Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Jamiołkowski, Andrzej"'
A one-parameter family of hermiticity-preserving superoperators is a time-dependent family $\{\Phi_{t}\colon\mathbb{M}_{n}(\mathbb{C})\rightarrow\mathbb{M}_{n}(\mathbb{C})\}_{t\in\mathbb{R}}$ of hermiticity-preserving superoperators determined, in a
Externí odkaz:
http://arxiv.org/abs/2411.11035
We give an algorithm determining whether a hermiticity-preserving superoperator is positive. In our approach we apply techniques of quantifier elimination theory for real numbers. Furthermore, we argue that quantifier elimination theory should play m
Externí odkaz:
http://arxiv.org/abs/2003.09081
Assume that $\Phi:\mathbb{M}_{n}(\mathbb{C})\rightarrow\mathbb{M}_{n}(\mathbb{C})$ is a superoperator which preserves hermiticity. We give an algorithm determining whether $\Phi$ preserves semipositivity (we call $\Phi$ positive in this case). Our ap
Externí odkaz:
http://arxiv.org/abs/2003.07772
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Journal of Mathematical Physics 59, 102204 (2018)
Completely positive maps are useful in modeling the discrete evolution of quantum systems. Spectral properties of operators associated with such maps are relevant for determining the asymptotic dynamics of quantum systems subjected to multiple intera
Externí odkaz:
http://arxiv.org/abs/1711.02354
Publikováno v:
Open Syst. Inf. Dyn. 23, 1650019 (2016)
In this article we propose a dynamic quantum tomography model for open quantum systems with evolution given by phase-damping channels. Mathematically, these channels correspond to completely positive trace-preserving maps defined by the Hadamard prod
Externí odkaz:
http://arxiv.org/abs/1509.09318
Assume that $A_{1},...,A_{s}$ are complex $n\times n$ matrices. We give a computable criterion for existence of a common eigenvector of $A_{i}$ which generalize the result of D. Shemesh established for two matrices. We use this criterion to prove som
Externí odkaz:
http://arxiv.org/abs/1306.0083
Autor:
Jamiołkowski, Andrzej
Publikováno v:
Open Sys. Information Dyn. 11, 63-70 (2004)
In this paper, we discuss the minimal number of observables, where expectation values at some time instant determine the trajectory of a d-level quantum system ("qudit") governed by the Gaussian semigroup. We assume that the macroscopic information a
Externí odkaz:
http://arxiv.org/abs/quant-ph/0408171
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.