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Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Quantum Condensates In Extreme Gravity: Implications For Cold Stars And Dark Matter [Post-Print], Mark P. Silverman
Quantum Condensates In Extreme Gravity: Implications For Cold Stars And Dark Matter [Post-Print], Mark P. Silverman
Faculty Scholarship
Stable end-point stars currently fall into two distinct classes — white dwarfs and neutron stars — differing enormously in central density and radial size. No stable cold dead stars are thought to span the intervening densities or have masses beyond ~2–3 solar masses. I show, however, that the general-relativistic condition of hydrostatic equilibrium augmented by the equation of state of a neutron condensate at 0 K generates stable sequences of cold stars that span the density gap and can have masses well beyond prevailing limits. The radial sizes and mass limit of each sequence are determined by the mass and …
Condensates In The Cosmos: Quantum Stabilization Of The Collapse Of Relativistic Degenerate Stars To Black Holes [Post-Print], Mark P. Silverman
Condensates In The Cosmos: Quantum Stabilization Of The Collapse Of Relativistic Degenerate Stars To Black Holes [Post-Print], Mark P. Silverman
Faculty Scholarship
According to prevailing theory, relativistic degenerate stars with masses beyond the Chandrasekhar and Oppenheimer–Volkoff (OV) limits cannot achieve hydrostatic equilibrium through either electron or neutron degeneracy pressure and must collapse to form stellar black holes. In such end states, all matter and energy within the Schwarzschild horizon descend into a central singularity. Avoidance of this fate is a hoped-for outcome of the quantization of gravity, an as-yet incomplete undertaking. Recent studies, however, suggest the possibility that known quantum processes may intervene to arrest complete collapse, thereby leading to equilibrium states of macroscopic size and finite density. I describe here one …
Fermion Condensation In A Relativistic Degenerate Star: Arrested Collapse And Macroscopic Equilibrium [Post-Print], Mark P. Silverman
Fermion Condensation In A Relativistic Degenerate Star: Arrested Collapse And Macroscopic Equilibrium [Post-Print], Mark P. Silverman
Faculty Scholarship
Fermionic Cooper pairing leading to the BCS-type hadronic superfluidity is believed to account for periodic variations ("glitches") and subsequent slow relaxation in spin rates of neutron stars. Under appropriate conditions, however, fermions can also form a Bose–Einstein condensate of composite bosons. Both types of behavior have recently been observed in tabletop experiments with ultra-cold fermionic atomic gases. Since the behavior is universal (i.e., independent of atomic potential) when the modulus of the scattering length greatly exceeds the separation between particles, one can expect analogous processes to occur within the supradense matter of neutron stars. In this paper, I show how …