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20032011
most citedGround-State Fidelity and Bipartite Entanglement in the Bose-Hubbard Model

223 citations

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Showing 2004Show all

17 papers · 1 filter

cond-mat.other2004★ 51 cited

A perturbative approach to J mixing in f-electron systems: Application to actinide dioxides

N. Magnani, P. Santini, G. Amoretti +1

We present a perturbative model for crystal-field calculations, which keeps into account the possible mixing of states labelled by different quantum number J. Analytical J-mixing r…

astro-ph2004★ 31 cited

Non-Gaussianity in braneworld and tachyon inflation

Gianluca Calcagni

We calculate the bispectrum of single-field braneworld inflation, triggered by either an ordinary scalar field or a cosmological tachyon, by means of a gradient expansion of large-…

gr-qc2004★ 45 cited

Patch dualities and remarks on nonstandard cosmologies

Gianluca Calcagni

In this paper we establish dualities between inflationary, cyclic/ekpyrotic, and phantom cosmologies within the patch formalism approximating high-energy effects in scenarios with…

cond-mat.stat-mech2004★ 17 cited

Analytical mean-field approach to the phase-diagram of ultracold bosons in optical superlattices

P. Buonsante, V. Penna, A. Vezzani

We report a multiple-site mean-field analysis of the zero-temperature phase diagram for ultracold bosons in realistic optical superlattices. The system of interacting bosons is des…

hep-th2004

Braneworld cosmology almost without branes

Gianluca Calcagni

We review some general aspects of braneworld cosmologies in which an inflationary period driven by a scalar field confined on the brane is described by a nonstandard effective Frie…

physics.comp-ph2004

BFKL, MM, Alpert-Rokhlin's transform, FFTW, ARPACK and all that

E. Onofri

The evolution equation for production introduced by Marchesini and Mueller posed some intriguing mathematical puzzles, both numerical and analytic. I give a detailed acc…