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# Articles

PP Avelino and AR Liddle

**Cosmic reionization constraints on the nature of cosmological perturbations**

Monthly Notices of the Royal Astronomical Society 371, 1755--1759 (2006)

PP Avelino, CJAP Martins, J Menezes, and C Santos

**Evolution of the fine-structure constant in the non-linear regime**

JCAP 12, 018 (2006)

PP Avelino, CJAP Martins, J Menezes, R Menezes, and JCRE Oliveira

**Frustrated expectations: Defect Networks and Dark Energy**

Phys.Rev. D 73 (123519) (2006)

PP Avelino, CJAP Martins, J Menezes, R Menezes, and JCRE Oliveira

**Defect Junctions and Domain Wall Dynamics**

Phys.Rev. D 73 (123520) (2006)

PP Avelino, CJAP Martins, NJ Nunes, and KA Olive

**Reconstructing the dark energy equation of state with varying couplings**

Phys.Rev. D 74, 083508 (2006)

G Caimi, A Perucchi, HR Ott, VM Pereira, AH Neto, AD Bianchi, Z Fisk, and L Degiorgi

**Magneto-optical evidence of double exchange in a percolating lattice**

Phys. Rev. Lett 96, 016403 (2006)

EV Castro and NMR Peres

**Site dilution of quantum spins in the honeycomb and square lattices**

Physica B 378-380, 137 (2006)

EV Castro, NMR Peres, KSD Beach, and AW Sandvik

**Site dilution of quantum spins in the honeycomb lattice**

Phys. Rev. B 73, 054422 (2006)

L Cornalba and MS Costa

**Unitarity in the presence of closed timelike curves**

Fortsch. Phys. 54, 351-356 (2006)

L Cornalba and MS Costa

**Unitarity in the presence of closed timelike curves**

Phys. Rev. D 74, 64024 (2006)

L Cornalba, MS Costa, J Penedones, and P Vieira

**From Fundamental Strings to Small Black Holes**

JHEP 12, 023 (2006)

L Costa and C Herdeiro

**A gravito-electromagnetic analogy based on tidal tensors**

preprint gr-qc/0612140 (2006)

A Ferreira, A Guerreiro, and V Vedral

**Macroscopic Entanglement due to Radiation Pressure**

Phys. Rev. Lett. 96, 060407 (2006)

P Figueras, CA Herdeiro, and F Paccetti Correia

**On a class of 4D Kahler bases and AdS(5) supersymmetric Black Holes**

JHEP 11, 036 (2006)

R Fonseca, D Barbosa, L Cupido, A Mourao, DM Santos, GF Smoot, and C Tello

**Site evaluation and RFI spectrum measurements in Portugal at the frequency range 0.408-10 GHz for a GEM polarized galactic radio emission experiment**

New Astronomy 11, 551-556 (2006)

CA Herdeiro and M Sampaio

**Casimir Energy and a cosmological bounce**

Class. Quant. Grav. 23, 473 (2006)

G Kakazei, YG Pogorelov, MD Costa, T Mewes, PE Wigen, PC Hammel, VO Golub, T Okuno, and V Novosad

**Origin of four-fold anisotropy in square lattice of circular ferromagnetic dots**

Phys. Rev. B 74 (6), 060406(R) (2006)

AML Lopes, JP Araujo, JJ Ramasco, E Rita, VS Amaral, JG Correia, R Suryanarayanan, and the ISOLDE Collaboration

**Percolative transition on ferromagnetic insulator manganites: Uncorrelated to correlated polaron clusters**

Phys. Rev. B 73, 100408(R) (2006)

C Martins and E Shellard

**Fractal properties and small-scale structure of cosmic string networks**

Phys. Rev. D 73, 043515 (2006)

J Menezes, PP Avelino, and C Santos

**Gravitational Effects of Varying Alpha Strings**

Int. Journ. of Mod. Phys. A 21, 3295-3306 (2006)

F Paccetti Correia, M G Schmidt, and Z Tavartkiladze

**4D superfield reduction of 5D orbifold SUGRA and heterotic M-theory**

Nucl.Phys. B 751, 222 (2006)

F Paccetti Correia, MG Schmidt, and Z Tavartkiladze

**Gauge and modulus inflation from 5D orbifold SUGRA**

Nucl.Phys.B 739, 156 (2006)

VM Pereira, F Guinea, JMB Lopes dos Santos, NMR Peres, and AH Castro Neto

**Disorder Induced Localized States in Graphene**

Phys. Rev. Lett. 96, 036801 (2006)

J Ventura, J Teixeira, YG Pogorelov, JB Sousa, R Ferreira, and PP Freitas

**Spin-dependent two-level resistance fluctuations in underoxidized tunnel junctions**

J. Appl. Phys. 99, 08T301 (2006)

J Viana Lopes, MD Costa, JMB Lopes dos Santos, and R Toral

**Optimized multicanonical simulations: a new proposal based on classical fluctuation theory**

Phys. Rev. E 74 (4), 046702 (2006)