منابع مشابه
Ultracold gases far from equilibrium
Ultracold atomic quantum gases belong to the most exciting challenges of modern physics. Their theoretical description has drawn much from (semi-) classical field equations. These mean-field approximations are in general reliable for dilute gases in which the atoms collide only rarely with each other, and for situations where the gas is not too far from thermal equilibrium. With present-day tec...
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We have studied several nonquilibnum lattice gases with paniclexonsening dynamics. The lattice consists of two planes, and particles interact (mad) only with nearest-neighbour particles within the same plane but may hop to the other. In addition to the standard heat bath at temperalure T, a mechaoism exists that biases a principal axis, namely. we assume either that particles are also driven by...
متن کاملUltracold atomic quantum gases far from equilibrium
We calculate the time evolution of a far-from-equilibrium initial state of a non-relativistic ultracold Bose gas in one spatial dimension. The non-perturbative approximation scheme is based on a systematic expansion of the two-particle irreducible effective action in powers of the inverse number of field components. This yields dynamic equations which contain direct scattering, memory and off-s...
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We consider an isolated system of N immiscible fluids, each following a stiffened-gas equation of state. We consider the problem of calculating equilibrium states from the conserved fluid-mechanical properties, i.e., the partial densities and internal energies. We consider two cases; in each case mechanical equilibrium is assumed, but the fluids may or may not be in thermal equilibrium. For bot...
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ژورنال
عنوان ژورنال: Nature
سال: 1875
ISSN: 0028-0836,1476-4687
DOI: 10.1038/012067a0