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Hyperbolic spin vortices and textures in exciton-polariton condensates

Publications associées (112)

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Order-disorder phase transition and stress-induced diffusion in Au-Cu

Daniele Mari, Robert Schaller, John Hennig

Isothermal mechanical spectroscopy by means of a forced torsion pendulum (measuring internal friction/mechanical loss) was used to study the interplay of long-range atomic order and stress-induced diffusion (Zener relaxation) in Au57%Cu43%. Our results sho ...

2009

Chirality and Z2 vortices in a Heisenberg spin model on the kagome lattice

The phase diagram of the classical J1–J2 model on the kagome lattice is investigated by using extensive Monte Carlo simulations. In a realistic range of parameters, this model has a low-temperature chiral-ordered phase without long-range spin order. We sho ...

2008

Results of the first phase of the d-Rank project

Martin Rajman, Martin Veselý

In the present report we describe the research work that has been carried out in the scope of the first 2 year phase of the d-Rank project. ...

2008

Phase Separation and Flux Quantization in the Doped Quantum Dimer Model on Square and Triangular Lattices

Frédéric Mila

The doped two-dimensional quantum dimer model is investigated by numerical techniques on the square and triangular lattices, with significantly different results. On the square lattice, at small enough doping, there is always a phase separation between an ...

2007

Bose-Einstein condensation of exciton polaritons

Benoît Marie Joseph Deveaud, Vincenzo Savona, Stefan Kundermann

Phase transitions to quantum condensed phases - such as Bose - Einstein condensation (BEC), superfluidity, and superconductivity - have long fascinated scientists, as they bring pure quantum effects to a macroscopic scale. BEC has, for example, famously be ...

2006

High-field spin dynamics of antiferromagnetic quantum spin chains

Henrik Moodysson Rønnow, Mechthild Enderle

The characteristic internal order of macroscopic quantum ground states in one-dimensional spin systems is usually not directly accessible, but reflected in the spin dynamics and the field dependence of the magnetic excitations. In high magnetic fields quan ...

2000

Phase separation and the segregation principle in the infinite-U spinless Falicov-Kimball model

Nicolas Macris

The simplest statistical-mechanical model of crystalline formation (or alloy formation) that includes electronic degrees of freedom is solved exactly in the limit of large spatial dimensions and infinite interaction strength. The solutions contain both sec ...

1999

Modeling using the Visible Human Dataset

Daniel Thalmann, Jean Fasel

Modeling with medical images in this context provides both structural and topological information of different elements. In addition to displaying these elements, the interest is in using them for physically based deformation simulation, motion generation ...

1996

Magnetic Phase-Diagram Of Mnsi

The magnetic phase diagram of MnSi was studied using small angle neutron scattering. The results were analysed using the three-dimensional resolution function and the scattering cross section to model the diffraction data. A small phase pocket (phase 'A') ...

1995

Model-based matching and hinting of fonts

Roger Hersch

In digital computers, phototypesetters and printers, typographic fonts are mainly given by their outline descriptions. Outline descriptions alone do not provide any information about character parts like stems, serifs, shoulders, and bowls. But, in order t ...

1991