Did the Big Bang boil?

Article Abstract:

Phase transitions on a grand scale might have taken place in the early Universe, both enriching and complicating Big Bang cosmology. Quasi-free quarks and gluons, which act as the mediator particles of the strong force, are the baryons and mesons of the 21st century's normal 'hadronic' matter. The most dramatic consequences of Big Bang cosmology come by way of first-order phase transitions, which involve discontinuous changes in the organization of matter.

United Kingdom, Phase transformations (Statistical physics), Phase transitions (Physics), Big bang theory, Particle physics

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Repulsively bound atom pairs in an optical lattice

Article Abstract:

The observation of an exotic bound state comprising a pair of ultracold rubidium atoms in an optical lattice is reported. The strong correspondence between the optical lattice physics of ultracold bosonic atoms and the Bose-Hubbard model is illustrated by the results showing a link that is important for future applications of these systems to the study of correlated condensed matter and to quantum information.

Austria, Lattice dynamics, Condensed matter, Optical properties, Structure, Rubidium, Hamiltonian function, Bosons

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