Concept

Groupe de renormalisation

Publications associées (198)

Three-sublattice order in the SU(3) Heisenberg model on the square and triangular lattice

We present a numerical study of the SU(3) Heisenberg model of three-flavor fermions on the triangular and square lattice by means of the density-matrix renormalization group and infinite projected entangled-pair states. For the triangular lattice we confir ...

2012

Toward a microscopic description of flow near the jamming threshold

Matthieu Wyart

We study the relationship between microscopic structure and viscosity in non-Brownian suspensions. We argue that the formation and opening of contacts between particles in flow effectively leads to a negative selection of the contacts carrying weak forces. ...

EDP Sciences2012

Optimizing long-range order, band gap, and group velocities for graphene on close-packed metal surfaces

Harald Brune, Stefano Rusponi, Donat Fabian Natterer

We compare different growth methods with the aim of optimizing the long-range order of a graphene layer grown on Ru(0001). Combining chemical vapor deposition with carbon loading and segregation of the surface layer leads to autocorrelation lengths of 240 ...

2012

Hydroperiod regime controls the organization of plant species in wetlands

Andrea Rinaldo

With urban, agricultural, and industrial needs growing throughout the past decades, wetland ecosystems have experienced profound changes. Most critically, the biodiversity of wetlands is intimately linked to its hydrologic dynamics, which in turn are being ...

Natl Acad Sciences2012

Unravelling cross-recurrence: coupling across timescales

Patrick Jermann, Marc-Antoine Nüssli

We present an extension of cross-recurrence analysis for dual gaze analysis which is suited for complex situations where for instance the objects of interest are not all visible at all times or when stimulus exploration is not homogeneous. The typicical si ...

2012

Structure-Correlation Principles Connecting Ground State Properties and Reaction Barrier Heights for the Cope Rearrangement of Semibullvalenes

Matthew Wodrich, Daniel Filipe Dos Santos Alves Jana

A direct relationship exists between the properties of substituted semibullvalenes and their Cope rearrangement activation barrier. This unique correlation not only enables the determination of kinetic data from ground state information, but also provides ...

American Chemical Society2012

Automation of one-loop QCD computations

Valentin Hirschi

We present the complete automation of the computation of one-loop QCD corrections, including UV renormalization, to an arbitrary scattering process in the Standard Model. This is achieved by embedding the OPP integrand reduction technique, as implemented i ...

2011

The quantum mechanics of perfect fluids

Riccardo Rattazzi, Solomon G Shamsuddin Osman Endlich

We consider the canonical quantization of an ordinary fluid. The resulting long-distance effective field theory is derivatively coupled, and therefore strongly coupled in the UV. The system however exhibits a number of peculiarities, associated with the vo ...

2011

mu SR investigation of magnetism and magnetoelectric coupling in Cu2OSeO3

Henrik Moodysson Rønnow, Helmuth Berger

A detailed zero-and transverse-field muon spin rotation investigation of magnetism and the magnetoelectric coupling in Cu2OSeO3 is reported. An internal magnetic field B-int(T = 0) = 85.37(25) mT was found, in agreement with a ferrimagnetic state below T-c ...

2011

Critical Percolation: the Expected Number of Clusters in a Rectangle

Clément Hongler, Stanislav Smirnov

We show that for critical site percolation on the triangular lattice two new observables have conformally invariant scaling limits. In par- ticular the expected number of clusters separating two pairs of points converges to an explicit conformal invariant. ...

Springer Verlag2011

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