منابع مشابه
Scattering Theory for Open Quantum Systems
Quantum systems which interact with their environment are often modeled by maximal dissipative operators or so-called Pseudo-Hamiltonians. In this paper the scattering theory for such open systems is considered. First it is assumed that a single maximal dissipative operator AD in a Hilbert space H is used to describe an open quantum system. In this case the minimal self-adjoint dilation e K of ...
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تخمین دقیق مشخصات کانال در سیستم های مخابراتی یک امر مهم محسوب می گردد. این امر به ویژه در کانال های بیسیم با خاصیت فرکانس گزینی و زمان گزینی شدید، چالش بزرگی است. مقالات متعدد پر از روش های مبتکرانه ای برای طراحی و آنالیز الگوریتم های تخمین کانال است که بیشتر آنها از روش های خاصی استفاده می کنند که یا دارای عملکرد خوب با پیچیدگی محاسباتی بالا هستند و یا با عملکرد نه چندان خوب پیچیدگی پایینی...
A Generalized Sturm Theory for Indefinite Elliptic Systems
Sturm results on oscillation and comparison for solutions of a second-order differential equation have a topological nature in their own. Roughly speaking they describe the rotation of a straight line in the phase plane of the equation. Many generalization of this results were obtained; among the others we recall the symplectic version due to Arnol’d in [2] for second order hamiltonian systems ...
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This work reviews recent advances in the analytical treatment of the continuum spectrum of correlated few-body non-relativistic Coulomb systems. The exactly solvable two-body problem serves as an introduction to the non-separable three-particle system. For the latter case we discuss the existence of an approximate separability of the long and the short-range dynamics which is exposed in an appr...
متن کاملScattering theory for N � particle systems in constant magnetic
We study scattering theory for systems of N particles in a constant magnetic eld under the assumption that the system has no neutral subsystems. We prove the Mourre estimate using the generator of dilations along the direction of the eld as the conjugate operator, and asymptotic completeness of wave operators for short-range interactions.
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ژورنال
عنوان ژورنال: Journal of the Mathematical Society of Japan
سال: 1976
ISSN: 0025-5645
DOI: 10.2969/jmsj/02810071