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Timeline of the early universe

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Observations Of The Gas Reservoir Around A Star-Forming Galaxy In The Early Universe

Georges Meylan

We present a high signal-to-noise spectrum of a bright galaxy at z = 4.9 in 14 hr of integration on VLT FORS2. This galaxy is extremely bright, i(850) = 23.10 +/- 0.01, and is strongly lensed by the foreground massive galaxy cluster A1689 (z = 0.18). Stell ...

2008

Primordial magnetic fields

We discuss here the following questions related to magnetic fields in the early universe: 1. Observational constraints on primordial magnetic fields. 2. Different ideas put forward for explanation of large scale fields which can seed the galactic magnetic ...

2005

The performance of phase modulated heteronuclear dipolar decoupling schemes in fast magic-angle-spinning nuclear magnetic resonance experiments

David Lyndon Emsley

The experimental performance of the phase modulated decoupling schemes SDROOPY-1 and SPINAL64 is investigated for heteronuclear dipolar decoupling in solid-state magic-angle-spinning nuclear magnetic resonance (NMR), in comparison with existing decoupling ...

AMER INST PHYSICS2003

Comments on the holographic picture of the Randall-Sundrum model

Riccardo Rattazzi

We discuss some issues about the holographic interpretation of the compact Randall-Sundrum model, which is conjectured to be dual to a 4d field theory with non-linearly realized conformal symmetry. We make several checks of this conjecture. In particular, ...

2001

Supersymmetry, Finite-Temperature and Gravitino Production in the Early Universe

Riccardo Rattazzi

We reconsider post-inflation gravitino production, in the context of hidden sector supergravity models. We discuss the possible role of supersymmetry breaking from finite temperature effects in enhancing the rate for gravitino production and argue that the ...

1995

Sphalerons and baryogenesis

The author reviews recent studies of sphaleron-induced fermion-number violation at high temperatures and its relevance to the early Universe. ...

1993

Density Dependence of Electron-Hole Plasma Lifetime in Semiconductor Quantum-Wells

We report on an investigation of the electron-hole (e-h) plasma decay time tau(tot) versus e-h pair density in semiconductor quantum wells. We determine the density reached in a steady-state photoluminescence experiment from the optical spectra and compare ...

1992

High-resolution NMR in inhomogeneous magnetic fields

Geoffrey Bodenhausen

For high-resoln. 13C NMR spectroscopy under conditions of complete proton decoupling, gated decoupler and proton flip methods are described which demonstrate that heteronuclear J spectroscopy can provide fine structure information even in very inhomogeneou ...

1976