DECLARATION I, the undersigned, hereby declare that the work contained in this thesis is my own original work and that I have not previously in its entirety or in part submitted it at any university… (More)

What are the information processing capabilities of physical systems? As recently as the first half of the 20 th century this question did not even have a definite meaning. What is information, and… (More)

We propose a matrix model to describe a class of fractional quantum Hall (FQH) states for a system of (N1 + N2) electrons with filling factor more general than in the Laughlin case. Our model, which… (More)

For a specific exactly solvable 2 × 2 matrix model with a PT-symmetric Hamiltonian possessing a real spectrum, we construct all the eligible physical metrics Θ > 0 and show that none of them admits a… (More)

With a toppling rule which generates metastable sites, we explore the properties of a gradient-driven sandpile that is minimally perturbed at one boundary. In two dimensions we find that the… (More)

We show that Wegner's flow equations, as recently discussed in the Lipkin model, can be solved self-consistently. This leads to a nonlinear differential equation which fully determines the order… (More)

We demonstrate that exact supersymmetry can emerge in a purely fermionic system. This “supersymmetry without bosons” is unveiled by constructing a novel boson-fermion Dyson mapping from a fermion… (More)

The second virial coefficient B 2 (T ) for non-interacting particles moving in a twodimensional noncommutative space and in the presence of a uniform magnetic field ~ B is presented. The… (More)

Strandpieper (Anthus spinoletta littoralis) im Binnenland. Am 20.2. 1955 ent-. entdeckte ida bei einem Beohadatungsgang am Rheinufer unmittelbar unterhalb Ingelheim-Nord ( = Frei Weinheim) am… (More)