First-principles point-defect calculations for solid neutron star matter

Nature of fault planes in solid neutron star matter

The properties of tectonic earthquake sources are compared with those deduced here for fault planes in solid neutron-star matter. The conclusion that neutron-star matter cannot exhibit brittle fracture at any temperature or magnetic field strength is significant for current theories of pulsar glitches, and of the anomalous X-ray pulsars and soft-gamma repeaters. Subject headings: stars:neutron ...

Mechanics of defect transport in tungsten from first-principles calculations

p, li {white-space: prewrap;} Tungsten (W) is an important material for high temperature applications due to its refractory nature. However, like all transition metals from the VI-A group, W suffers from low-temperature brittleness and lack of ductility, which severely limits its use as a structural material. Tungsten’s mechanical properties can be enhanced by alloying with elements with d-elec...

Kaon Zero-Point Fluctuations in Neutron Star Matter

We investigate the contribution of zero-point motion, arising from uctuations in kaon modes, to the ground state properties of neutron star matter containing a Bose condensate of kaons. The zero-point energy is derived via the thermodynamic partition function, by integrating out uctuations for an arbitrary value of the condensate eld. It is shown that the vacuum counterterms of the chiral Lagra...

First Principles Calculations

Calculations of the linestrengths and transition frequencies of the forbidden pure rotational spectrum of Hz in the vibrationally excited v2 state are presented. These transitions occur in the far-infrared region, and their observation may be complicated by vi u2 difference transitions. Examples of these are also given. Forbidden rovibrational transition frequencies and linestrengths have also ...

Superfluidity in Neutron Star Matter