Zobrazeno 1 - 10
of 1 948
pro vyhledávání: '"finite quantum systems"'
Publikováno v:
Phys. Rev. Lett. 133, 026404 (2024)
The piecewise linearity condition on the total energy with respect to the total magnetization of finite quantum systems is derived, using the infinite-separation-limit technique. This generalizes the well-known constancy condition, related to static
Externí odkaz:
http://arxiv.org/abs/2307.16003
Autor:
Lei, C., Vourdas, A.
Publikováno v:
Europhysics Letters 140, 45001 (2022)
Uncertainty relations $\Delta(\rho)\ge \eta_d$ in terms of the Gini index are studied. The `Gini uncertainty constant' $\eta_d$ is estimated numerically and compared to an upper bound $\tilde \eta_d\ge \eta_d$. It is shown that for large $d$ we get $
Externí odkaz:
http://arxiv.org/abs/2212.12755
Akademický článek
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Using the adiabatic perturbation theory of driven dynamics [Phys. Rev. A 78, 052508 (2008)] we design a hierarchy of quantum state preparation protocols that systematically increase the fidelity at very long driving times. We test these and other pro
Externí odkaz:
http://arxiv.org/abs/2210.07027
Autor:
Vourdas, A.
Publikováno v:
Europhysics Letters 130, 20003 (2020)
Lorenz values and the Gini index are popular quantities in Mathematical Economics, and are used here in the context of quantum systems with finite-dimensional Hilbert space. They quantify the uncertainty in the probability distribution related to an
Externí odkaz:
http://arxiv.org/abs/2007.06564
Publikováno v:
J. Stat. Mech. (2020) 083110
The entanglement evolution after a quantum quench became one of the tools to distinguish integrable versus chaotic (non-integrable) quantum many-body dynamics. Following this line of thoughts, here we propose that the revivals in the entanglement ent
Externí odkaz:
http://arxiv.org/abs/2004.08706
Publikováno v:
Phys. Rev. E 102, 012145 (2020)
Although entropy is a necessary and sufficient quantity to characterize the order of work content for equal energetic (EE) states in the asymptotic limit, for the finite quantum systems, the relation is not so linear and requires detail investigation
Externí odkaz:
http://arxiv.org/abs/1912.09780
Autor:
Stránský, Pavel, Cejnar, Pavel
Publikováno v:
Phys. Rev. E 100, 042119 (2019)
We study the effect of superradiance in open quantum systems, i.e., the separation of short- and long-living eigenstates when a certain subspace of states in the Hilbert space acquires an increasing decay width. We use several Hamiltonian forms of th
Externí odkaz:
http://arxiv.org/abs/1907.11576
In a recent publication, we have discussed the effects of boundary conditions in finite quantum systems and their connection with symmetries. Focusing on the one-dimensional Hubbard Hamiltonian under twisted boundary conditions, we have shown that pr
Externí odkaz:
http://arxiv.org/abs/1803.01443