Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1998-09-29
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Latex file, 19 pages, discussion is extended and includes the global and local thermodynamic equilibrium in the presence of ev
Scientific paper
The problem of the energy-momentum conservation for matter in the gravitational field is discussed on the example of the effective gravity, which arises in superfluids. The "gravitational" field experienced by the relativistic-like massless quasiparticles which form the "matter" (phonons in superfluid 4He and low-energy fermions in superfluid 3He-A), is induced by the flow of the superfluid "vacuum". It appears that the energy-momentum conservation law for quasiparticles, has the covariant form T^{\mu}_{\nu;\mu}=0. "Pseudotensor" of the energy-momentum for the "gravitational field" (superfluid condensate) appears to depend on "matter". In the presence of the stationary "gravitational" (superfluid) field the real thermodynamic temperature T is constant in the true dissipationless equilibrium state with no entropy production, while the "relativistic" temperature T/\sqrt{g_{00}} is space dependent in agreement with Tolman's law. In the presence of the event horizon the true dissipationless equilibrium state does not exist. The quasiequilibrium dissipative motion across the horizon is considered. The inflationary stage of the expansion of the Universe can be modelled using the expanding Bose-condendsate.
No associations
LandOfFree
Energy-momentum tensor of quasiparticles in the effective gravity in superfluids does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Energy-momentum tensor of quasiparticles in the effective gravity in superfluids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energy-momentum tensor of quasiparticles in the effective gravity in superfluids will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-51549