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- Francesco Belletti, Maria Cotallo, +16 authors Jose Luis Velasco
- PARCO
- 2006

IANUS is a massively parallel system based on a 2D array of FPGA-based processors with nearest-neighbor connections. Processors are also directly connected to a central hub attached to a host… (More)

- F Belletti, Maria Cotallo, +18 authors David Yllanes
- Physical review letters
- 2008

We study numerically the nonequilibrium dynamics of the Ising spin glass, for a time spanning 11 orders of magnitude, thus approaching the experimentally relevant scale (i.e., seconds). We introduce… (More)

- Francesco Belletti, Maria Cotallo, +16 authors Jose Luis Velasco
- Computing in Science & Engineering
- 2009

Janus is a modular, massively parallel, and reconfigurable FPGA-based computing system. Each Janus module has one computational core and one host. Janus is tailored to, but not limited to, the needs… (More)

- Helkin Giovany Forero Ballesteros, Luis Antonio Fernández, V. Martı́n-Mayor, Antonio Muñoz Sudupe, G. Parisi, Juan Jesus Ruiz-Lorenzo
- 1998

where Si a is a spin operator. We use latin indices for lattice sites and greek ones for the spin components. Jab i j is an usually short-ranged coupling matrix. One can understand Eq. ~1! on the… (More)

- Francesco Belletti, Filippo Mantovani, +17 authors Juan Jesus Ruiz-Lorenzo
- Computing in Science & Engineering
- 2006

With Ianus, a next-generation field-programmable gate array (FPGA)-based machine, the authors hope to build a system that can fully exploit the performance potential of FPGA devices. A software… (More)

- Helkin Giovany Forero Ballesteros, Luis Antonio Fernández, V. Mart́ın-Mayor, Antonio Muñoz Sudupe
- 1995

We present the results of a Monte Carlo simulation of the RP 2 model in three dimensions with negative coupling. We observe a second order phase transition between the disordered phase and an… (More)

- Marco Baity-Jesi, Rachel A. Baños, +22 authors Janus Collaboration
- 2013

M. Baity-Jesi,1,2,3 R. A. Baños,3,4 A. Cruz,3,4 L. A. Fernandez,1,3 J. M. Gil-Narvion,3 A. Gordillo-Guerrero,3,5 D. Iñiguez,3,6 A. Maiorano,2,3 F. Mantovani,7 E. Marinari,8 V. Martin-Mayor,1,3 J.… (More)

Critical exponents and unusual properties of the broken phase in the 3 dRP 2 antiferromagnetic model

- Helkin Giovany Forero Ballesteros, Luis Antonio Fernández, V. Mart́ın-Mayor, Antonio Muñoz Sudupe, Depto
- 1996

AntiFerromagnetic (AF) models exhibit interesting characteristic properties. For instance, AF couplings on non-bipartite lattices, as the triangular Ising model, produce frustration. On bipartite… (More)

We have studied numerically the effect of quenched site dilution on a weak first-order phase transition in three dimensions. We have simulated the site diluted three-states Potts model studying in… (More)

- Marco Baity-Jesi, Rachel A. Baños, +22 authors David Yllanes
- FutureHPC@ICS
- 2012

We describe the past and future of the Janus project. The collaboration started in 2006 and deployed in early 2008 the Janus supercomputer, a facility that allowed to speed-up Monte Carlo Simulations… (More)