present a comprehensive study of the destruction of quantum multifractality in the presence of perturbations. We study diverse representative models displaying multifractality, including a pseudointegrable system, the Anderson model and a random m
Externí odkaz:
http://arxiv.org/abs/1506.05720
Publikováno v:
Phys. Rev. E 91, 036901 (2015)
In [PRE \textbf{90}, 022920 (2014), arXiv:1404.6738] a study of the ground state fidelity of the Dicke model as a function of the coupling parameter is presented. Abrupt jumps of the fidelity in the superradiant phase are observed and are assumed to
Externí odkaz:
http://arxiv.org/abs/1410.6848
Publikováno v:
Phys. Rev. Lett. 112, 234101 (2014)
We expose two scenarios for the breakdown of quantum multifractality under the effect of perturbations. In the first scenario, multifractality survives below a certain scale of the quantum fluctuations. In the other one, the fluctuations of the wave
Externí odkaz:
http://arxiv.org/abs/1402.1658
Publikováno v:
J. Phys. A: Math. Theor. 47 (2014) 115301
In this work we study the non-Markovian behaviour of a qubit coupled to an environment in which the corresponding classical dynamics change from integrable to chaotic. We show that in the transition region, where the dynamics has both regular islands
Externí odkaz:
http://arxiv.org/abs/1306.5980
Publikováno v:
Physical Review E 86, 056215 (2012)
We study a version of the mathematical Ruijsenaars-Schneider model, and reinterpret it physically in order to describe the spreading with time of quantum wave packets in a system where multifractality can be tuned by varying a parameter. We compare d
Externí odkaz:
http://arxiv.org/abs/1207.1675
Publikováno v:
Phys. Rev. A 86, 022114 (2012)
We study the influence of a chaotic environment in the evolution of an open quantum system. We show that there is an inverse relation between chaos and non-Markovianity. In particular, we remark on the deep relation of the short time non-Markovian be
Externí odkaz:
http://arxiv.org/abs/1204.3614
Publikováno v:
Europhys. Lett. 89 50009 (2010)
The Loschmidt echo and the purity are two quantities that can provide invaluable information about the evolution of a quantum system. While the Loschmidt echo characterizes instability and sensitivity to perturbations, purity measures the loss of coh
Externí odkaz:
http://arxiv.org/abs/0908.2134