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An introduction to rigorous formulations of quantum field theory
An introduction to rigorous formulations of quantum field theory

The Hydrogen atom.
The Hydrogen atom.

Using Density Matrices in a Compositional Distributional Model of
Using Density Matrices in a Compositional Distributional Model of

Projective Measurements
Projective Measurements

ON THE EQUATIONAL THEORY OF PROJECTION LATTICES OF
ON THE EQUATIONAL THEORY OF PROJECTION LATTICES OF

... version of Birkhoff’s Theorem, VC = HSPC where HC, SC, and PC denote the classes of all homomomorphic images, subalgebras, and direct products, resp., of members of C. Define N = V{L(Ck ) | k < ∞}. Clearly, L(Ck ) ∈ SHL(Cn ) for k ≤ n. Within the variety of MOLs, each ortholattice identity is equiva ...
Topological Order and the Kitaev Model
Topological Order and the Kitaev Model

A limit relation for quantum entropy, and channel capacity per unit cost
A limit relation for quantum entropy, and channel capacity per unit cost

... in the strong operator topology in B (H), since '(X ) = Tr  =  = = 1. Since the continuous functional calculus preserves the strong convergence (simply due to approximation by polynomials on a compact set), we obtain ...
here
here

... Ak j are the components of A in this basis, they may be written as entries in a matrix, with Ak j occupying the slot in the kth row and jth column. The vector that makes up the first column Ak1 is the ‘image’ of e1 (i.e. coefficients in the linear combination appearing in A|e1 i), the second column ...
14 The Postulates of Quantum mechanics
14 The Postulates of Quantum mechanics

AN INDEX THEORY FOR QUANTUM DYNAMICAL SEMIGROUPS 1
AN INDEX THEORY FOR QUANTUM DYNAMICAL SEMIGROUPS 1

Entanglement Witnesses
Entanglement Witnesses

Simple examples of second quantization 4
Simple examples of second quantization 4

L. Snobl: Representations of Lie algebras, Casimir operators and
L. Snobl: Representations of Lie algebras, Casimir operators and

... if we consider a given energy level, i.e. a subspace HE of the Hilbert space H consisting of all eigenvectors of Ĥ with the given energy E. Operators L̂j , K̂j can be all restricted to HE because they commute with Ĥ. When such restriction is understood, the Ĥ in equation (18) can be replaced by a ...
Geometry, Quantum integrability and Symmetric Functions
Geometry, Quantum integrability and Symmetric Functions

... 2.5. Localization and fixed points. The most important consequence of localization involves T -fixed points. We assume in what follows that X has isolated fixed points (so that they are in finite number), and denote their set X T . We first formulate the statement using only the F -vector space stru ...
Electronic Structure of Superheavy Atoms. Revisited.
Electronic Structure of Superheavy Atoms. Revisited.

Emergence of exponentially small reflected waves
Emergence of exponentially small reflected waves

Lectures on Random Schrödinger Operators
Lectures on Random Schrödinger Operators

Projective Measurements
Projective Measurements

The Quantum Mechanics of Angular Momentum
The Quantum Mechanics of Angular Momentum

... gradient operator of chapter 4, will result in a force in the direction of the gradient. This would not be so in a homogeneous field. The Bohr-Sommerfield theory of the atom at the time proposed quantized orbital angular momenta and the experiment was designed to test this hypothesis (not spin angul ...
Hydrogen Atom.
Hydrogen Atom.

... vector and the Laplace-Runge-Lenz vector. When the dynamical symmetry is broken, as in the case of the KleinGordon equation, the classical orbit is a precessing ellipse and the bound states with a given principle quantum number N are slightly split according to their orbital angular momentum values ...
Probab. Theory Related Fields 157 (2013), no. 1
Probab. Theory Related Fields 157 (2013), no. 1

... Let Mn be a Hermitian n × n Wigner matrix and (λi (Mn ))ni=1 the collection of its nondecreasing eigenvalues. Let ρSC stand for the density of the Wigner distribution and ui be the real where the distribution function of ρSC equals i/n. If n ≤ i ≤ (1 − )n for some  > 0 then the author proves unde ...
Document
Document

A Brief Review of Elementary Quantum Chemistry
A Brief Review of Elementary Quantum Chemistry

... Einstein tackled the problem of the photoelectric effect in 1905. Instead of assuming that the electronic oscillators had energies given by Planck’s formula (1), Einstein assumed that the radiation itself consisted of packets of energy E = hν, which are now called photons. Einstein successfully expl ...
Notes - Particle Theory
Notes - Particle Theory

Chapter 2 Foundations I: States and Ensembles
Chapter 2 Foundations I: States and Ensembles

... This completes the mathematical formulation of quantum mechanics. We immediately notice some curious features. One oddity is that the Schrödinger equation is linear, while we are accustomed to nonlinear dynamical equations in classical physics. This property seems to beg for an explanation. But far ...
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Compact operator on Hilbert space

In functional analysis, compact operators on Hilbert spaces are a direct extension of matrices: in the Hilbert spaces, they are precisely the closure of finite-rank operators in the uniform operator topology. As such, results from matrix theory can sometimes be extended to compact operators using similar arguments. In contrast, the study of general operators on infinite-dimensional spaces often requires a genuinely different approach.For example, the spectral theory of compact operators on Banach spaces takes a form that is very similar to the Jordan canonical form of matrices. In the context of Hilbert spaces, a square matrix is unitarily diagonalizable if and only if it is normal. A corresponding result holds for normal compact operators on Hilbert spaces. (More generally, the compactness assumption can be dropped. But, as stated above, the techniques used are less routine.)This article will discuss a few results for compact operators on Hilbert space, starting with general properties before considering subclasses of compact operators.
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