نتایج جستجو برای: discrete quantum semigroup

تعداد نتایج: 454424  

Journal: :journal of nanostructures 2012
z. ahangari m. fathipour

a comprehensive study of schottky barrier mosfet (sbmosfet) scaling issue is performed to determine the role of wafer orientation and structural parameters on the performance of this device within non-equilibrium green's function formalism. quantum confinement increases the effective schottky barrier height (sbh). (100) orientation provides lower effective schottky barrier height in comparison ...

2009
JULIO C. GARCÍA ROBERTO QUEZADA

We study the structure of the set of diagonal invariant states, their attraction domains and characterize all the subharmonic projection for the asymmetric exclusion quantum Markov semigroup introduced in [9]

M. Fathipour Z. Ahangari,

A comprehensive study of Schottky barrier MOSFET (SBMOSFET) scaling issue is performed to determine the role of wafer orientation and structural parameters on the performance of this device within Non-equilibrium Green's Function formalism. Quantum confinement increases the effective Schottky barrier height (SBH). (100) orientation provides lower effective Schottky barrier height in compa...

2003
L. Pandolfi H. Zwart

We present an estimate for a class of unbounded perturbations of the generator of an exponentially stable semigroup. When this estimate is satisfied then the perturbed operator still generates an exponentially stable semigroup. For generators of holomorhic semigroups the class of allowed perturbations contains unbounded operators of the form HA”. with (Y < 4. The estimate is given in terms of t...

1997
William Arveson WILLIAM ARVESON

A numerical index is introduced for semigroups of completely positive maps of B(H) which generalizes the index of E0-semigroups. It is shown that the index of a unital completely positive semigroup agrees with the index of its dilation to an E0-semigroup, provided that the dilation is minimal. Introduction. We introduce a numerical index for semigroups P = {Pt : t ≥ 0} of normal completely posi...

Journal: :Proceedings of the Edinburgh Mathematical Society 1994

2008
Anilesh Mohari

In this paper we consider a completely positive map τ = (τ t , t ≥ 0) with a faithful normal invariant state φ on a type-II 1 factor A 0 and propose an index theory. We achieve this via a more general Kolmogorov's type of construction for stationary Markov processes which naturally associate a nested isomorphic von-Neumann algebras. In particular this construction generalizes well known Jones c...

2008
SVETLANA DIMITROVA OLEG GUTIK

We study algebraic and topological properties of topological semigroups containing a copy of the bicyclic semigroup C(p, q). We prove that each topological semigroup S with pseudocompact square contains no dense copy of C(p, q). On the other hand, we construct a consistent example of a Tychonov countably compact semigroup containing a copy of C(p, q). In this paper we study the structural prope...

Journal: :Open Syst. Inform. Dynam. 2004
Andrzej Jamiolkowski

In this paper, we discuss the minimal number η of observablesQ1, . . . , Qη, where expectation values at some time instants t1, . . . , tr determine the trajectory of a d-level quantum system (“qudit”) governed by the Gaussian semigroup

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