6,255 research outputs found
Thin Films of 3He -- Implications on the Identification of 3 He -A
Recently the identification of 3He-A with the axial state has been
questioned. It is suggested that the A-phase can actually be in the axiplanar
state. We point out in the present paper that experiments in a film geometry
may be useful to distinguish the above two possibilities. In particular a
second order phase transition between an axial and an axiplanar state would
occur as a function of thickness or temperature.Comment: 3 pages, no figures latex- revtex aps accepted by J. of Low
Temperature Physic
Pairing Symmetry in the Anisotropic Fermi Superfluid under p-wave Feshbach Resonance
The anisotropic Fermi superfluid of ultra-cold Fermi atoms under the p-wave
Feshbach resonance is studied theoretically. The pairing symmetry of the ground
state is determined by the strength of the atom-atom magnetic dipole
interaction. It is for a strong dipole interaction; while it becomes , up to a rotation about z, for a weak one (Here < 1 is a
numerical coefficient). By changing the external magnetic field or the atomic
gas density, a phase transition between these two states can be driven. We
discuss how the pairing symmetry of the ground state can be determined in the
time-of-flight experiments.Comment: 12 pages, 7 figure
Josephson Current between Triplet and Singlet Superconductors
The Josephson effect between triplet and singlet superconductors is studied.
Josephson current can flow between triplet and singlet superconductors due to
the spin-orbit coupling in the spin-triplet superconductor but it is finite
only when triplet superconductor has , where and
are the perpendicular components of orbital angular momentum and spin angular
momentum of the triplet Cooper pairs, respectively. The recently observed
temperature and orientational dependence of the critical current through a
Josephson junction between UPt and Nb is investigated by considering a
non-unitary triplet state.Comment: 4 pages, no figure
Josephson Effect between Condensates with Different Internal Structures
A general formula for Josephson current in a wide class of hybrid junctions
between different internal structures is derived on the basis of the Andreev
picture. The formula extends existing formulae and also enables us to analyze
novel B-phase/A-phase/B-phase (BAB) junctions in superfluid helium three
systems, which are accessible to experiments. It is predicted that BAB
junctions will exhibit two types of current-phase relations associated with
different internal symmetries. A ``pseudo-magnetic interface effect'' inherent
in the system is also revealed.Comment: 4 pages, 2 figure
Dissipation of the 3^He A-B Transition
A rigorous hydrodynamic theory of the A-B transition is presented. All
dissipative processes are considered. At low interface velocities, those
occurring on hydrodynamic length scales, not considered hitherto, are most
probably the dominant ones.Comment: 13 pages, REVTeX, 2 figures, ITP-UH 13/9
- …