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258 papers · 1 filter
Minimal Inflation
Luis Alvarez-Gaume, Cesar Gomez, Raul Jimenez
Using the universal X superfield that measures in the UV the violation of conformal invariance we build up a model of multifield inflation. The underlying dynamics is the one contr…
Swinging Atwood's Machine: Experimental and Theoretical Studies
Olivier Pujol, José-Philippe Pérez, Jean-Pierre Ramis +3
A Swinging Atwood Machine (SAM) is built and some experimental results concerning its dynamic behaviour are presented. Experiments clearly show that pulleys play a role in the moti…
Apery and micro-invariants of a one dimensional Cohen-Macaulay local ring and invariants of its tangent cone
Teresa Cortadellas, Santiago Zarzuela
Given a one-dimensional Cohen-Macaulay local ring we compare several sets of invariants (micro-invariants, Apery invariants and invariants of the tangent cone) and give explicit fo…
The effect of kinematic constraints on multi-tension string network evolution
A. Avgoustidis, E. J. Copeland
We consider the evolution of a network of strings in an expanding universe, allowing for the formation of junctions between strings of different tensions. By explicitly including,…
Boundary quantum critical phenomena with entanglement renormalization
G. Evenbly, R. N. C. Pfeifer, V. Pico +4
We extend the formalism of entanglement renormalization to the study of boundary critical phenomena. The multi-scale entanglement renormalization ansatz (MERA), in its scale invari…
The axion shield
A. Andrianov, D. Espriu, F. Mescia +1
We investigate the propagation of a charged particle in a spatially constant, but time dependent, pseudoscalar background. Physically this pseudoscalar background could be provided…